Thornton, Colorado, USA
UpdatedSun, 20-Sep-2020 11:30pm MDT 


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Monday brings cooler daytime temperatures, overnight wind and rain

Monday, June 8th, 2020 5:04am MDT

A bit of a mixed bag of weather for Thornton today. The day starts out nice enough and will bring a much-needed break from the heat. Later today though, a strong front will be pushing through bringing another round of wind and some rain.

The day starts out with sunny skies and then we will see a few clouds this afternoon. High temperatures today will top out in the upper 70s, coming close to the average high for the date of 80 degrees.

A cold front is working its way toward us and will begin to make itself felt this afternoon. This will initially take the form of breezy winds this afternoon that will be increasing in the evening.

As the front pushes through, gusts to 50mph will be possible overnight. As such, a High Wind Warning has been issued for the period from 6:00pm this evening to 3:00am tomorrow morning. Along with the wind, we will see some scattered rain shower activity after 5:00pm and lasting through the overnight hours.

Tonight, in addition to the aforementioned wind, mostly cloudy skies will be above with overnight lows in the mid-40s.

Keep an eye on those wind speeds with our live weather gauges here.

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Unseasonably warm temps, some chances for storms for Thornton’s weekend

Friday, June 5th, 2020 4:56am MDT

There will be no appreciable break from the heat for us this weekend. Mercury readings are going to remain well above normal although one day does bring a decent chance for a thunderstorm.

For Friday, the day looks much like the past couple. We will have sunny skies for much of the day then see increased clouds in the PM. Highs will again push toward the mid-90s. There will be some scattered PM thunderstorm activity although for us wind looks to be the most notable feature. Tonight, mostly cloudy skies will be above with lows in the low 60s.

Saturday will be the “coolest” day of the three day period although still warmer than normal. Look for highs around 90 degrees. Partly sunny skies will be above as a weak system makes itself felt. The afternoon brings isolated thunderstorms that may, finally, provide a bit of moisture. Saturday night, winds will be breezy, skies mostly clear and lows will drop to the mid-50s.

Sunday sees the temperatures rebound with highs back into the mid-90s. It will be sunny and breezy winds will be with us for much of the day.

Have a great weekend!

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Thornton’s Thursday brings another day with unseasonably warm temps, just a slight chance for storms

Thursday, June 4th, 2020 4:54am MDT

Not a lot of change in our weather for today versus what recent days have brought. Temperatures will again be well above normal and a few thunderstorms may threaten in the afternoon.

Sunny skies start us off and then we will see a few more clouds as the day progresses. High temperatures will once again be in the low to mid-90s, well above the average high for the date of 78 degrees.

Scattered thunderstorms will develop after 3:00pm and continue until about sunset. Unfortunately, most of these will bring little more than some gusty winds.

Tonight, skies will clear and overnight lows will dip to the upper 50s.

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Thornton’s June weather preview: Temperatures climb, severe weather chances increase

Wednesday, June 3rd, 2020 3:45pm MDT

Thornton's June weather preview.Extreme weather can occur during in month in Colorado we well know.  June however is when traditional spring severe weather arrives in the state oftentimes with hail, damaging wind and tornadoes.

Over 40 percent of the tornadoes that occur in Colorado happen during the month of June.  Far more common are thunderstorms with hail and wind, each responsible for extensive damage each year.

While severe weather is common, so too are brilliantly sunny and mild days as we close out spring and enter summer.  If you are looking for cold, it isn’t likely but it is possible as the Denver area has seen freezing temperatures and yes, even snow, during the month.

Read more about Thornton and Denver’s June weather and a look ahead at this year.

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May 31 to June 6: This week in Denver weather history

Tuesday, June 2nd, 2020 6:47am MDT

This Week in Denver Weather History

An extremely eventful week in Denver weather history.  Most notably for longtime Thornton and Northglenn residents is the 28 year anniversary of the infamous Thornton Tornado which struck on June 3, 1981.

