Thornton, Colorado, USA
UpdatedThu, 19-Jul-2018 7:40am MDT 


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Thornton’s April 2018 preview: Winter, spring and summer all in one month

Sunday, April 1st, 2018 7:09am MDT

Thornton's April weather previewApril 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!

For good measure throw in a chance for hail and even dust storms and April gives every type of weather condition you could like – or hate.

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March 2018 top shots: Monthly photo slideshow

Saturday, March 31st, 2018 6:00pm MDT
A gorgeous late winter's day in Thornton. (LE Worley)

A gorgeous late winter’s day in Thornton. (LE Worley)

The month of March is the start of meteorological spring and while conditions do begin warming, winter weather is certainly out of the question.  From hot to cold, snow to rain, the conditions can be very conducive to great pictures as we see in our slideshow.

March in Denver typically means frequent and rapid weather changes. The days grow longer and we start enjoying more sunshine and sometimes summer-like weather. However, on occasion arctic air masses can still force their way south into Colorado dropping temperatures quickly and markedly.

With the active wildlife, increased outdoor activities by us humans, and of course the weather, March imagery contains a wide variety of subjects and extremes.

  • Slideshow updated March 31, 2018. 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 weather to offer largely seasonal, calm conditions

Friday, March 30th, 2018 5:24am MDT

We have a pretty nice looking three-day period in store. It does start out breezy but will settle down for Saturday and Sunday with temperatures at or above normal.

For Friday, partly sunny skies will be above throughout the day. Temperatures will climb to a high in the low to mid-60s, a good bit above normal. The most notable feature today will be breezy winds that will start up around noon and continue into tonight. Overnight tonight, winds will ease after midnight and low temperatures will drop to near freezing.

Tomorrow, a cold front will cool things down but offer little else in terms of weather excitement. Partly sunny skies will be above and high temperatures will top out in the mid-50s. Saturday night into Sunday morning, mostly cloudy skies will be above with lows around 30 degrees.

Easter Sunday looks to be the most pleasant of the three days. Mostly sunny skies will be above with highs reaching the mid-60s.

Have a great weekend!

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Thornton’s Thursday to offer calm, cool conditions

Thursday, March 29th, 2018 5:45am MDT

It wasn’t much but yesterday afternoon’s storm brought us 1.1 inches of snow and much-needed moisture. Today we dry out and will see calm and dry conditions but with temps a bit cooler than normal.

We start out the day with some patchy fog in a few spots but that won’t last long. Skies are going to be mostly to partly sunny throughout the day. Look for highs to top out in the low 50s, below the average high for the date of 58 degrees.

Tonight, skies will be partly clear with lows dipping to around the 30 degree mark.

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Weather system to keep things cool, bring another chance for rain and snow Wednesday

Wednesday, March 28th, 2018 5:52am MDT

A somewhat unsettled day of weather for Thornton today. The day starts out relatively nice but a storm system is moving in that will bring colder temperatures and a chance for precipitation later today.

We start out with partly sunny skies but then will see increasing clouds as the morning progresses. Winds will be out the northeast and north. We will see another day with below normal temperatures as highs will only reach the low 50s.

As for precipitation, some light rain showers may be possible in the first part of the afternoon with the best chances coming after 4:00pm. As temperatures drop this evening, a transition to snow should occur, possible bringing us another inch or two of the white stuff between 7:00pm and tomorrow AM.

Tonight, lows will be in the mid to upper 20s.

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Following overnight snow, Thornton dries out and clears up

Tuesday, March 27th, 2018 5:44am MDT

A nice little bit of snow last night and early this morning as Thornton received 1.9 inches of very wet stuff. Today, we will dry out and see skies clear although it will remain a bit cool.

We start out with mostly cloudy skies but as the storm system moves out, skies will begin to clear and by the end of the day we will have mostly sunny skies above. Winds will be light and out of the southeast.

Look for high temperatures today to recover to around the 50 degree mark. The average high for today’s date is 57 degrees.

Tonight, skies remain mostly clear with lows a bit below freezing.

