Thornton, Colorado, USA
UpdatedThu, 23-Nov-2017 3:15pm MST 


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Potentially record-setting warmth for Thornton’s Thanksgiving

Thursday, November 23rd, 2017 6:12am MST

A very mild day ahead for our holiday. We will enjoy mostly sunny skies, calm and dry conditions and mercury readings that may set records.

The day starts with mostly sunny skies and those will stick with us until late afternoon when a few more clouds will arrive. Winds will be out of the west and relatively light until the overnight hours.

In terms of temperatures, we are expecting a high temperature this afternoon of 73 degrees. That is also the record high temperature for November 23rd set in 1915. Additionally, Denver’s warmest Thanksgiving Day (1909) saw a high reading of 73 degrees as well. It is quite possible those records will be tied or even fall. Much will depend on the impact of any cloud cover.

Tonight, winds will be a bit breezy under partly cloudy skies. Lows will dip to the low 40s.

We wish you a very happy Thanksgiving! You can keep an eye on current temperatures here.

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November 2017 top shots: Monthly photo slideshow

Thursday, November 23rd, 2017 5:17am MST
November 3, 2017 - A stunning sunrise in Thornton. (Jessica Bloom)

November 3, 2017 – A stunning sunrise in Thornton. (Jessica Bloom)

Typically November is a quiet weather month with plenty of nice, fall days but it can also turn wet with healthy doses of snow and moisture.  The wide variety of conditions can create picturesque scenes ranging from blue skies and snow-capped mountains to a wintry wonderland in the metro area.

November is the second snowiest month of the year so winter conditions are not unusual.  Typically though, these bouts of cold are short-lived and normal daytime conditions are pleasant.

Outdoor activities continue to be quite popular during the month.  The cooling temperatures do oftentimes lead to an increase in wildlife activity.

All of the above help lead to a month in which a wide variety of scenes, flora and fauna can be captured.

  • Slideshow updated November 23, 2017
  • 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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Wednesday warms up with a good bit of cloud cover, some wind

Wednesday, November 22nd, 2017 5:05am MST

We are going to close out the workweek in pretty decent fashion today. Temperatures bounce right back to well above normal levels but we will see some clouds and some breezy winds.

The day starts off with partly sunny skies and we expect to see similar, high cloud cover throughout the day. Temperatures should top out in the mid-60s although those clouds may inhibit the forecast highs by a couple of degrees. Winds will be light initially then pick up a bit in the afternoon.

Tonight, skies will clear after midnight and overnight lows dip to the upper 30s.

Looking ahead to the Thanksgiving holiday, it looks to be a very mild one with plenty of sun and highs over 70 degrees. Details in the extended forecast.

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Cold front to usher in cooler temperatures, slight chance for showers

Tuesday, November 21st, 2017 4:59am MST

A bit of a change Tuesday in the weather pattern of recent days. A cold front will be moving through that will offer up a slight chance for a few drops of rain and bring temperatures down close to normal.

The day starts off with some breezy winds and mostly cloudy skies. We will see a good bit of cloud cover until mid-morning when coverage will then begin to gradually ease. As the front pushes toward us early this morning, a few sprinkles of rain will be possible through the morning hours.

In terms of temperatures, it will remain cool this morning until the front passes then we should warm up some with highs today topping out right near the average high for the date of 49 degrees.

Tonight, partly cloudy skies will be above and lows dip to within a couple of degrees of freezing.

Looking ahead, unseasonably warm temperatures return for the balance of the week. Get a look at the extended forecast here.

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Pacific Northwest May Be at Most Risk for the ‘Big One’

Tuesday, November 21st, 2017 3:15am MST

The next big earthquake is due in the Pacific Northwest—but now scientists have pinpointed where along the coast a large earthquake is most likely to happen, according to a study published Monday. “We observed very compact sediments offshore of Washington and northern Oregon that could support earthquake rupture over a long distance and close to the trench, which increases both earthquake and tsunami hazards,” lead author of the study Shuoshuo Han,… » Click here to read the rest of Pacific Northwest May Be at Most Risk for the ‘Big One’

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Solar System’s First Interstellar Visitor Dazzles Scientists

Monday, November 20th, 2017 6:22pm MST

Artist’s concept of interstellar asteroid 1I/2017 U1 (‘Oumuamua) as it passed through the solar system after its discovery in October 2017. The aspect ratio of up to 10:1 is unlike that of any object seen in our own solar system. » Click here to read the rest of Solar System’s First Interstellar Visitor Dazzles Scientists

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November 19 to November 25: This week in Denver weather history

Monday, November 20th, 2017 5:22am MST
This Week In Denver Weather History

November 19 to November 25: This week in Denver weather history

With the Thanksgiving holiday approaching, travelers cast a wary eye on Denver’s weather and in our look back at this week in Denver weather history we see they have had cause for concern in the past. Snowstorms and wind have caused their share of problems. Also notable, it was 140 years ago that Denver’s first official weather observation occurred.