From the National Weather Service:


In 1995…a cool period with light morning showers and moderate to heavy afternoon showers and thunderstorms pushed rivers already swollen from mountain snow melt over their banks causing minor flooding.  Streams and rivers such as the South Platte and Boulder Creek flooded meadowlands…bike paths…roads near streams…and other low lying areas.  No significant property damage was reported and crop damage was unknown.  Rainfall totaled 1.79 inches at the site of the former Stapleton International Airport and only 1.51 inches at Denver International Airport.


In 1894…heavy rain combined with snowmelt runoff caused widespread flooding over the South Platte River basin. Rainfall was heaviest in the foothills where 5 to 8 inches were measured over the 4 days.  Heavy rainfall west of Boulder flooded mining towns and damaged mining properties.  In the canyons above Boulder…railroads and roads were washed out along with many bridges.  The floodwaters spread into central Boulder and covered a wide area from University Hill north to near Mapleton Hill to a maximum depth of 8 feet.  Many houses were swept away…and every bridge in Boulder was destroyed. A few people…trapped in their homes by the floodwaters… Had to be rescued.  However…the gradual rise of the flood waters resulted in only one death.  Boulder Creek spread to a width of nearly one mile in the pasture land to the east of Boulder.  Extensive flooding on Left Hand Creek north of Boulder washed away railroad and wagon bridges.  The heavy cloudbursts caused flooding on Bear Creek…which washed away bridges…railroad tracks…and structures and destroyed the canyon roadway.  Morrison sustained the heaviest flood damage on bear creek.  In Denver…rainfall totaled only 1.50 inches on the 30th and 31st…but the heavy rainfall on upstream tributaries of the South Platte River caused the river to rise as much as 10 feet above the low water mark in the city…which caused some flooding of pasture land downstream to a depth of 6 feet near Brighton.


In 1935…heavy thunderstorm rains overnight caused flash flooding east of the city on both Kiowa and Bijou Creeks… Resulting in a total of 9 deaths.  Most of the damage was on Kiowa Creek where there were more structures.  The water rose rapidly during the storm…ripping houses and stores from their foundations and sweeping them downstream. Precipitation in Denver totaled only 0.01 inch.  Hail fell in the city for a short time.  The hail was very small and caused no damage.

In 1983…a late storm of rain and snow hit the Front Range. Over an inch of rain fell at some spots…and above 7 thousand feet…1 to 5 inches of snow whitened the ground. Some snow flakes even fell in the western suburbs of metro Denver on the night of the 30th.

In 2002…unseasonably warm weather at the end of the month resulted in 3 temperature records.  High temperature of 91 degrees on the 30th equaled the record maximum for the date.  Low temperature of 61 degrees on the 31st was a record high minimum for the date.  High temperature of 93 degrees on the 31st was a record maximum for the date.


In 1917…rainfall totaled 0.55 inch and was mixed briefly with snow around midday.  Only a trace of snow fell. Cold temperatures during the day resulted in a high of 44 degrees and a low of 35 degrees.  The month closed as the coldest May on record with a mean temperature of only 48.7 degrees…about 8 degrees below normal.  The cold temperatures during the month had a marked effect on shade trees and shrubs in the city.  Elms were just starting to leaf.  Leaves on cottonwoods and maples were only half formed.  Lilacs were just blooming…and snowball clusters would not bloom for days.

In 1959…the public reported a tornado briefly touching the ground 10 miles south of Stapleton Airport.  No damage was reported.

In 1984…a thunderstorm microburst produced a wind gust to 67 mph…7 miles east of Boulder.

In 1991…hail to golf ball size pummeled southern and southeastern sections of metro Denver and continued on east to Watkins.  Several houses and cars were damaged.  Later… Thunderstorms dumped heavy rain across the city of Denver… Causing street flooding in an area just south of downtown and just northwest of downtown.  Water was up to 10 inches deep over northwest Denver.  A brief tornado touched down in Castle Rock where 3/4 inch diameter hail also fell.

In 1993…thunderstorms dropped dime size hail in Commerce City.

In 1994…lightning struck an apartment in Louisville and damaged electronic equipment…including a computer.

In 2006…a severe thunderstorm produced 1 inch diameter hail near Boulder.