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March 25 to March 31: This week in Denver weather history

Monday, March 26th, 2018 5:15am MDT
This week in Denver weather history

March 25 to March 31: This week in Denver weather history

March is one of our snowiest months and our look back at this week in Denver weather history shows a number of notable snowfall events.

From the National Weather Service:


In 1891…rain changed to snow and totaled 8.8 inches in downtown Denver. Most of the snow fell on the 24th. Winds were light.

In 1964…heavy snowfall of 5.8 inches was measured at Stapleton International Airport. North-northeast winds gusted to 21 mph behind a cold front.


In 1904…west Bora winds sustained to 40 mph with gusts to 55 mph warmed the temperature to a high of 49 degrees on the 24th. Overnight…a cold front produced 4.5 inches of snow. The high temperature was only 34 degrees on the 25th.

In 1955…a vigorous cold front with winds sustained to 34 mph and gusts to 39 mph briefly reduced the visibility to 2 miles in blowing dust at Stapleton Airport. Post-frontal heavy snowfall totaled 9.5 inches at Stapleton Airport where the maximum snow depth on the ground was 7 inches.


In 1959…the second major spring storm in less than a week dumped 10 to 20 inches of wet snow across northeastern Colorado. Snowfall totaled 14.3 inches at Stapleton Airport where north winds gusted to 36 mph…causing near- blizzard conditions with visibilities frequently reduced to 1/2 mile in snow and blowing snow. Many travelers were marooned when trains…planes…and buses were unable to make their schedules. Utility lines were again damaged as a result of the storm.


In 1874…the wind blowing in gusts from the west-northwest filled the air with dust so dense that only the houses in the immediate neighborhood of the weather station could be recognized. The brisk winds continued through the afternoon.

In 1886…heavy snowfall of 6.5 inches occurred in the city.

In 1896…northwest winds sustained to 58 mph with gusts to 65 mph warmed the temperature to a high of 70 degrees.

In 1911…west winds were sustained to 43 mph. The Chinook winds warmed the temperature to a high of 65 degrees.

In 1925…northwest winds were sustained to 41 mph with gusts to 46 mph.

In 1950…strong Chinook winds gusted to 50 mph at Stapleton Airport.

In 1976…3.4 inches of snow fell at Stapleton International Airport where northeast winds gusted to 46 mph. The strong winds at 20 to 35 mph all day produced a rare “snirt” storm when blowing dust and dirt became mixed with snow and blowing snow reducing the visibility to as low as 1/4 mile at Stapleton International Airport.

In 1984…1 to 4 inches of new snow fell across metro Denver. Icy roads contributed to many accidents. The most hazardous conditions occurred in the foothills west of Denver. Both I-70 and U.S. 40 were closed at the height of the Sunday afternoon ski rush…causing delays of many hours. Snowfall totaled only 1.0 inch at Stapleton International Airport with only a trace on the ground due to melting.

In 1988…high winds in the mountains spread over metro Denver. A wind gust to 75 mph was noted in Boulder where a traffic light was downed. Power outages were reported in Boulder County. Northwest winds to 46 mph were recorded at Stapleton International Airport.


In 1899…a major storm dumped 13.1 inches of heavy snow over downtown Denver. Rain changed to snow around mid- morning on the 25th. Snowfall became heavy and continued until late evening on the 26th. North to northeast winds gusted to 30 mph on both days. The cold air mass plunged temperatures from a high of 55 degrees on the 25th to a low of 8 degrees on the 26th.

In 1995…a potent early spring storm produced heavy snow in the mountains…but skipped over metro Denver…before producing blizzard conditions and 6-foot drifts over eastern Colorado…causing the closure of I-70 and other highways. Only 0.7 inch of snow fell at the site of the former Stapleton International Airport. North winds gusted to 40 mph at Denver International Airport on the 25th.

In 2001…a persistent band of moderate to heavy snow showers with a few embedded thunderstorms formed in the foothills around Estes Park and spread to the southeast across Boulder and Denver and on the plains to the east of Denver. Thunder and snow was reported at Jefferson County…Centennial…and Denver International Airport during the evening of the 25th. Snowfall totals included: 7 inches at Boulder and Louisville; 6 inches at Broomfield…Niwot…and Westminster; 5 inches at Eldorado Springs…Nederland…and near Strasburg. Only 2.1 inches of snow fell at the site of the former Stapleton International Airport.


