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Thornton, Colorado, USA
UpdatedSat, 25-Sep-2021 7:15am MDT 
 

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Pleasant spring weather conditions for Thornton’s Thursday

Thursday, May 6th, 2021 4:58am MDT

A break from the unsettled, cool conditions of recent days. Today sees one of those spring days we all love with lots of sun and mild temperatures.

Sunny skies start us off and will be with us throughout the daytime hours. Overall conditions will be calm and dry. High temperatures will be topping out in the low to mid-70s.

Tonight, temperatures will drop to the mid-40s under mostly clear skies. Enjoy!

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Wednesday brings another cool day, another chance for showers

Wednesday, May 5th, 2021 5:04am MDT

Today’s weather looks to be a good bit like we experienced yesterday. We will see some sun, temps will be on the cool side and the afternoon brings a chance for showers.

Partly sunny skies start us off in the morning and we will similar sky conditions for the majority of the day. A few sprinkles of rain may be seen by late morning then early afternoon brings some scattered thunderstorm activity. Any cells that move through should be relatively benign as there isn’t much instability to aid in their development. High temperatures will top out in the low 60s.

Tonight, skies will be clearing and overnight lows will drop to the upper 30s.

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May 2 to May 8: This week in Denver weather history

Tuesday, May 4th, 2021 7:03am MDT

This Week in Denver Weather History

As we enter the month of May, our weather history calendar is as eventful as ever however we start to see a transition with fewer snow events and more typical spring events.  Of note are many events that caused flooding, severe winds, tornadoes, and lightning.

29-2

In 1954…a major storm dumped 10.1 inches of snowfall at Stapleton Airport.  Most of the snow…7.5 inches…fell on the 29th and 30th.  The maximum snow depth on the ground was 5 inches on the 30th due to melting.  No strong winds accompanied the storm.

1-2

In 1903…post-frontal rain changed to light snow overnight… But totaled only 2.0 inches.  This was the last snow of the season.  Northeast winds were sustained to 45 mph with gusts to 48 mph on the 1st.

1-5

In 1898…snowfall totaled 15.5 inches in downtown Denver. Most of the snow…6.2 inches…fell on the 3rd.  Most of the snow melted as it fell.  The greatest snow depth on the ground was only 2.5 inches on the 3rd at 8:00 pm. This was the only snowfall during the month.  Northeast winds were sustained to 22 mph on the 1st.

2

In 1874…strong winds upset two railroad passenger coaches near Georgetown.  The baggage was retrieved and placed in a heavy…large wagon.  The passengers then seated themselves on top of the baggage.  Another strong gust of wind upset the wagon.  The driver’s shoulder was dislocated…and a passenger’s leg was badly injured. In Denver…northwest winds increased and blew in gusts and heavy winds were observed on the ridge tops.  On the Kansas Pacific R.R. east of Denver…the wind was so strong that it blew the train back several lengths…which caused the train to be about 7 hours late arriving in the city.

In 1901…south winds were sustained to 50 mph with gusts to 60 mph from an apparent thunderstorm with hail.

In 1944…snowfall of 8.3 inches was accompanied by a thunderstorm.  This was the last snowfall of the season and the only snow of the month.  Northwest winds were sustained to 25 mph.

In 1955…southwest winds at speeds of 37 mph with gusts as high as 58 mph caused some blowing dust at Stapleton Airport.

In 1983…1 inch diameter hail fell a few miles south of Bennett.

In 1984…3/4 inch diameter hail fell in Northglenn.

In 1988…I-70 east of Denver was closed for the second straight day…this time due to snow and blowing snow producing up to 2 foot drifts.  While only 2 to 4 inches of snow fell across metro Denver…Strasburg…just east of Denver…received a foot of snow.  North winds peaked to 51 mph at Stapleton International Airport where snowfall totaled only 1.3 inches.

In 1995…lightning struck a house in Westminster sparking an attic fire.

In 2015…a sudden wind gust associated with a dissipating thunderstorm caught some flags attached to a lift and tipped it. Two men were injured when a lift at Civic Center Park in Denver fell on them during Cinco de Mayo festivities. Both men suffered from head injuries…one was in serious condition.

2-3

In 1979…heavy rain changed to snow on the 2nd.  Snowfall totaled 3.9 inches at Stapleton International Airport… Where northwest winds gusted to 26 mph.  The greatest depth of snow on the ground was only 1 inch at midday on the 2nd due to melting.  Total precipitation for the 2 days was 1.65 inches.

2-4

In 1987…a slow moving storm brought rain…wind…and snow to metro Denver.  Rainfall totaled 1.04 inches at Stapleton International Airport where north winds gusted to 48 mph on the 3rd.  The foothills received 5 to 10 inches of snow.