In 1875…a windstorm during the late afternoon and early evening produced sustained winds to 50 mph.

In 1898…south winds were sustained to 41 mph with gusts to 46 mph.

In 1917…a trace of unmelted snow fell in downtown Denver. Precipitation for the day totaled 0.08 inch…half of which was estimated to be from melted snow.

In 1919…snowfall of 0.4 inch was measured in downtown Denver.  This was the greatest calendar day and 24-hour snowfall ever recorded during the month of June. Precipitation (rain and melted snow) totaled 0.15 inch. Two temperature records were set.  The low temperature of 32 degrees was a record minimum for the date.  The high temperature of only 40 degrees was a record low maximum for the date and the month.  North winds were sustained to 36 mph with gusts to 40 mph.

In 1951…a trace of snow fell at Stapleton Airport.

In 1961…hail as large as 1 1/2 inches in diameter fell in west Denver with hail to 1 1/4 inches reported in derby.

In 1965…a man struck by lightning in southeast Denver died shortly after being admitted to a hospital.  Lightning damaged power lines in east and southeast Denver.

In 1980…strong thunderstorm winds blew in the windows of a mobile home in Northglenn.

In 1990…a thunderstorm produced wind gusts to 63 mph in Boulder.  A small tornado touched down in a farmer’s field between the towns of Louisville and Lafayette.  Another tornado was spotted in an open field 3 miles west of Brighton.  A funnel cloud was sighted near Hudson. A microburst wind gust to 55 mph was recorded at Stapleton International Airport.  No damage was reported from any of these events.

In 1991…severe thunderstorms producing large hail…damaging winds…funnel clouds…and heavy rain were widespread across metro Denver.  Funnel clouds were reported in Lakewood… Boulder…Arvada…and just east of the rocky mountain arsenal.  Hail up to golf ball size fell in Lakewood…just west of Sedalia…in Littleton…Arvada…Englewood…and the city of Denver.  A mobile home park in Jefferson County reported hail to 3 feet deep.  Up to 1.00 inch of rain fell in 45 minutes near Boulder…causing Boulder Creek to flow out of its banks.  Rock and mud slides forced the closure of many roads in Boulder County.  Later in the afternoon thunderstorms produced rainfall amounts of 2 to 3 inches over a couple of hours.  Clear Creek in Golden spilled over onto U.S. Highway 6.  Heavy rains washed away part of a bridge near Erie.  Water was up to 18 inches deep in Westminster.  Wind gusts to 58 mph were reported at Stapleton International Airport where 1/4 inch hail fell… And heavy thunderstorm rainfall totaled 0.82 inches…briefly reducing the visibility to 1 1/4 miles.  Estimates of total damage from these storms would exceed 7 million dollars.

In 1994…hail up to 1 inch in diameter fell over south Denver and Littleton.

In 1997…two short lived-tornadoes formed near Bennett…but did no reported damage.

In 2002…strong winds from the outflow of dissipating showers developed to the east of Denver.  Near Strasburg…a spotter recorded a wind gust to 58 mph.


In 2002…unusually very warm weather for so early in June resulted in two temperature records.  Maximum temperatures of 96 degrees on the 1st and 93 degrees on the 2nd were record highs for each date…respectively.


In 1977…unusually warm weather for this early in June resulted in 3 maximum temperature records being equaled at the time:  88 degrees on the 1st…90 degrees on the 2nd… And 93 degrees on the 4th.  Maximum of 91 degrees on the 3rd was not a record.


In 2012…it was the hottest June in Denver since weather records began back in 1872. The average temperature for the month was 75.0 degrees which was 7.6 degrees above normal. There were a total of seventeen 90 degree days in the month of June. The highlight of record setting month was a stretch of five consecutive 100 degree days from the 22nd to the 26th. This was only the third time in Denver weather history in which this happened. Two of the high temperatures during the stretch peaked at 105 degrees… Which set the all-time record for the month of June and tied the all-time maximum temperature for Denver.


