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Thornton, Colorado, USA
UpdatedSun, 28-Aug-2016 7:55am MDT 
 

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Gradually drier, warmer conditions for Thornton’s Friday and weekend

Friday, August 26th, 2016 5:26am MDT

We start out the three-day period with a day similar to yesterday but with warmer temperatures. That will be followed by drier conditions and increasing mercury readings.

For Friday, we start out with a good bit of cloud cover and will see that slowly erode through the day. By this afternoon partly to mostly cloudy skies will be above. Some scattered shower activity will be possible this morning then this afternoon we see a chance for thunderstorms. Temperatures will be warming to a high in the mid to upper 70s.

Saturday continues the warming and drying. Mostly sunny skies will be above as we head for a high in the low to mid-80s. The afternoon will bring just a slight chance for thunderstorms.

High pressure builds on Sunday and that will lead to our warmest day of the period. Highs will be in the mid to upper 80s. At this time, it looks like we will remain dry on that day.

Looking beyond, a high pressure ridge looks to be the dominate feature and that will bring above normal temperatures and dry conditions for at least the first part of the next workweek. Have a great weekend!

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Aftershocks shake central Italy after earthquake that killed 241

Thursday, August 25th, 2016 9:22am MDT

PESCARA DEL TRONTO, Italy — Strong aftershocks shook earthquake-ravaged villages in the mountains of central Italy on Thursday, with rescue teams dodging falling debris and bleary-eyed survivors still holding out hope that loved ones might be found beneath the rubble. The provisional death toll seesawed overnight, first reported to be nearing 250, then revised downward to… » Click here to read the rest of Aftershocks shake central Italy after earthquake that killed 241

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Unsettled, cool weather remains for Thornton’s Thursday

Thursday, August 25th, 2016 5:01am MDT

We managed to eke out a tenth of an inch of rain from yesterday’s showers. Not much but it is better than nothing. Today the weather looks somewhat similar to yesterday with a decent chance for showers but with a bit warmer temperatures.

We start out the day with mostly sunny skies above followed by a gradual increase in cloud cover as the day progresses. The sun we do get will help warm us to a high in the mid-70s.

After noon we begin to see slight chances for showers and thunderstorms. As the afternoon progresses, chances increase with the best opportunity coming from 4:00pm into tonight.

Keep an eye on the sky with our radar here.

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ESO Discovers Earth-Size Planet in Habitable Zone of Nearest Star

Wednesday, August 24th, 2016 6:05pm MDT

A newly discovered, roughly Earth-sized planet orbiting our nearest neighboring star might be habitable, according to a team of astronomers using the European Southern Observatory’s 3.6-meter telescope at La Silla, Chile, along with other telescopes around the world. The exoplanet is at a distance from its star that allows temperatures mild enough for liquid water to… » Click here to read the rest of ESO Discovers Earth-Size Planet in Habitable Zone of Nearest Star

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August 21 to August 27: This week in Denver weather history

Wednesday, August 24th, 2016 1:51pm MDT
This Week In Denver Weather History

August 21 to August 27: This week in Denver weather history

Denver’s weather is not often boring. Lightning, hail, tornadoes and even swarms of grasshoppers have made appearances this week in Denver weather history.

From the National Weather Service:

19-30

In 1875…grasshoppers appeared in great numbers at 10:00 am on the 19th. Thousands landed on the ground. The streets were literally covered with them. Swarms of grasshoppers were seen on each day. All gardens in the city were devastated…and in the countryside the grasshoppers were very destructive to ripened grain. On the 30th the grasshoppers were so numerous as to almost darken the sun.

21

In 1876…heavy thunderstorm rain and hail struck the city. Hail stones as large as partridge eggs accumulated to a depth of 1 1/2 feet over eastern portions of the city. The heavy rainfall flooded streets and gutters. However… No significant damage was reported. Rainfall totaled 0.85 inch in central Denver.

In 1903…a thunderstorm produced west winds sustained to 42 mph with gusts to 48 mph.

In 1957…heavy thunderstorm rainfall and hail over the bear creek basin flooded portions of State Highway 8 in and near Morrison. There was also minor property damage in Morrison.

In 1995…a 68-year-old woman was struck by lightning while standing near a tree in Brighton.

In 2006…a severe thunderstorm produced 7/8 inch diameter hail in Franktown.

