Thornton, Colorado, USA
UpdatedMon, 02-Mar-2015 12:05am MST 


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March preview: Snowiest month also typically brings much warmer temperatures

Saturday, February 28th, 2015 6:25am MST

The month of February was quite generous in terms of snowfall pushing our seasonal total thus far above normal.  The month of March usually offers healthy snowfall giving us an opportunity to add to those numbers.  While there is good snow potential in March, the month also typically brings much warmer temperatures.

March is historically Denver’s snowiest month and brings about 20% of our annual snowfall.  Heavy, wet spring snow storms can oftentimes bring the entire month’s snowfall total in one monstrous snow.

We also start the transition to spring and severe weather season and the month typically brings our first thunderstorms of the year.  Temperatures climb throughout the month and by the end our average daytime highs are near 60 degrees.

For a complete look at what lies ahead in March 2014, click here.

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Weekend to bring continued cold, periods of light snow

Friday, February 27th, 2015 5:35am MST

If you’re tired of the cold and snow you may wish to stop reading as those conditions are going to remain not only through this weekend but likely through much of next week.  In fact, right now it looks like it could be NEXT weekend before temperatures approach normal.

For your Friday, a few light flurries will be possible early this morning then we will dry out for the daytime hours.  Partly sunny skies will be above but temperatures are going to remain quite cold with today’s high expected to reach only 20 degrees.  This evening and overnight there is a slight chance for light snow but little if any accumulation is expected.

Saturday will be cloudy for the better part of the day and temperatures will be staying in the low to mid-20s.  Snow will be possible throughout the day with the best chances coming in the afternoon and the evening through the night.  Only light accumulations are expected – around an inch or so.

For Sunday, cold temperatures and overcast skies remain as does a chance for some light snow but with minimal accumulation.  Looking ahead, we just aren’t seeing any real opportunity to break out of this pattern.

The first half of the week will see more of the same.  A storm system expected to arrive Tuesday / Wednesday has the potential to bring significant snowfall however models are not in agreement on solutions for that one.  We will know more as it gets closer.  In the meantime, bundle up and stay warm!

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Very cold temperatures, light snow for Thornton’s Thursday

Thursday, February 26th, 2015 5:26am MST

Hopefully you’re not already burnt out on cold and snow.  Following last night’s healthy shot of the white stuff, the cold and periods of snow will be hanging around through this weekend.

The snow that began yesterday afternoon and lasted into the night totaled 5.8 inches here in Thornton.  That brings our February total to 25.2 inches – far above normal for the month.

For today, some flurries will be possible through the morning hours.  Once again, by the time the evening rush hour arrives we expect a bit greater coverage and increased accumulations.  Between this morning and Friday AM look for an inch or two additional snow on the ground with most of that coming from 4:00pm this afternoon to midnight tonight.

In addition to the snow, cold is a big part of today’s weather story.  Highs today are only going to reach the mid to upper teens with overnight lows tonight well into the single digits.

Temperatures well below normal – and below freezing – are expected to stay through the weekend.  Periods of light snow will also be possible, especially Saturday night.  Get a look at the extended forecast here.

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February 2015 top shots: Monthly photo slideshow

Thursday, February 26th, 2015 5:00am MST
February 5, 2015 - The day ends with a gorgeous sunset. (Michelle Jones)

February 5, 2015 – The day ends with a gorgeous sunset. (Michelle Jones)

February signifies the start of the climb toward warmer temperatures for the year.  Cold and snow though do intrude but, coupled with milder conditions, there are lots of photo opportunities as can be seen in our monthly slideshow.

The month is one of our least snowiest of the year but it isn’t unusual to see the landscape blanketed in white.  Warming temperatures through the month can bring the onset of spring fever and gives residents the opportunity to enjoy some prolonged time outdoors on the mild days.  Cold or mild, snowy or dry, our scenery is almost always gorgeous.

  • Slideshow updated February 26, 2015
  • 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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February 22 to February 28: This week in Denver weather history

Wednesday, February 25th, 2015 5:00pm MST
This Week In Denver Weather History

February 22 to February 28: This week in Denver weather history

Our look back at this week in Denver weather history contains much of what you would expect to see this time of year – high winds, snow storms, and cold but also a rare February thunderstorm.
From the National Weather Service:


In 1909…a major storm dumped 12.9 inches of heavy snowfall over the city. North winds were sustained to 37 mph on the 22nd. Temperatures during the storm hovered in the 20’s.