In 1914…flooding occurred on Boulder creek when heavy rains added to heavy snowmelt runoff.  Flooding damaged the water supply system from the mountains into Boulder and destroyed roads and bridges in the canyons above Boulder.  The flooding in central Boulder was described as the worst since the tragic flood of May 29th through June 3rd in 1894.  However…there was no reported loss of life.  The flood waters also inundated pasture land to the east of the town.

In 1951…the lowest recorded temperature in June…30 degrees… Occurred. The unusually cold weather was accompanied by 0.3 inch of snowfall.  Precipitation…both rain and melted snow…totaled 0.30 inch.

In 1966…microburst winds gusted to 51 mph at Stapleton International Airport.

In 1981…a severe thunderstorm roared through metro Denver… Dumping 2.00 inches of rain in as little as 20 minutes and bombing many areas with hail to 1 3/4 inches in diameter. The heavy rain caused local flooding with up to 3 feet of water in some streets in northwest metro Denver.  Part of a street was washed out in Thornton.  Lightning strikes started a fire and caused a power outage just north of Denver.  Lightning also struck a barn which burned to the ground in Brighton.  Numerous cars sustained minor hail damage.  A tornado was spotted 4 miles northeast of the rocky mountain arsenal…but caused no damage.

In 1982…severe thunderstorms produced large hail across metro Denver.  Hail to 3/4 inch in diameter was reported in Louisville and northeast Denver.  Golf ball size hail fell near Strasburg where two tornadoes were also sighted.

In 1983…a tornado touched down 5 miles south of Bennett.  It destroyed an outbuilding and did extensive damage to greyhound dog shelters.  Golf ball size hail fell near the tornado…destroying some hay.

In 1985…3/4 inch hail fell in southwest metro Denver.

In 1989…large hail fell over eastern and central Denver.  A few stones were as large as baseballs…and many ranged from 3/4 inch to golf ball size.  The hail piled up 2 to 4 inches deep in some areas.  Hail to 3/4 inch fell at Buckley Field in Aurora…and 7/8 inch hail fell just east of Aurora.  A home in Louisville was struck by lightning and was 30 percent destroyed by the ensuing fire.

In 1991…strong thunderstorm winds in Arapahoe County…14 miles southeast of Stapleton International Airport…damaged the roof of a home and a radio antenna.  A funnel cloud… 4 miles northeast of Stapleton International Airport…was sighted for 11 minutes by national weather service observers.

In 1993…a tornado touched down briefly in south Denver… Destroying the 4-inch thick concrete roof of a building and causing about 20 thousand dollars in damage.  The twister also picked up a trash dumpster and dropped it onto a car 30 feet away…causing an estimated 3 thousand dollars in damage.  Hail up to an inch in diameter fell in Aurora… Conifer…and Bennett.  Two funnel clouds were spotted near Deckers.  A funnel cloud was sighted for 19 minutes by national weather service observers to the southwest of Stapleton International Airport.

In 1994…lightning struck two homes in Denver…starting fires which caused considerable damage to both.  Hail to 3/4 inch in diameter fell in Golden.

In 1995…lightning struck a house in Nederland…causing a fire that was doused by subsequent rainfall.  A portion of the roof and wall was damaged.  The storm also left most of Nederland without power for two hours.  Lightning also struck a high chimney of an elementary school in west Denver.  The jolt sprayed bricks around the school yard and parking lot.  Twenty students and teachers were in the school building at the time…but all escaped without injury.  A funnel cloud was sighted over Fort Lupton…and 3/4 inch hail fell in Lafayette.

In 2003…severe thunderstorms produced strong winds and large hail.  Hail as large as 1 1/2 inches in diameter fell near Parker.  Estimated wind gusts to 70 mph occurred near Parker and near Denver International Airport where thunderstorm wind gusts to 52 mph were recorded.  Wind gusts to 60 mph were estimated near Bennett.

In 2005…a severe thunderstorm produced hail as large as 1 inch in diameter in the city of Denver.  A tornado was sighted near Bennett along with 3/4 inch hail.