22

In 1898…an apparent thunderstorm produced southwest sustained winds to 40 mph with gusts to 43 mph.

In 1903…a late afternoon thunderstorm produced rain…hail… And east winds sustained to 40 mph with gusts to 44 mph.

In 1904…the lowest recorded temperature in August…40 degrees…occurred. The same temperature also occurred on three consecutive days…August 24…25…and 26 in 1910.

In 1965…heavy rain and hail caused some damage from flooding over northern Douglas County from Castle Rock to Franktown.

In 1981…thunderstorms moved across metro Denver. At least 5 funnel cloud sightings were reported. Funnel clouds were seen at 96th Ave. and Sheridan Blvd. And at 92nd Ave. and Federal Blvd. in Westminster and 7 miles north of Stapleton International Airport. Lightning injured two people in Boulder. A quarter inch of rain fell in just 5 minutes in Brighton. Up to 3/4 inch of rain doused Parker in 30 minutes.

In 1983…3/4 inch diameter hail was reported at Kittredge… Along with 0.60 inch of rain in 25 minutes.

In 1984…a thunderstorm dumped 4 inches of rain on Brighton in 90 minutes…causing extensive street flooding in the downtown area.

In 1987…over an inch of rain fell in 24 hours throughout most of metro Denver. A public library suffered water damage to the ceiling…carpet…and a few books. Rainfall was 0.76 inch at Stapleton International Airport.

In 1990…lightning knocked out power to about 2500 homes in Lakewood for about an hour.

In 1991…National Weather Service personnel at Stapleton International Airport sighted an apparent tornado briefly on the ground 3 miles west-northwest of the airport. No damage was reported.

In 1995…lightning struck 3 electrical power substations in Louisville. Residences of more than 4500 people were without power from 30 minutes to more than an hour.

In 1996…between 1 and 3 inches of rain fell across metro Denver. As a result…several low lying areas were flooded. A bicyclist was swept into a fast moving creek when he tried to cross a flooded bike path. The man was washed downstream about 15 feet before getting snagged by a tree stump. He and a man who tried to rescue him received minor injuries. The heavy rain caused numerous power outages…false fire alarms…and traffic accidents. In Lakewood…telephone service to around 60 thousand residents was knocked out when a switching center was flooded. Funnel clouds were sighted near Chatfield Reservoir and Highlands Ranch.

In 2000…lightning sparked a blaze which gutted a 10-unit apartment building in Highlands Ranch. Twenty-eight people were left homeless. Damage was estimated at 2 million dollars.

In 2007…severe thunderstorms produced large hail…up to 1 1/4 inches in diameter…in the vicinities of Castle Rock… Elizabeth and Franktown.

In 2013…flash flooding occurred in central Douglas County with numerous road closures reported. One of the closures occurred at the Tomah Road exit along I-25…south of Castle Rock.  The closure backed up all I-25 the way to Castle Rock. At Denver International Airport…1.94 inches of precipitation was recorded…which set a new record rainfall for the date. The old record was 0.75 inches… set back in 1953.

22-24

In 1987…some locations in metro Denver had a total 3-day rainfall of 2 to 4 inches. Rainfall totaled 0.96 inch at Stapleton International Airport.

23

In 1900…northwest winds were sustained to 42 mph with gusts to 49 mph.

In 1921…a thunderstorm cloudburst produced 2.20 inches of rainfall in an hour over downtown Denver. This is the greatest 1 hour rainfall on record at the official observing site in the city. Precipitation totaled 2.93 inches…which is the greatest calendar day precipitation ever recorded in August.

In 1941…one man was killed by lightning about 2 miles from the official weather station in downtown Denver.

In 1962…a home near Boulder was destroyed by a lightning- caused fire.

In 1968…strong winds buffeted Boulder briefly during the early morning hours. At the National Center for Atmospheric Research…winds averaged 55 mph with gusts to 85 mph. Damage was minor. Northwest winds gusted to 31 mph at Stapleton International Airport.

In 1977…lightning damaged at least 6 homes in Aurora.

In 2008…a landspout touched down near Westcreek in Douglas County. One man was seriously injured when he tried to escaped several falling trees in his ATV. One of the trees struck his back and broke two vertebra. Another camper narrowly escaped injury. Seconds after he back up his truck…a tree came down where it had been parked.