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From the National Weather Service:


In 1975…snowfall totaled only 5.5 inches and north winds gusted to 35 mph causing some blowing snow at Stapleton International Airport…while a major blizzard struck southeastern Colorado.

In 1985…4 to 7 inches of snow fell across metro Denver. Snowfall totaled 4.4 inches at Stapleton International Airport where north winds gusted to 23 mph.

In 1991…another strong winter storm produced heavy snow over metro Denver. Snowfall totaled 9.5 inches at Stapleton International Airport with 9 inches at Parker… And 8 inches in southeast Denver…Morrison…and Wheat Ridge. This second storm brought the 5 day (15th-19th) snowfall total at Stapleton International Airport to 21.1 inches. The greatest depth of snow on the ground was 13 inches on the morning of the 19th. The adverse effects of the two storms were diminished by the lack of significant winds.


In 1930…a major storm dumped a total of 13.6 inches of snowfall over downtown Denver. Most of the snow…9.4 inches…fell on the 19th when north winds were sustained to 23 mph. This was the only measurable snow of the month. Temperatures hovered in the 20’s and lower 30’s.

In 1956…an intense winter storm dumped 12.8 inches of snowfall on metro Denver. Strong north-northeast winds gusting to 33 mph at Stapleton Airport frequently reduced the visibility to 1/2 mile in snow and blowing snow on the 19th. Most of the snowfall…10.7 inches…occurred on the 19th.


In 1931…the first measurable snow of the season totaled only 1.0 inch in the city.

In 1977…near-blizzard conditions caused some traffic accident injuries across metro Denver. Only 1.3 inches of snow fell at Stapleton International Airport where northeast winds gusted to 28 mph.


In 1979…a heavy snowstorm buried most of Colorado under at least a foot of snow. Snowfall at Stapleton International Airport totaled 17.7 inches…the greatest snow depth since 1946. Winds to 60 mph produced 5-foot drifts paralyzing the city as temperatures hovered in the 20’s. While small airports closed…Stapleton remained open…but with long delays that snarled thanksgiving holiday traffic. Schools and businesses closed and postal deliveries were delayed. Almost all major highways leading out of Denver were closed to traffic for periods of time on the 20th and 21st. Most of the snow…13.5 inches…fell on the 20th. At Stapleton International Airport…north winds gusted to 35 mph on the 20th and to 38 mph on the 21st.


In 1871…the first official weather observation in Denver… Was taken by Henry Fenton…observer sergeant of the united states army signal service at 5:43 am. The office was located on the 2nd floor of a building at the corner of Larimer and g streets…now 16th street. The daily weather journal hand written entry for the day follows: “Snow fell heavily during past night. At 5:43 am it was snowing light and continued until 8 am. Wind during snow storm gentle and a little west of south…and continued there during the remainder of the day. Sky clear after 8 am. Very cold weather prevailed all day and night. Thermometer at 9:43 pm 14 degrees. Rain gauge and self-registering thermometer not in position owing to severe storm last week. Barometer falling during the morning and rising rapidly at night.”

In 1894…northwest Chinook winds sustained to 40 mph with gusts to 45 mph warmed the temperature to a high of 58 degrees in the city.

In 1909…steady and very strong winds in Boulder caused 3 thousand dollars in damage.

In 1915…post-frontal northeast winds sustained to 40 mph with gusts as high as 42 mph produced only a trace of snow. It was windy most of the day.

In 1923…west winds were sustained to 42 mph with gusts to 44 mph before daybreak. The strong winds persisted in the city for only about 3 hours.

In 1993…a wind gust to 72 mph was recorded at Table Mesa in southwest Boulder.

In 1994…winds gusted to 77 mph atop Squaw Mountain west of Denver. West winds gusted to 40 mph at Stapleton International Airport.


In 1898…snowfall totaled 4.0 inches in downtown Denver. Northeast winds were sustained to 48 mph with gusts as high as 60 mph behind an apparent cold front on the 20th… When temperatures plunged from a high of 66 degrees to a low of 9 degrees. On the 21st the high was only 24 degrees and the low was 2 degrees.

In 1970…a wind gust to 94 mph was recorded at gold hill in the foothills west of Boulder. Strong winds also swept across metro Denver. Wind gusts reached 59 mph in downtown Boulder…while at Stapleton International Airport west- northwest winds gusted to 43 mph on the 21st. Damage was minor.