2-5

In 2001…a very slow moving pacific storm system became parked near the Four Corners region…which allowed heavy snow to develop above 6500 feet in the foothills with a mix of rain and snow over lower elevations of metro Denver.  Snowfall totals included:  21 inches atop Crow Hill and at Idaho Springs; 19 inches near Blackhawk; and 18 inches in Coal Creek Canyon…Genesee…and 11 miles southwest of Morrison. Snowfall totaled 6.2 inches at the site of the former Stapleton International Airport.  Precipitation (rain and melted snow) totaled 2.09 inches at Denver International Airport where north winds gusted to 30 mph on the 2nd.

3

In 1898…heavy snowfall of 6.2 inches fell over downtown Denver.  Most of the snow melted as it fell.  The greatest snow depth on the ground was 2.5 inches during the evening.

In 1907…the all-time lowest recorded temperature in the month of May…19 degrees…occurred.

In 1925…an apparent microburst produced sustained northeast winds to 44 mph with gusts to 52 mph.  Rainfall was only 0.01 inch in downtown Denver.

In 1981…lightning struck 9 golfers at the south suburban golf course.  None were injured seriously.

In 1983…hail 1 1/2 inches in diameter fell at Green Mountain west of Lakewood…with 3/4 inch stones reported in Lakewood.

In 1986…a thunderstorm wind gust to 51 mph was recorded at Stapleton International Airport.

3-5

In 1908…rain changed to snow on the evening of the 3rd and continued through the early evening of the 5th. Snowfall totaled 10.0 inches over downtown Denver. This was the last measurable snow of the season. Precipitation totaled 1.51 inches.  North winds were sustained to 23 mph on the 3rd…33 mph on the 4th…and 21 mph on the 5th.  Three temperature records were set. High temperatures of 30 degrees on the 4th and 38 degrees on the 5th were record low maximum temperatures for the dates.  The reading on the 4th was also the all-time record low maximum for the month of May.

In 2007…a slow moving pacific storm system…from the desert southwest…brought a period of unsettled weather to the region.  During the 3-day period…locally heavy snow was reported over parts of the Front Range foothills. Storm totals included:  15 inches near Conifer…14.5 inches west of Jamestown…13.5 inches; 6 miles southwest of Evergreen…and 12.5 inches at Pine Junction.  Severe thunderstorms…producing large hail…up to one inch in diameter were observed in the vicinity of Boulder and Hudson.  Lightning struck a residence in Jefferson County. The roof was hit…causing the attic to catch fire. At Denver International Airport…lightning struck a United Airlines jet as it was pushing away from the gate.  The passengers were taken off the jet and put on another plane.

» Click here to read the rest of May 2 to May 8: This week in Denver weather history

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Some sun returns Tuesday, afternoon and evening bring scattered showers

Tuesday, May 4th, 2021 4:55am MDT

Having deposited a healthy 1.32” of rain, our latest storm system is working its way out. It will be slow to go though and while we will see some sun today, some showers will also be possible.

Partly to mostly sunny skies start us off and then cloud cover will ease further this morning. The afternoon will see the cloud cover begin to increase again. High temperatures today will top out right near the 60 degree mark. Scattered thunderstorms and showers will be possible after noon.

Most activity will wrap up by 6:00pm but a few showers may linger after dark. Tonight, skies will see some clearing with overnight lows around 40 degrees.

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Thornton’s May 2021 preview: From snow to severe storms

Tuesday, May 4th, 2021 4:32am MDT
Thornton, Colorado May 2013 weather preview.

Thornton, Colorado May 2013 weather preview.

Colorado’s famously highly variable weather seems to showcase itself during the month of May when a variety of weather conditions can be seen.

Winter-like temperatures and snow are possible as are mid-summer like temperatures or the more typical spring severe weather.

As the month starts out in 2021 we are going to enjoy unseasonably warm conditions for the first of the month then begin a period of cool, wet weather conditions. Long range forecasts portend an overall warmer than normal month with equal chances of below, at or above normal precipitation.

The month can certainly bring extremes.  Snow is not entirely uncommon during the month, oftentimes causing damage to newly bloomed trees.  More common however 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.

For a complete look at what lies ahead for the month of May, check out our full preview here.

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Cool and wet weather conditions start Thornton’s workweek

Monday, May 3rd, 2021 5:02am MDT

The storm system that arrived yesterday is very slowly working its way through and will continue to affect us throughout today. Cool temperatures and light rain will be the general rule.