24

In 1880…a thunderstorm produced vivid lightning and heavy rainfall…which caused flooding over the eastern part of the city including the brick yards. There was no rainfall recorded in downtown Denver.

In 1910…an apparent dry cold front caused a remarkable drop in temperature. From 3:00 pm until midnight the temperature fell from a high of 93 degrees to a low of 40 degrees. Northeast winds were sustained to 44 mph during the late afternoon.

In 1946…heavy rain near Idledale caused flooding on bear creek at Morrison…which resulted in one death when a woman was swept from her stranded car and drowned.

In 1973…strong winds blew down a few power lines and hail up to 3/4 inch diameter fell in southeast Aurora.

In 1984…heavy rain hit the south Denver area. Over an inch fell in less than an hour at both Castle Rock and Sedalia.

In 1992…heavy rains caused flash flooding across parts of metro Denver. Rainfall amounts of 1 to 3 inches fell with the hardest hit areas being the southwest and central parts of metro Denver. Bear Creek rose above bankfull near Idledale with flood waters moving into southwest metro Denver. Mud and rock slides along Colorado highway 74 west of Morrison were reported. The confluence of Cherry Creek and the South Platte River in downtown Denver also went out of its banks…flooding bike paths. Rainfall totaled 1.98 inches at Stapleton International Airport where light to moderate rain fell most of the day. Heavy rain and fog briefly reduced the surface visibility to 1 1/2 miles. The temperature climbed to a high of only 58 degrees…which was a record low maximum for the date.

In 2002…hail to 7/8 inch in diameter was measured in southwest Denver.

In 2008…several landspout tornadoes developed along a boundary to the southeast of the Denver metropolitan area during the Democratic National Convention. In northwest Elbert County… Minor damage was reported. The damage consisted of downed power lines…broken windows and an out building. Severe thunderstorms also produced very heavy rain and large hail… Up to one inch in diameter. In southwest Douglas County… Heavy rain caused flash flooding near the town of Westcreek. A mudslide closed State Highway 67. The road in the YMCA camp shady brook was also washed out and some bridges were damaged.

24-26

In 1910…the lowest temperature ever recorded in August…40 degrees…occurred on each of these days and on August 22… 1904. The unusually cold weather for so early in the season brought sub-freezing minimum temperatures to much of the Colorado northeastern plains.

25

In 1951…a microburst produced a southwest wind gust to 50 mph at Stapleton Airport. Only a trace of rain was observed.

In 1964…thunderstorm winds gusted to 59 mph and caused some blowing dust at Stapleton International Airport.

In 1994…lightning struck a power pole in Louisville and caused a two-hour power outage.

In 2008…an unoccupied home was struck by lightning in Aurora… Causing 75 thousand dollars in damage to the roof.

26

In 1944…one of the most destructive hailstorms in the city in a decade caused damage estimated at nearly one million dollars. The storm occurred within a period of 10 to 30 minutes…between 2:00 pm and 3:00 pm. The hail varied in size from very small to as large as 1 1/2 inches in diameter. Hail covered the ground to a depth of 5 to 6 inches in some sections of the city. Several people were cut by broken glass. The hail and heavy rain flooded underpasses to a depth of 6 feet…and the occupants of stalled autos had to be rescued. Sewers were unable to handle the sudden amount of water and water backed up and flooded a number of basements. A few first floors of buildings were flooded. The water department had a busy time replacing manhole covers that had been displaced by the water pressure. Trees were stripped…one was severely broken…and telephone lines were downed. Roofs…windows… Automobiles…awnings…and gardens were severely damaged. Flowers and gardens in some sections of the city were a total loss. Greenhouses were extensively broken with an estimated 20 carloads of glass shattered. Vegetable and truck crops in and around the city were severely shredded. The next day the American Red Cross was designated by the War Agency to grant any and all priorities needed to obtain materials and supplies to replace and repair the damage. In downtown Denver…the thunderstorm produced 0.95 inch of rain and heavy hail along with sustained northwest winds to 25 mph.

In 1961…strong winds blew in the walls of a warehouse under construction in Denver. Two workmen suffered a fractured foot and body bruises.