In 1893…northwest winds were sustained to 36 mph with gusts to 50 mph.

In 1900…northwest winds sustained to 40 mph with gusts to 45 mph warmed the temperature to a high of 61 degrees.

In 1910…a cold front caused a remarkably sharp drop in temperature from 43 degrees at 3:00 am to only 3 degrees at 8:30 am. These were the high and low temperatures for the day. Early west winds switched to northeast behind the front.

In 1927…west winds were sustained to 42 mph with a measured maximum velocity to 60 mph.

In 1954…strong and gusty west winds persisted throughout the day. The highest wind gust recorded at Stapleton Airport was 58 mph.

In 1960…snowfall totaled 5.9 inches…producing near-blizzard conditions in snow and blowing snow at Stapleton Airport where northeast wind gusts to 40 mph reduced visibility to 1/2 mile.

In 1986…high winds occurred in the foothills. Wind gusts of 65 to 70 mph were reported at Golden Gate Canyon…and a peak gust of 83 mph was recorded at Echo Lake. Northwest winds gusted to only 29 mph at Stapleton International Airport.

In 1988…a wind gust to 83 mph was recorded in Boulder with 80 mph clocked at Rollinsville. Northwest winds gusted to 45 mph at Stapleton International Airport.

In 1996…wind gusts to 63 mph were reported in western Elbert County. Southwest winds gusted to 45 mph at Denver International Airport.

In 1999…strong post-frontal…bora winds developed over the foothills and spread over the northeast plains. Peak wind gusts included: 87 mph at Golden Gate Canyon; 84 mph at Wondervu; 80 mph at the National Center for Atmospheric Research mesa lab; 75 mph at the Rocky Flats Environmental Test Facility; 74 mph at Jefferson County Airport near Broomfield; 72 mph at the Gamow Tower on the University of Colorado campus in Boulder; and 60 mph at Bennett. West to northwest winds gusted to 44 mph at Denver International Airport.

In 2000…thunder was heard across much of metro Denver. Thunderstorms over southwest metro Denver produced 1/4 to 1/2 inch diameter hail at Pinehurst Country Club. A thunderstorm at Denver International Airport produced wind gusts to 34 mph. This was only the 6th time since 1891 that thunder had been reported in February.


In 1985…a snowstorm struck the eastern foothills with 8 to 15 inches of new snow. Three to 7 inches of new snow fell across metro Denver and parts of I-70 were closed at times. Snowfall totaled only 3.3 inches at Stapleton International Airport where northeast wind gusts to 29 mph were recorded.

In 1992…a snow storm dumped heavy snow in the Front Range foothills. Conifer received 12 inches of new snow with 7.5 inches at Aspen Springs. Snow only dusted the plains and metro Denver…but winds were strong with a gust to 43 mph from the north at Stapleton International Airport where snowfall totaled only 0.3 inch. This was the only measurable snowfall of the month…equaling the record for the least snowiest February first set in 1970. Rare thunder for February accompanied the snow during the early morning hours of the 23rd.

In 1999…strong Chinook winds developed on a very localized scale overnight in and near the foothills of northern Jefferson and southern Boulder counties. Peak wind reports included: 82 mph at the Rocky Flats Environmental Test Facility…80 mph at the National Center for Atmospheric Research mesa lab in Boulder…77 mph near Nederland…and 75 mph atop the Gamow Tower on the University of Colorado campus in Boulder.

In 2012…a strong upper level jet stream produced high winds along the Front Range. In Boulder…the strong winds snapped power poles and toppled trees. As a result…about 7 thousand Xcel Energy customers were without power for several hours. The high winds overturned a tractor-trailer on foothills highway overpass…north of Valmont road. The driver suffered minor injuries. A parked car was totaled when it was crushed by a fallen tree near the university of Boulder. The strong winds were also responsible for two Boulder County wildfires which consumed a total of 65 acres. Colorado Department of Transportation officials closed U.S. 36 at McCaslin Boulevard in both directions after the wind caused damage to the pedestrian overpass. Metal siding from the overpass fell into highway; fortunately there were no injuries. In total…electrical outages affected 46 thousand customers along the Front Range. Damage to roofs…siding… Garage doors and fences was also reported. Peak wind gusts included: 93 mph near Lyons; 88 mph at NCAR Mesa Lab; 85 mph…2 miles southwest of Rocky Flats; 82 mph…5 miles northwest of Boulder; 81 mph…2 miles north of Longmont…4 miles east-northeast of Nederland…the National Wind Technology Center and near Wondervu; 80 mph at the junction of highways 72 and 93; 79 mph at the Boulder Municipal Airport; 78 mph…6 miles northwest of Boulder; 77 mph at Rocky Mountain Municipal Airport; 76 mph atop Berthoud Pass; 75 mph near Aspen Springs; 70 mph at Longmont Municipal Airport; 64 mph at Erie Municipal Airport. At Denver International Airport…peak wind gusts of 53 mph on the 22nd and 55 mph on the 23rd were observed.