In 1904…heavy snowfall totaled 7.0 inches in downtown Denver.


In 1899…a major winter storm dumped 11.3 inches of snow over downtown Denver.

In 1910…west winds were sustained to 42 mph. A snow shower produced a trace of snow.

In 1935…a severe dust storm swept across the city. The dense dust blew in on a gale from the east-northeast. The dust “bank” was first visible on the northeastern horizon at about 2:00 pm. It advanced toward the city as a rolling…swirling…yellowish-to smoke-black cloud. At 2:06 pm…the cloud of dust enveloped the station. Before the storm the visibility was unlimited. At 2:08 pm…the visibility was reduced to 1/8th mile. By 2:25 pm…the visibility was increasing and was above 1000 feet at 3:10 pm. Thereafter…the sun appeared as a dim “ball of fire” at times. The dust was partially gone at 8:30 pm. During the storm…northeast winds were sustained to 32 mph with gusts as high as 35 mph.

In 1971…the highest recorded temperature in March…84 degrees…occurred. This was the highest temperature recorded so early in the season. Previously…84 degrees had not been reached until April 21st. The temperature also exceeded the previous daily record of 75 degrees set in 1960. Strong northwest Chinook winds gusting to 37 mph at Stapleton International Airport were partially responsible for causing the extremely warm weather so early in the season.

In 1985…strong winds occurred along the foothills. A wind gust to 76 mph was recorded in Boulder. A dust storm produced by the strong winds caused a 35-car pileup on I-25 north of Denver. In Denver…the high winds blew out windows in a few downtown buildings. West winds gusted to 52 mph at Stapleton International Airport.

In 1993…strong winds from high based thunderstorms blew a roof off an Englewood business onto several parked cars. The winds also caused half of a furniture warehouse roof to collapse in north Denver…ripped a mechanical shed off the roof of a building in downtown Denver…and downed power lines in Commerce City. Wind gusts ranging from 55 to 68 mph were recorded. At Stapleton International Airport… Where no thunder was heard…a microburst wind gust to 55 mph briefly reduced the visibility to zero in blowing dust.

In 1994…heavy snow fell in the foothills west of Denver and over the palmer divide to the south of metro Denver. Snowfall totaled 11 inches at both the Eldora Ski Area and at Idaho Springs. Only 1.3 inches of snowfall were measured at Stapleton International Airport where north winds gusted to 28 mph.

In 2006…post-frontal strong winds quickly dissipated the dense morning fog across metro Denver. West to northwest winds were strong and gusty from mid-morning until sunset. West winds were sustained to 37 mph with gusts to 52 mph at Denver International Airport.


In 1886…heavy snowfall totaled 7.1 inches in downtown Denver.

In 1911…post-frontal north winds were sustained to 48 mph on the 26th and to 47 mph on the 27th.

In 1931…a cold front brought snow and very cold weather to the city. Snowfall totaled 7.3 inches over downtown Denver with most of the snow…6.4 inches…occurring on the 26th… When northwest winds were sustained to 38 mph with gusts to 44 mph. High temperature of 31 degrees on the 26th equaled the low temperature of the previous day as the temperature plunged to a low of 1 degree below zero. High temperature of only 15 degrees on the 27th was a record low maximum for the date. Low temperature of 2 degrees below zero on the 27th was not a record.

In 1975…a major pre-Easter blizzard…the worst since the vicious storm of 1949…battered northeastern Colorado and left livestock losses in millions of dollars…but metro Denver escaped the main brunt of the storm and received only 5.0 inches of snowfall. North winds gusted to 38 mph at Stapleton International Airport where temperatures plunged from a high of 50 degrees to 18 degrees by midnight on the 26th.

In 1991…heavy snow fell over portions of the eastern foothills with 9 inches recorded at Lake Eldora west of Boulder. The snow spread across metro Denver…but snowfall totaled only 1.7 inches at Stapleton International Airport where north to northeast winds gusting to 31 mph on both days produced some blowing snow.