Cloudy skies start us off and will be with us throughout the day. Winds are going to be breezy and out of the northeast. Light rain will continue to fall this morning then ease up a bit in the afternoon. High temperatures will top out in the mid-40s, about 20 degrees below normal.

This evening, rain will taper off and come to an end by about midnight. Skies will gradually clear overnight and lows will drop to the mid-30s.

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Thornton’s weekend starts out very warm and dry, will end cooler and wet

Friday, April 30th, 2021 4:58am MDT

Summer-like weather starts out the weekend with temperatures well above normal. The period will end though with cooler temperatures and a good dose or rain.

For Friday, sunny skies will be the rule throughout the day. Conditions will be calm and dry as we head for a high around the 80 degree mark. Tonight, skies will be mostly clear with overnight lows in the upper 40s.

Saturday will be the warmest day of the three-day period. Look for highs in the mid-80s with mostly sunny skies above. Saturday night, clouds will be increasing ahead of a cold front. Lows will be around 50 degrees.

The cold front will cool things down Sunday. Highs will be in the mid to upper 60s. A few sprinkles will be possible early then, after noon, rain will become widespread. Showers may become quite strong at times and will bear close watching.

Have a great weekend!

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Lots of sun, temperatures a bit above normal for Thornton’s Thursday

Thursday, April 29th, 2021 4:58am MDT

A pretty darned nice spring day ahead for us. We’ll enjoy blue skies above, calm conditions and mild temperatures.

Sunny skies start us off and will be with us through the morning. There might be a few clouds in the late afternoon but nothing too intrusive. Overall conditions will be calm and dry. High temperatures will climb close to the 70 degree mark, about 5 degrees above normal.

Tonight, skies will be mostly clear with lows in the low to mid-40s.

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April 2021 top shots: Monthly photo slideshow

Wednesday, April 28th, 2021 8:11am MDT
A gorgeous sunset over the Rocky Mountains on April 6, 2021. (David Canfield)

A gorgeous sunset over the Rocky Mountains on April 6, 2021. (David Canfield)

April can be a tricky month weather-wise with everything from mild temperatures to snow to severe weather being possible.  The good thing about that is that it provides plenty of chances for great photos!

April marks a transition between winter and summer for most of the country but for Denver it is especially true as we can see a stunning variety of weather.

The proverbial April showers are certainly a possibility for Denver. Snow? Tornadoes? Thunderstorms? You bet – all can happen!

Throw in our usual wildlife plus the wide variety of birds that return to the Centennial State for the spring and summer and there is a lot going on.

  • Slideshow updated April 28, 2021. 
  • 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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April 25 to May 1: This week in Denver weather history

Wednesday, April 28th, 2021 5:03am MDT

This Week in Denver Weather History

Snow continues to be a big part of the weather we can expect this time of year as we peer back in the Denver weather history books.  However, we also see more and more occurrences of spring severe weather including hail, damaging winds, dangerous lightning and even a tornado.

23-25

In 1935…heavy wet snow fell across metro Denver.  The storm started as rain on the 23rd and changed to snow early on the morning of the 24th.  There was continuous precipitation for a period of 48 hours.  Snowfall totaled 19.0 inches over the city and 20.0 inches at Denver municipal airport.  However… Due to warm temperatures in the 30’s…much of the snow melted as it fell and did not seriously disrupt traffic. The greatest snow accumulation on the ground downtown was 12 inches…but it quickly melted.  The highest sustained wind speed recorded during the storm was 28 mph from the north on the 23rd.  The storm contained 3.16 inches of moisture.

24-25

In 1890…rain changed to snow and totaled 7.0 inches in downtown Denver.

In 1931…heavy snowfall totaled 9.3 inches over downtown Denver.  Winds were light during the storm.

In 1996…the second wind storm in less than a week developed east of the continental divide and spread over metro Denver.  High winds gusted from 60 to 90 mph.  Several power lines and poles were downed.  Some of the stronger wind gusts included:  91 mph atop Squaw Mountain west of Denver…90 mph atop Table Mesa near Boulder…85 mph in Golden Gate Canyon…and 82 mph at Wondervu.  Northwest winds gusted to 41 mph at Denver International Airport on the 25th.

24-26

In 1924…post-frontal rain changed to snow…which became heavy and totaled 10.2 inches over downtown Denver.  The greatest amount of snow on the ground was 6.0 inches on the 25th due to melting.  North winds were sustained to 38 mph with gusts to 42 mph on the 24th.

25

In 1902…northeast winds were sustained to 42 mph with gusts to 48 mph.

In 1908…north winds were sustained to 40 mph behind an apparent cold front.  Snowfall was 0.5 inch.