In 1960…heavy snowfall of 6.1 inches at Stapleton Airport on the 22nd and 23rd marked the beginning of a protracted cold spell which lasted until the end of the month. The cloudy… Cold weather was accompanied by occasional light snow or flurries and fog. New record low temperatures for the dates were set on the 24th thru the 29th with the lowest temperature of 11 degrees below zero on the 28th. The seven consecutive days of low temperatures of zero or below had been exceeded in duration only 4 times previously. New low maximum temperatures for the dates were set on the 23rd… 24th…and the 26th thru the 29th with the lowest maximum temperature of 8 degrees recorded on the 26th.


In 1904…west winds sustained to 42 mph with gusts as high as 60 mph warmed the temperature to a high of 63 degrees.

In 1907…a thunderstorm…relatively rare in February…was observed over the city. The chance of occurrence is around once every ten years.

In 1977…while 60 to 100 mph winds produced a huge dust storm over much of eastern Colorado…only an experimental windmill at the Rocky Flats nuclear plant was destroyed in the Denver area. Winds at Rocky Flats were clocked to 90 mph. Northwest winds gusted to 46 mph at Stapleton International Airport.

In 1986…wind gusts to 79 mph were clocked at Echo Lake in the foothills west of Denver.

In 1992…a rare February thunderstorm occurred. This was only the 5th time since 1891 that thunder has been heard in February.

In 1994…periodic high winds occurred over the higher elevations of the Front Range eastern foothills. The strongest wind gusts reached 87 mph atop Squaw Mountain near Idaho Springs. Southwest winds gusted to only 25 mph at Stapleton International Airport.

In 1996…high winds gusting as high as 76 mph were reported along the Front Range foothills and adjacent urban corridor. Wind gusts to 70 mph were reported atop Table Mesa near Boulder and to 63 mph in Broomfield. West winds gusted to 38 mph at Denver International Airport.

In 2012…bands of moderate to heavy snow…associated with a strong upper level jet…formed over the southern Front Range foothills…Palmer Divide and southern Denver suburbs. Storm totals included: 10 inches…2 miles west-northwest of Highlands Ranch and Kiowa; 9.5 inches near Castle Rock and Littleton; 8 inches at Aspen Springs and Marston Reservoir; 7.5 inches at Evergreen and Louviers; 7 inches…5 miles south-southwest of Arapahoe Park; with 4 to 6 inches elsewhere. Officially…Denver International Airport observed 1.9 inches of snowfall.


In 1935…northwest winds sustained to 37 mph with gusts as high as 47 mph produced considerable blowing dust behind a cold front on the 23rd. The dust was dampened by 7.0 inches of snowfall over downtown Denver from the late evening of the 23rd through the evening of the 24th.

In 1997…heavy snow fell in the foothills. Snowfall totals included 8 inches at sunshine canyon northwest of Boulder… And 6 inches at Morrison. Snowfall totaled only 2.4 inches at the site of the former Stapleton International Airport. East winds gusted to only 22 mph at Denver International Airport on the 23rd.


In 1912…a severe winter storm dumped 14.2 inches of snowfall over downtown Denver. Snow fell continuously from 9:40 am on the 23rd until 9:15 pm on the 25th with most of the snow… 9.2 inches…on the 24th. Temperatures were mostly in the 20’s. Northeast winds were sustained to 20 mph on the 24th.

» Click here to read the rest of February 22 to February 28: This week in Denver weather history

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Winter Weather Advisory issued as next storm system arrives late Wednesday

Wednesday, February 25th, 2015 5:15am MST

We enjoyed a brief respite from the cold and snow yesterday and that comes to an end today.  Snow will be returning this afternoon and marks the start of a prolonged period of unsettled weather conditions that will last through the weekend.