27 » Click here to read the rest of March 25 to March 31: This week in Denver weather history

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Thornton’s workweek starts off with cooler, unsettled weather conditions

Monday, March 26th, 2018 5:07am MDT

Following on a pretty darned nice weekend, Monday brings a change in the weather as a storm system passes by. Temperatures cool down to a bit below normal and we see a decent chance for some rain and perhaps snow.

The day starts out with mostly cloudy skies, some areas of patchy fog particularly to the east. Cloud cover will ease for a bit later this morning but then build back up by late afternoon. Winds will be out of the northeast and become breezy later in the afternoon and evening. It will be a good bit cooler today with highs only expected to reach the low 50s.

As for precipitation, the afternoon brings a chance for rain with the best opportunity coming after 5:00pm. With temperatures dropping considerably after that, we then are expecting snow from about 8:00pm to midnight then things will ease up. There is the potential for an inch or two of the white stuff overnight tonight. As with all spring storms, there is a lot of variability in the potential so it could be more, could be less.

Low temperatures tonight dip to a bit below the freezing mark.

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Thornton to see unseasonably warm weekend temperatures, some wind

Friday, March 23rd, 2018 4:57am MDT

The first weekend of spring looks to offer some very warm temperatures and overall nice conditions. There will however be some periods of wind.

For Friday, we start out with mostly clear skies and should see the same through the day. Temperatures will climb to a high in the low 70s, well above average. The one problem with today’s weather will be the wind. Look for speeds to increase later this morning and become quite windy in the afternoon and evening.

Things will settle down after dark. Tonight, skies remain mostly clear with lows in the mid-30s.

Saturday will continue the mild temperatures with highs near the 70 degree mark. Mostly sunny skies start things off followed by an increase in PM cloud cover. Winds will be a bit breezy in the afternoon and evening.

Saturday night into Sunday morning, there will be a good bit of cloud cover initially then clearing skies. Lows Sunday morning will be in the upper 30s.

The weekend closes out on Sunday with another nice day. Mostly sunny skies will be above with highs in the upper 60s.

Have a great weekend!

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National Weather Service announces storm spotter training dates for 2018

Thursday, March 22nd, 2018 8:16am MDT

On June 3, 1981 a tornado struck Thornton in what is the worst twister to have struck the Denver metro area. Are you ready should disaster strike again? Image courtesy the City of Thornton archives.

Severe weather is a fact of life in Colorado – from blizzards to tornadoes we can and do see it all.  Each year the weather is responsible for claiming lives in our state and across the nation and the threat is very real.  Storm spotter training allows you to learn how to protect yourself and your family while providing a public service.

Education is key to knowing how to protect you and your family.  Whether you want to be an official storm spotter or maybe just want to learn more about severe weather, storm spotter training can provide you an incredible opportunity to learn.

The National Weather Service Denver / Boulder office has announced a series of Skywarn storm spotter training dates for Colorado for the 2017 season.

The storm spotter program is a nationwide program with more than 280,000 trained spotters.  These volunteers report weather hazards to their local National Weather Service office providing vital information when severe strikes.  Data from spotters include severe wind, rain, snow measurements, thunderstorms and hail and of course tornadoes.

Storm spotters are part of the ranks of citizens who form the Nation’s first line of defense against severe weather. There can be no finer reward than to know that their efforts have given communities the precious gift of time–seconds and minutes that can help save lives.

By completing one of these training classes you can become an official storm spotter.  When severe weather strikes, you can report it by calling a special toll free number or submit your report via the National Weather Service’s website.

These are great sessions for anyone wanting to learn more about the severe weather we experience in Colorado, whether you want to be an official spotter or not.  All training is free.  Topics include:

  • Basics of thunderstorm development
  • Fundamentals of storm structure
  • Identifying potential severe weather features
  • Information to report
  • How to report information
  • Basic severe weather safety

To learn more about the program, see here: http://www.crh.noaa.gov/bou/awebphp/spotter.php

Below are the dates, times and locations announced thus far.  The embedded calendar should automatically update with new dates and changes but be sure to check the National Weather Service site for the latest.

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