In 2008…severe thunderstorms produced large hail over western Arapahoe…northern Denver and southern Weld counties.  Hail…2 inches in diameter…was observed near Brighton; with hail to 1 1/2 inches in diameter…5 miles east of prospect.  Hail to one inch in diameter was observed near Buckley Field…Frederick and Denver.

In 2012…severe thunderstorm produced damaging thunderstorm winds.  Peak wind gusts included:  82 mph near Strasburg… 61 mph at Buckley Field…60 mph near byers and southwest Denver…58 mph near Watkins and 52 mph at Denver International Airport.  The microburst winds caused extensive tree and roof damage.  In addition…hail up to 1 inch in diameter was reported 3 miles east-southeast of Parker.


In 1989…heavy rain drenched metro Denver with the greatest amounts recorded on the 3rd.  Total rainfall ranged from 1 1/2 to 3 inches.  Roads were washed out in Boulder County… And flooded basements caused water damage to houses in the Gunbarrel section of Boulder.  In suburban Denver…heavy rain caused minor flooding along Lena Gulch in Jefferson County where two mobile home parks were evacuated. Rainfall totaled 1.66 inches at Stapleton International Airport.

» Click here to read the rest of May 31 to June 6: This week in Denver weather history

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May 2020 top shots: Monthly photo slideshow

Sunday, May 31st, 2020 3:34pm MDT
A beautiful spring sunset. (David Canfield)

A beautiful spring sunset. (David Canfield)

Colorado’s famously highly variable weather seems to showcase itself during the month of May when a variety of weather conditions can be seen.  This provides a prime opportunity for photos of everything weather to flora to fauna.

The month of May can bring extremes.  Snow is not entirely uncommon during the month but more common is severe weather, particularly in the latter half of the month.  Thunderstorms become more frequent and their associated hazards – lightning, wind, hail and tornadoes – are usual visitors.  Providing additional subjects for pictures are the emerging spring flowers and our abundant wildlife.

  • Slideshow updated May 31, 2020. To learn more about how to send your photo to us for inclusion in the slideshow, see below the slideshow.

Showcasing images captured by ThorntonWeather.com readers as well as some of our own, our monthly slideshow covers the entire gamut of weather-related imagery.

Sunsets, sunrises, wildlife and of course every type of weather condition are vividly depicted in images captured from yours and our cameras.

What is missing in the slideshow above?  Your photo!

Our monthly photo slideshow is going to feature images that we have taken but more importantly images that you have captured.  The photos can be of anything even remotely weather-related.

Landscapes, current conditions, wildlife, pets, kids.  Whimsical, newsy, artsy.  Taken at the zoo, some other area attraction, a local park, a national park or your backyard.  You name it, we want to see and share it!

Images can be taken in Thornton, Denver or anywhere across the extraordinary Centennial State.  We’ll even take some from out of state if we can tie it to Colorado somehow.

We’ll keep the criteria very open to interpretation with just about any image eligible to be shown in our slideshows.

What do you win for having your image in our slideshow?  We are just a ‘mom and pop’ outfit and make no money from our site so we really don’t have the means to provide prizes.  However you will have our undying gratitude and the satisfaction that your images are shared on the most popular website in Thornton.

To share you images with us and get them included in the slideshow just email them to us or share them with ThorntonWeather.com on any of the various social media outlets.  Links are provided below.

So come on, get those camera’s rolling!

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Thornton’s weekend to feature unseasonably warm temperatures, some thunderstorms

Friday, May 29th, 2020 5:39am MDT

A pretty nice looking three-day period for us. Temperatures will be a good bit warmer than normal and each day brings a chance for thunderstorms.

For today, sunny skies start things off then the afternoon will see some cloud cover arrive. Highs will be in the mid to upper 80s. There is just a slight chance for an afternoon thunderstorm. Tonight, any storm activity should end by sunset. Overnight lows will be in the mid-50s.

Saturday provides a little bit of a cool down. Highs will be in the low to mid-80s under mostly sunny skies. We do stand a better chance of seeing some showers and thunderstorms in the afternoon into the evening. Overnight Saturday night into Sunday, skies will be mostly cloudy with lows in the mid-50s.