In 1928…rain changed to snow…which became heavy and totaled 7.4 inches in downtown Denver.  Due to melting…the maximum snow depth on the ground was 4.0 inches at 6:00 pm.  This was the last snow of the season.  Southeast winds were sustained to 19 mph with gusts to 20 mph.

In 1976…a south wind gust to 54 mph was recorded at Stapleton International Airport.  The high winds toppled a 70-foot high cottonwood tree onto the rear of house and a neighboring residence in central Denver.

In 1989…lightning caused heavy damage to a radio transmitter in Parker…knocking a Denver area radio station off the air for 3 hours.

In 1994…weather spotters reported dime-size hail at the intersection of U.S. Highway 287 and C470 in Jefferson County.  Marble-size hail covered the ground near Golden to a depth of 1 inch.  Pea-size hail was reported covering the ground to a depth of 3 inches in Arvada.

In 2016…a severe thunderstorm produced hail up to one inch in diameter near Castle Rock.

25-26

In 1985…a spring storm brought much rain and snow to metro Denver.  The foothills were buried with 15 inches of snow at conifer and 12 inches at Evergreen.  At lower elevations… An inch or more of rain fell in Denver and Boulder.  The heavy precipitation caused brief power outages in the Denver area.  Precipitation totaled 1.06 inches at Stapleton International Airport…including only 0.7 inch of snowfall.

25-27

In 1877…snow ended around 7:00 am on the morning of the 27th… After falling continuously for 48 hours and totaling an estimated 13 inches in the city.  The storm…likely accompanied by strong winds…caused trains to be delayed for 2 to 3 days.  One or two roofs of small buildings were crushed by the weight of the snow…and many tree branches were broken in the city.  There were a number of reports of livestock losses.  One stockman lost 17 horses and several cattle from the snow and cold.  Precipitation totaled 1.30 inches from the storm.

26

In 1965…while only 0.40 inch of rain fell at Stapleton International Airport…some communities in the foothills west of Denver reported over 30 inches of snow from the storm.

In 1972…a spring snow storm accompanied by thunder dumped 15.8 inches of heavy wet snow on metro Denver.  Strong northwest winds gusting to 35 mph produced blowing snow. The storm was quite intense and greatly hampered travel. High winds caused drifts 10 to 15 feet deep in some areas… Blocking roads and stranding hundreds of motorists.  An estimated 500 to 600 people were stranded in the Castle Rock area.  Rescue service was provided by heavy army equipment from Fort Carson.  Power lines were downed…power poles were toppled…and a number of steel towers carrying high voltage power lines were downed.  Some areas northeast of Denver were without power for a week.  A large number of cattle and sheep were killed by the storm.  The greatest snow depth on the ground at Stapleton International Airport was 12 inches.  Warm temperatures following the storm quickly melted the snow.

In 1995…the third major snow storm of the month dumped heavy snow in and near the Front Range foothills.  Six to 12 inches of heavy wet snow fell in the western metro suburbs with the heaviest amounts above 6 thousand feet.  Both Boulder and Golden measured 10 inches of snow.  Only 2.4 inches of snowfall were measured at the site of the former Stapleton International Airport.  North winds gusted 28 mph at Denver International Airport.

In 1998…the last in a series of April storms blanketed the foothills with heavy snow.  Snowfall amounts included:  17 inches near Blackhawk…15 inches at Idaho Springs…14 inches at Georgetown…11 inches near Conifer and Morrison. Only a trace of snow fell at the site of the former Stapleton International Airport.  North winds gusted to 28 mph at Denver International Airport.

26-27

In 1906…rain changed to heavy snow overnight and totaled 7.0 inches over downtown Denver.  North winds were sustained to 16 mph on both days.  Precipitation totaled 2.16 inches.

In 1932…the temperature remained below freezing for more than 30 consecutive hours.  For about 4 of those hours the temperature hovered around 24 to 25 degrees.  At this time some early cherry trees were in bloom and apple and lilac blossoms were beginning to open.  The leaves of many plants were partly unfurled and vegetation in general was correspondingly advanced due to the warm weather from the 11th to the 22nd.  However…there was little apparent injury to foliage and blossoms…but some of the early cherry and apple blossoms were injured.  Rain changed to snow on the 26th and continued intermittently through the 27th.  Snowfall totaled only 2.0 inches and northeast winds gusted to 22 mph on the 26th.

In 1964…strong winds caused damage to buildings…trees…and power lines.  Sustained winds of 37 mph with gusts of 50 to 60 mph were recorded in metro Denver.  West-northwest winds gusted to 44 mph at Stapleton International Airport on the 26th.

» Click here to read the rest of April 25 to May 1: This week in Denver weather history

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