In 2014…two men in central Denver were struck by lightning as they sat under a tree to avoid a heavy downpour. One of the men was unconscious and had no pulse when emergency responders arrived. He was immediately taken to Denver Health was listed in critical condition. The other victim suffered less severe injuries. He was treated at the scene and hospitalized…then released a few hours later.

» Click here to read the rest of August 21 to August 27: This week in Denver weather history

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August 2016 top shots: Monthly photo slideshow

Wednesday, August 24th, 2016 1:00pm MDT
August 11, 2016 - An evening thunderstorm brings a gorgeous rainbow. (Shannon Dizmang)

August 11, 2016 – An evening thunderstorm brings a gorgeous rainbow. (Shannon Dizmang)

As the calendar turns to August, the summertime heat begins to fade and that makes it easier to get out and enjoy all of the outdoor activities Colorado has to offer.  From a walk in a park to afternoon thunderstorms to an abundance of wildlife, photo opportunities abound as is seen in our slideshow.

Our monsoon season typically arrives about now and that means better chances for moisture.  However with limited instability, the intensity of storms are more sedate.  That doesn’t mean however that the weather is any less photographic.

  • Slideshow updated August 21, 2016

By the end of the month some of our seasonal feathered friends will be looking to leave the state giving our last chance to see them till spring.  Larger mammals are gearing up for the rut (mating season) and that can make for some intense scenes.

Showcasing images captured by ThorntonWeather.com readers as well as some of our own, our monthly slideshow covers the entire gamut of weather and nature related imagery. Sunsets, sunrises, wildlife and of course every type of weather condition are vividly depicted.

To learn more about how to send your photo to us for inclusion in the slideshow, see below the slideshow.

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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At least 37 dead after devastating quake hits central Italy

Wednesday, August 24th, 2016 10:33am MDT

AMATRICE, Italy — A devastating earthquake rocked central Italy early Wednesday, collapsing homes on top of residents as they slept. At least 37 people were killed in hard-hit towns where rescue crews raced to dig survivors out of the rubble, but the toll was likely to rise as crews reached homes in more remote hamlets. “The… » Click here to read the rest of At least 37 dead after devastating quake hits central Italy

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Relief arrives in the form of cooler temps, possibly damp conditions

Wednesday, August 24th, 2016 5:15am MDT

With the passage of a cold front and a trough digging in, Thornton will see notable changes in our weather Wednesday. The mercury will stay some 10 degrees below normal and maybe, just maybe, we will see some precipitation.

Mostly cloudy skies will be above throughout the day today. Look for highs to top out in the mid-70s, well below the average of 86 degrees for the date.

Some light showers will be possible this morning with the best chances coming between 9:00am and 11:00am. Then, this afternoon, heating should help bump up instability and bring chances for thunderstorms, particularly after 4:00pm. Unfortunately there isn’t a whole lot of moisture with this system but with any luck we will eek out something measurable.

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Tuesday brings cooler temperatures, slight chance for storms

Tuesday, August 23rd, 2016 5:17am MDT

We begin to see a change in the overall weather pattern today with the passage of a cold front. That is going to lead to temperatures right near normal and a bit of a chance for showers later.

We start out with mostly sunny skies that will be with us for the first part of the morning. Cloud cover will then build as the front approaches. As the front pushes through in the early to mid-afternoon, wind speeds will increase and become breezy into the evening.

Temperatures will be topping out today right around the average for the date of 86 degrees. That will occur in the early afternoon then we will see decreasing temps with the passage of the front.

As far as thunderstorms go, we see just a slight chance from about 3:00pm through the night. Any that do form are expected to bring mainly gusty winds, lightning and perhaps a bit of rain. Live radar.

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The heat is on for Thornton’s Monday

Monday, August 22nd, 2016 5:00am MDT

We are set to have our hottest day of the week right off the bat today. The good news is though that we will then see mercury readings near normal tomorrow and then cool down nicely for the balance of the week.

For today we kick things off with mostly sunny skies. There will be some increase in cloud cover by mid-morning but still with a good bit of sun for the balance of the day. Temperatures will be climbing to a high of around 93 degrees, well above the average for the date of 86 degrees.

Daytime hours should be dry and calm. This evening we expect a bit of an uptick in moisture and that will bring just a slight chance for thunderstorms after about 6:00pm.

As for the rest of the week, check out the extended weather forecast here.

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