The weekend closes out with another unseasonably warm day. Highs will be in the upper 80s with mostly sunny skies. As is typical, some scattered PM thunderstorms will be seen.


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Near normal temperatures, a slight chance for storms for Thornton’s Thursday

Thursday, May 28th, 2020 4:56am MDT

We will have a day of pretty typical weather for the date. Temperatures will be at, perhaps a bit above normal, and the afternoon and evening bring a chance for storms.

Mostly sunny skies start us off and then cloud cover will gradually increase through the morning and afternoon. Highs today will top out in the upper 70s. The afternoon and evening will see some scattered thunderstorm activity but nothing dramatic is expected.

Tonight, any thunderstorms will end by midnight and then skies will slowly clear. Lows will be in the low 50s.

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May 24 to May 30: This week in Denver weather history

Wednesday, May 27th, 2020 6:48pm MDT

This Week in Denver Weather History

Severe weather in spades is evident on our look back at Denver weather history this week. Notable is an F1 tornado in 1990 that moved through the Northglenn and Thornton area that damaged buildings, cars and trees.

From the National Weather Service:


In 2002…lightning sparked a wildfire near Deckers. Extremely dry conditions and very strong winds the following day allowed the fire…known as the Schoonover…to consume 3850 acres before it could be contained. Thirteen structures were destroyed…including 4 homes…resulting in 2.2 million dollars in damage.


In 2002…a pacific storm system brought much needed snow to the mountains and foothills with a mix of rain and snow on the plains. The most snow fell from central Jefferson County northward. Snow totals included: 13 inches in Coal Creek Canyon…11 inches near Evergreen and atop Gold Hill… 10 inches near Blackhawk and Conifer and atop Crow Hill… 9 inches near Rollinsville…and 8 inches near Genesee and Golden. Rain was mixed with snow across the city. Precipitation totaled 0.61 inch at Denver International Airport. Snowfall was less than an inch at the site of the former Stapleton International Airport. The storm brought unseasonably cold air to metro Denver. Three temperature records were set. Low temperature of 31 degrees on the 23rd was a record minimum for the date…as was the low of 32 degrees on the 24th. The high temperature of only 48 degrees equaled the record low maximum for the date.


In 1953…a microburst caused a brief wind gust to 55 mph at Stapleton Airport.

In 1957…walnut size hail…1 1/2 inches in diameter…fell in east Denver. Only 1/4 inch hail was measured at Stapleton Airport.

In 1958…rainfall totaled 1 to 2 inches across metro Denver. Rainfall was only 0.37 inches at Stapleton Airport.

In 1974…a tornado was observed briefly near Watkins. No damage was reported.

In 1980…strong gusty winds of at least 60 mph damaged buildings in parts of Denver. Several buildings were unroofed in Sheridan. The flying debris damaged other structures. Strong microburst winds gusted to 52 mph at Stapleton International Airport.

In 1991…a tornado touched down briefly in open country near Bennett. No damage was reported.

In 1994…weather spotters reported 2 funnel clouds over Aurora and a short-lived waterspout on Cheery Creek Reservoir.

In 1997…hail to 1 inch in diameter fell in Broomfield with 3/4 inch hail measured in Boulder.

In 1998…a tornado struck a wooden hangar at the Aurora airpark. The hangar collapsed…damaging a car and a single engine plane parked inside. An adjacent steel hangar sustained only minor damage. The tornado moved northeast…hopped I-70…and touched down again in an open field. Earlier…a weak tornado touched down briefly in an open field 10 miles southeast of Buckley Field.

In 2003…severe thunderstorms produced large hail over northern and southern metro Denver. Hail as large as 2 3/4 inches in diameter was measured 10 miles northwest of Hudson and to 2 inches in diameter 10 miles northeast of Fort Lupton. One inch diameter hail fell in Fort Lupton. Hail to 1 inch in diameter fell near Parker and to 3/4 inch near Franktown.

In 2004…severe thunderstorms moved across northwest and north metro Denver. Hail as large as 1 inch in diameter fell in Broomfield and Thornton with 3/4 inch hail measured near Arvada and Hudson and in the city of Denver.