For Wednesday we start out with partly clear skies and will see some sun and patches of blue.  As the day progresses however cloud cover will increase as a cold front pushes in this afternoon.

Temperatures will be topping out around 43 degrees around noontime and then drop steadily from there.  As the front arrives we expect winds to increase with gusts to 30mph or so possible for the afternoon.

We start to see chances for snow after noon with increasing coverage from there.  By about 4:00pm we should be seeing widespread snowfall that will last through the night.

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As far as potential snowfall amounts, that gets to be a bit complicated.  We do expect to see some convective activity which may bring brief, heavy snow to a few isolated areas.  Where those areas occur is anyone’s guess.  Conversely, the flow of the storm points to most activity being west and south of Thornton.  Right now we are expecting 3 to 6 inches snowfall in Thornton between this afternoon and sunrise Thursday.  Like the last storm, there is likely going to be some wide variances in snowfall totals over the Denver area.

The National Weather Service has issued a Winter Weather Advisory that goes into effect at 3:00pm this afternoon and runs through 6:00am Thursday.  The snow coupled with some gusty winds and dropping overnight temperatures are expected to create difficult travel conditions.  You can expect your Thursday morning commute to be a rough one.

Please visit our Winter Weather Briefing for complete details on the advisory and monitor that page throughout the event.

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Clear skies, cool temps and calm conditions for Thornton’s Tuesday

Tuesday, February 24th, 2015 5:42am MST

We are set to enjoy our warmest day of the week today however that doesn’t mean much as readings will be about 10 degrees below normal.  The balance of the week will remain unsettled starting with another good chance for snow tomorrow.

For today look for sunny to mostly sunny skies above throughout the day.  Winds will be light.  Highs today will be maxing out around 40 degrees, a good ways below the average for the date of 49.

Our next weather maker arrives tomorrow and could deliver a few more inches of snow from the afternoon into Thursday morning.

Friday and the first part of Saturday look to be calm but then another system may be impacting us with more cold and snow for the latter part of the weekend.  As always, our main page has all the latest.

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February 2015 quickly climbing ranks of snowiest Februarys on record

Monday, February 23rd, 2015 6:56pm MST

As of 5:00am this morning, Denver’s February 2015 ranks as the sixth snowiest February on record.With more snow expected mid-week, it is highly likely the month will climb up the rankings.

How does Thornton compare? Denver’s total for the month is 17.7″ but we are ahead of that at 19.4″.

It should be noted that Denver’s measurement is taken at DIA and has been since 2008. Prior to that it was taken at Stapleton (1950-2007) and downtown (1882-1949). This year Stapleton is at 22.9″ for the month, enough that it would rank as the snowiest February on record had the official location for measuring snowfall not been moved.

Snowiest Februarys on record in Denver, Colorado.  (ThorntonWeather.com)

Snowiest Februarys on record in Denver, Colorado. (ThorntonWeather.com)

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The snow comes to an end but the cold remains Monday

Monday, February 23rd, 2015 5:35am MST

Our latest snowstorm is moving out and while the sun will gradually stage a return later today, temperatures are going to remain quite cold.  In fact, the rest of the week will be chilly and deliver more chances for snow.

We start out the day today with mostly cloudy but those will be decreasing as the day progresses and by the late afternoon mostly clear skies will be above.  Temperatures are going to be quite cold with a forecast high of about 21 degrees.

Looking ahead, Tuesday will be the warmest day of the week with plenty of sun and a high near 40 degrees.  That is well below the average of 48 degrees though.

Another series of disturbances begins to impact us from Wednesday through Friday.  Colder temperatures return as does chances for snow.  Right now it doesn’t look like anything extraordinary but we could see a few inches.

The image has your weather outlook for today and you can check the extended forecast here.

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Time lapse video captures Thornton’s February 2015 snow

Sunday, February 22nd, 2015 4:13pm MST

A prolonged period of snowfall began in Thornton, Colorado on February 21, 2015 and by the time it is done will have lasted 36 hours or so.  Thornton’s snowfall totals were not nearly as impressive as some others around the Denver metro area, however it was one of the bigger storms of the season so far.

This video captures 28 hours of images from our east webcam beginning at noon on February 21 running until 4:00pm on February 22.  The video takes those 28 hours and compresses it into a 53 second time lapse.

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