Thornton, Colorado, USA
UpdatedFri, 28-Oct-2016 2:15am MDT 


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Labor Day weekend to offer above norm temps, a couple chances for storms

Friday, September 2nd, 2016 5:03am MDT

Overall the holiday weekend weather is going to offer good opportunities for barbeques and outdoor activities. We do start out with some chances for thunderstorms and will see the mercury rising after today.

For Friday there is a good bit of moisture aloft and that is going to bring in some cloud cover. Temperatures will be topping out right near the average for today’s date of 84 degrees. Some thunderstorms will be possible through much of the day although most of the excitement is expected to be to our east.

Saturday brings more sun and warmer temperatures. Look for highs in the mid to upper 80s. The afternoon brings slight chances for thunderstorms.

Drier and hotter conditions will be on tap for Sunday. We will see a healthy dose of sun above and temperatures in the low 90s. Right now we aren’t expecting any thunderstorm activity.

For the Labor Day holiday, it cools slightly and will be quite pleasant. Temperatures will be topping out in the upper 80s and we should be dry.

Enjoy your holiday weekend!

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Thursday brings rising mercury, continued dry conditions

Thursday, September 1st, 2016 5:00am MDT

For the most part, the weather today will be similar to yesterday’s sunny and dry conditions. The one change will be the temperature which will climb to levels just a bit above normal.

We start out the day with sunny skies and then will see a few clouds as the day progresses. No shower or thunderstorm activity is expected. Temperatures will start out on the cool side but then climb to a high in the mid-80s.

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Pleasant temperatures, calm conditions for Thornton’s Wednesday

Wednesday, August 31st, 2016 5:26am MDT

Yesterday ended up putting on a very cool light show after dark but precipitation stayed south of Thornton. Today we again expect to be dry and overall conditions should be quite nice.

We start out with a few clouds then will see mostly sunny skies for the middle part of the day. Mid to late afternoon will see a slight increase in the cloud cover. Temperatures will be topping out in the low 80s making for a very comfortable day.

Right now it looks like any thunderstorm activity will be well to our south and east.

Have a great day!

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August 2016 top shots: Monthly photo slideshow

Wednesday, August 31st, 2016 3:00am 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 31, 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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Tuesday continues cool temps, brings another chance for storms

Tuesday, August 30th, 2016 4:57am MDT

Thornton’s weather today offers conditions much like what we saw yesterday. Temperatures will be a bit below normal and the afternoon and evening may bring some thunderstorms.

We start out the day with partly sunny skies and similar sky conditions will remain throughout the day. Temperatures start out a bit cool and then we will warm up with a forecast high of around 80 degrees.

The afternoon brings a slight chance for thunderstorms although most activity is expected to be to our south. The storms that do get going will have the potential to bring gusty winds and brief, heavy rain.

Keep an eye on the sky with our interactive radar here.

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Iceland’s Largest Volcano Rocked By Earthquakes

Monday, August 29th, 2016 12:54pm MDT

Iceland’s largest volcano was recovering Monday after being rocked by a series of early morning earthquakes. The North Atlantic Island’s Met Office reported that two earthquakes with magnitudes of 4.6 and 4.5 hit the Katla volcano, some of the biggest seismic activity to hit the crater since 1997. According to Bloomberg, the two large quakes were… » Click here to read the rest of Iceland’s Largest Volcano Rocked By Earthquakes

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Typhoon Lionrock Predicted To Hit Japan

Monday, August 29th, 2016 12:53pm MDT

Typhoon Lionrock is expected to make landfall in Japan early in the week, according to reports. AccuWeather reported the storm will hit the coast of Japan as early as Monday night or Tuesday morning local time, and the heavy rainfall and intense winds could bring about three to six feet of storm surge. Lionrock’s interaction with… » Click here to read the rest of Typhoon Lionrock Predicted To Hit Japan

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Thornton’s workweek starts with cooler temps, slight chance for storms

Monday, August 29th, 2016 5:05am MDT

Yesterday saw a rebound to above normal temperatures but today and the first part of this week we see a return to cooler conditions.

Monday we start out with the breezy winds from last night continuing initially but then settling down. There is a good bit of moisture aloft and that will lead to partly sunny skies today. Temperatures will be topping out around 82 degrees, a bit below the average for the date of 85 degrees.

The afternoon brings just a slight chance for some isolated thunderstorm activity.

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August 28 to September 3: This Week in Denver Weather History

Sunday, August 28th, 2016 7:09am MDT
This Week In Denver Weather History

August 28 to September 3: This Week in Denver Weather History

So who is ready for some snow? Along with many other notable weather events, it was this week in Denver history when we received our earliest snowfall on record!

From the National Weather Service:


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.


In 2004…a brief chilly spell resulted in three temperature records. The high temperature of 55 degrees on the 27th was a record low maximum for the date. The low temperature of 48 degrees on the 27th equaled the record minimum for the date. The low temperature of 42 degrees on the 28th was a record minimum for the date.


In 1887…a dry thunderstorm produced north winds to 48 mph but only a trace of rainfall.

In 1968…one man was seriously injured by lightning while riding on a roller coaster at a Denver amusement park. An airline employee was injured when lightning struck a jetliner he was servicing at Stapleton International Airport. A lightning-caused fire did extensive damage to one house and minor damage to several others in the city of Denver.