In 2005…severe thunderstorms produced hail as large as 1 inch in diameter in Arvada and the city of Denver.

In 2014…a severe thunderstorm in Lakewood produced hail… Up to 1 inch in diameter.

In 2016…a long-lived supercell formed over south Denver and tracked across northeast Adams and continued to produce severe weather as into moved into Yuma County. The length of its path was approximately 121 miles. The storm produced hail up to 1.5 inches in diameter in southeast Denver. As it moved across northeast Adams County…several power poles were sheared off at the base by straight-line winds to 80 mph southwest of Leader. The damage path became more extensive as the storm moved into the northeast plains of Colorado. At Denver International Airport…1.15 inches of precipitation fell which set a new daily precipitation record. The storm produced heavier rainfall on one to two inches east of Denver…with over 4 inches in central Arapahoe County.


In 1996…a late spring snowstorm dumped 4 to 10 inches of snow over the Front Range foothills. Conifer picked up 10 inches of new snow; aspen springs…9 inches; and central city…8 inches. The sticky…heavy snow clung to power lines and pulled tree branches down…causing power outages to about 1200 homes in the conifer area. It took up to 6 hours to restore power to some residences. Lightning struck a telephone data cabinet in conifer on the 25th…which knocked out phone service to about 1500 customers. Widespread rain fell across metro Denver… Where rainfall totaled 2.07 inches at the site of the former Stapleton International Airport and 1.66 inches at Denver International Airport where north winds gusted to 24 mph on the 26th.

In 2010…high winds preceding a cold front… Swept across the Front Range foothills and urban corridor. In Aurora… The wind damaged the roof of Rangeview High School. In Conifer and Denver…the wind downed trees and power lines and caused several brief outages. The downed power lines also caused several cars to catch fire in the vicinity of 1590 Cook St. in Denver. Peak wind gusts included: 82 mph at Highlands Ranch…67 mph… 4 miles east of Franktown and Longmont; 65 mph in Boulder…64 mph in Centennial and Denver International Airport…62 mph near Parker and 60 mph in Arvada.


In 1877…lightning killed one person in west Denver and struck several houses. The bolt struck the house of the “home laundry” stunning the occupants and killing a lady who was holding one of her grand children in her arms. The child escaped unhurt. The lightning also struck the top of a tree in front of the house and partially peeled the bark off the tree. Lightning struck a church in the Evans addition and another tree in east Denver. Lightning struck the switch room at the telegraph office where the operator saw small balls of lightning pass across the room to the stove. The thunderstorm pelted the city with only pea size hail. Precipitation from the storm totaled 0.40 inch in downtown Denver.

In 1880…light rain all afternoon totaled only 0.24 inch in the city…but was valuable to stockmen and farmers due to the very dry…parched weather conditions on the plains.

In 1965…a tornado was sighted by a pilot 30 miles south southeast of Denver. No damage was reported. Another pilot reported 3/4 inch hail 30 miles east of Denver. The state patrol reported that a man was killed when a fierce gust of wind swept him from the back of a pick-up truck in northwest Douglas County. The man was holding a mattress in the bed of the truck.

In 1974…a microburst wind gust to 53 mph was recorded at Stapleton International Airport. A pilot reported a tornado 20 miles east of Denver.

In 1976…lightning struck a home in Boulder…shattering 2 large trees and damaging a television set.

In 1997…hail as large as 1 3/4 inches in diameter fell near Watkins. Hail to 3/4 inch in diameter fell in Broomfield and near Lockbuie.

In 2000…3/4 inch diameter hail fell at Cheery Creek Reservoir in Aurora. Thunderstorm winds gusted to 51 mph at Denver International Airport where small hail fell.

In 2006…a severe thunderstorm produced an estimated wind gust to 70 mph in Hudson. The strong winds damaged the roof of a home. A thunderstorm produced southwest wind gusts to 54 mph at Denver International Airport.


In 1950…a major storm dumped 10.0 inches of snowfall downtown and 10.7 inches at Stapleton Airport where northwest winds gusted to 30 mph on the 25th. The storm caused extensive damage to utility wires and trees which were in full leaf. A daily record minimum temperature of 31 degrees occurred on the 25th. This was the coldest temperature on this date in 79 years and for so late in the season.

In 1989…a late season snow storm dropped snow as low as 6 thousand feet along the Front Range. Most places in the foothills had 2 to 5 inches of snow. Overnight rainfall totaled 0.33 inch at Stapleton International Airport where north winds gusted to 37 mph on the 25th.

In 1994…lightning struck a television transmitter on Lookout Mountain near Golden and burned out a switcher…which disrupted cable service for 2 hours.


In 1897…apparent post-frontal north winds were sustained to 42 mph with gusts as high as 48 mph.

In 1942…the all-time highest recorded temperature in May…95 degrees…occurred.

In 1978…two children were struck and killed by lightning on a junior high school playground in Parker.

In 1987…1 inch diameter hail fell near Boulder and Bennett. The hail was fairly soft and caused no damage.

In 1993…dry thunderstorms produced wind gusts to 81 mph at Jefferson County airport near Broomfield. Several trees were blown down by the strong winds. Microburst winds gusted to 51 mph at Stapleton International Airport.

In 1995…a woman was injured in Littleton when the car she had just entered was struck by lightning. All of the windows in the car were blown out by the strike. A funnel cloud was sighted near Littleton.

In 2000…a strong microburst wind gust to 92 mph flipped a small airplane on its back and blew a dc-3 loose from its moorings…which allowed it to roll onto a grassy field at Front Range airport near Watkins.

In 2010…severe thunderstorms pounded parts of the urban corridor with very large hail…heavy rain… Damaging winds and a tornado. The hail…ranging in size from 1 inch to 2 3/4 inches in diameter…struck Brighton… Commerce City and northeast Denver the hardest. The storms continued to spread destruction to the north and east…impacting byers…Hudson… Deer Trail and Prospect Valley. The combination of hail and wind stripped the bark and branches from trees. Numerous accidents were reported as the hail accumulated up to a foot deep. Snowplows were called out to clear the roadways. Flash flooding occurred along State Highway 52 between Hudson and Keenesburg…and forcing the closure of the highway. Widespread crop damage was also reported as the area was inundated with up to 18 inches of water. Extensive damage to homes…businesses and automobiles was reported with the damage estimated to be around 70 million dollars. A tornado touched down near Denver International Airport…but did no damage. Lightning struck a child in Commerce City while she was watching television. She suffered minor injuries to her leg. At the Rocky Mountain Arsenal Wildlife Refuge…a lightning strike killed a bison. At Denver International Airport…only 0.01 inch of rainfall was observed… Along with a peak wind gust to 48 mph from the southeast.

In 2016…severe thunderstorms produced hail up to one inch in diameter near Castle Rock…The Pinery and Watkins.


In 1995…a cool period with light morning showers and moderate to heavy afternoon showers and thunderstorms pushed rivers already swollen from mountain snow melt over their banks causing minor flooding. Streams and rivers such as the South Platte and Boulder creek flooded meadowlands…bike paths…roads near streams…and other low lying areas. No significant property damage was reported and crop damage was unknown. Rainfall totaled 1.79 inches at the site of the former Stapleton International Airport and only 1.51 inches at Denver International Airport.

» Click here to read the rest of May 24 to May 30: This week in Denver weather history

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Wednesday’s weather to offer mild temperatures, chance for thunderstorms

Wednesday, May 27th, 2020 4:56am MDT

A largely typical day for this time of year ahead for Thornton. Temps will be a bit above normal and we see some chances for thunderstorms in the PM.

Mostly sunny skies start us off and will be with us through the morning. The afternoon brings an increase in cloud cover. Highs today will top out right near the 80 degree mark.

There will be just a slight chance for an afternoon thunderstorm then the evening seeing opportunities increase. Gusty winds, brief, heavy rain and some small hail will be possible.

Tonight, any thunderstorms will end by midnight and skies will become mostly clear. Overnight lows will dip to the low 50s.

Keep an eye out for those thunderstorms here.

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