In 1970…a microburst wind gust to 53 mph was recorded at Stapleton International Airport.

In 2002…a severe thunderstorm produced 3/4 inch diameter hail near Parker.

In 2005…lightning sparked a small fire near Jamestown. The blaze was quickly contained and consumed less than an acre.


In 1876…after the passage of a gentle rain shower to the east during the late evening hours…the moon shone brightly and a remarkably bright lunar rainbow appeared.

In 1910…an apparent cold front produced sustained northeast winds to 40 mph.

In 1946…the high temperature warmed to only 55 degrees…the record low maximum for the month.

In 1989…a spectacular lightning display knocked out power to 300 blocks in southeast Denver. One bolt started a fire in a lumber yard in the northeast part of the city…and the attic of a home in the same area was set ablaze by a lightning bolt.

In 1996…3/4 inch diameter hail was measured in Parker.

In 2000…lightning struck two homes in Thornton. The extent of damage was unknown.

In 2002…two small tornadoes caused damage in southeast metro Denver. The first tornado…associated with a multi-vortex storm…touched down briefly near E-470 and South Jordan Road. Some fences were damaged…and a few trees were blown down. A few of the homes also sustained minor roof damage. Damage from this storm totaled 100 thousand dollars. The second tornado associated with the storm touched down in a subdivision that was under construction at Gartrell and Arapahoe roads. Four large condominiums under construction were destroyed. The most heavily damaged portions of the structures were still in the framing stages. Adjacent sections where enclosed walls were in place were not destroyed. A man suffered 4 broken ribs and several cuts and bruises when the trailer he sought shelter in was flipped three times and torn apart by the twister. Damage from this storm totaled 6 million dollars. A severe thunderstorm produced 1 inch diameter hail near Evergreen.

In 2006…severe thunderstorms produced large hail in the foothills west of Denver. Hail to 1 inch in diameter fell near Blackhawk. Hail as large as 7/8 inch was measured near Idaho Springs…along with 3/4 inch hail near Nederland and conifer.


In 1981…60 mph winds were reported in Boulder.

In 2004…a severe thunderstorm produced hail as large as 1 inch in diameter in south Aurora near Cherry Creek.


In 1951…hail as large as 1 3/4 inches in diameter caused an estimated 300 thousand dollars damage in metro Denver. Hail as large as 1 1/2 inches in diameter was measured at Stapleton Airport.

In 1978…strong thunderstorm winds tore the roof off an apartment building in Aurora…downed trees…and damaged windows in Denver. A microburst wind gust to 58 mph was recorded at Stapleton International Airport.

In 1985…a thunderstorm wind gust to 60 mph was clocked at Buckley Field in Aurora.

In 1997…hail to 1 1/4 inches in diameter was measured in Aurora.

In 2006…a female postal worker was struck and injured by lightning while delivering mail in Westminster.

In 2008…lightning struck a home in Brighton…damaging the roof and a bedroom. The damaged totaled 20 thousand dollars.


In 1951…large hail pounded Boulder…causing thousands of dollars in damage to roofs and automobiles. Heavy thunderstorm rainfall flooded basements and produced widespread street flooding.

In 1966…severe thunderstorms caused local flooding in areas from Denver to the north and east. There was scattered damage from hail and lightning. Streets were flooded in Boulder…and streets and basements were flooded in several areas of metro Denver. The public reported 1 inch diameter hail in Aurora and near Cheery Creek Reservoir. Thunderstorm rainfall totaled only 0.39 inch at Stapleton International Airport.

In 1985…severe thunderstorms dumped heavy rain and hail at many locations along the Front Range from Denver south. The southern and eastern suburbs of metro Denver were especially hard hit. Rainfall from 1 1/2 to 3 inches caused extensive street flooding in Aurora where two creeks rose out of their banks. Two homes in the city suffered minor lightning damage. Almost 4 inches of rain fell in the Parker area. Hail up to ping-pong ball size piled up to a foot deep and closed a road in Evergreen. Hail as large as 1 3/4 inches in diameter was reported 8 miles northeast of Deckers. Wind gusts to 65 mph were estimated in southeast Aurora.

In 1990…marble size hail piled up to 2 inches deep in the foothills community of Kittredge…18 miles southwest of Denver. As much as half an inch of rain fell in just 15 minutes and caused minor road and small stream flooding. A thunderstorm dropped pea to marble size hail and brief heavy rain near Ward road and 64th avenue in Arvada. Minor street and small stream flooding was reported in the area.

In 1995…a strong thunderstorm microburst with only a few drops of rain produced a recorded wind gust to 85 mph at the site of the former Stapleton International Airport. The wind gust occurred at 8:30 pm MDT. The all-time highest recorded temperature in September…97 degrees… Occurred. The same temperature also occurred on September 5…1899…September 4…1960…and September 4… 1995.


In 1995…record breaking heat occurred on the first 5 days of the month when the temperature climbed into the 90’s on each day. Record high temperatures of 97 degrees on both the 1st and 4th equaled the all-time record maximum for the month. High temperature of 95 degrees on the 3rd was a record for the date. High temperatures of 94 degrees on both the 2nd and the 5th were not records. The low temperature of 64 degrees on the 4th equaled the record high minimum for the date.

» Click here to read the rest of August 28 to September 3: This Week in Denver Weather History

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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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