In 1992…a large Canadian air mass moved into the state at the same time an upper level storm system approached from the west. The combination of cold air at the surface and very moist air aloft produced heavy snow across the entire state. Snowfall totaled 6.3 inches at Stapleton International Airport…where north winds gusted to 23 mph on the 20th. Snow was heavier in the foothills…with 14 inches at Wondervu…13 inches at Aspen Springs…Conifer… Boulder…and Gross Reservoir…8 inches at Rollinsville… And 10 inches at Golden Gate Canyon and Morrison.

In 2007…a storm system brought moderate to heavy snowfall to portions of the urban corridor. Storm totals included: 7 inches…3 miles south-southeast of Fort Collins…with 6 inches in Boulder and at Horsetooth Inlet Bay. Elsewhere… Storm totals ranged from 2 to 5 inches. Snowfall totaled 2.0 inches at the site of the former Stapleton International Airport.


In 1891…northwest winds were sustained to 50 mph with gusts to 60 mph.

In 1899…a trace of snow fell in the city. This…together with a trace of precipitation on the 16th and 23rd…was the only precipitation of the month…making the month the driest on record. The record was equaled in November of 1901 and 1949. This trace of snow along with a trace of snow on the 23rd was the only snow of the month…ranking the month the 2nd least snowiest on record. This record was equaled in November of 1884…1901…1905…1917…and 1939.

In 1900…west winds were sustained to 46 mph with gusts to 54 mph. The Chinook winds warmed the temperature to a high of 64 degrees.

In 1934…the latest date for the first measurable snow of the season occurred. This was not the first snow of the season… Because traces of snow had fallen earlier in September. Snowfall totaled only 1.0 inch over downtown Denver.

In 1962…strong west-northwest Chinook winds gusted to 53 mph at Stapleton Airport.

In 1998…an intense mountain wave allowed for high winds to develop in the foothills of Boulder County. Wind gusts as high as 77 mph were measured 3 miles east- northeast of Nederland.


In 1905…a trace of snow fell on both days in downtown Denver. This was the only snow of the month…ranking the month along with other Novembers…the 2nd least snowiest on record.

In 1999…the first significant snowfall of the season struck metro Denver. Snowfall totals included: 16 inches near Bailey; 13 inches near Evergreen; 12 inches at north turkey creek…Genesee…near Morrison…and near Sedalia; 11 inches near Conifer and in Evergreen; 10 inches in Louisville; 9 inches in Brighton…Broomfield…and Denver; and 8 inches at Arvada…Castle Rock…and Eldorado Springs. Snowfall totaled 8.4 inches at the site of the former Stapleton International Airport.

In 2003…heavy snow fell in and near the foothills of Boulder County. Snowfall totaled 10.5 inches in Eldorado Springs. Across the city…snowfall was lighter with 2.8 inches measured at the site of the former Stapleton International Airport on the 22nd. North winds gusted to 32 mph at Denver International Airport on the 22nd.

» Click here to read the rest of November 19 to November 25: This week in Denver weather history

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Mild temperatures, breezy winds start Thornton’s short workweek

Monday, November 20th, 2017 5:06am MST

Monday will offer up unseasonably warm temperatures. However, those temperatures will be driven by warming, downslope winds that will put a bit of a damper on things.

The day starts with mostly sunny skies to be followed by an increase in cloud coverage later this morning leading to partly sunny skies. The pre-dawn hours saw winds pick up and already drive the thermometer higher. That gives us a head start on our expected high temperature today of 66 degrees. Winds will be breezy in the morning then gain some steam in the afternoon and last into the evening before tapering off overnight.

Tonight look for partly clear skies with lows in the mid-30s.

Keep an eye on those windspeeds here.

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Weekend weather starts warm and windy, cools down and may bring some precip

Friday, November 17th, 2017 5:04am MST

We will be seeing a bit of a break from the warm, calm conditions of recent days. A storm system will impact the state today and tomorrow and while the high country will bear the brunt of it, we will feel some of its effects.

Things get started on Friday with another unseasonably warm day. Highs will top out in the mid to upper 60s, aided by strong downslope winds. Winds will be quite breezy throughout the day, particularly this afternoon and tonight. The front will push through by midafternoon and temperatures are then going to drop quite quickly. The evening may see a sprinkle of rain in some spots.

Tonight, the winds will continue after late evening into early morning could see any precipitation that falls turn to snow. However, we are not expecting much, if any, accumulation. There just isn’t much moisture to work with. Lows tonight will dip to a bit below freezing.

On Saturday, things settle down and the sun returns however temperatures are going to cool considerably in the wake of the front. Look for highs in the upper 40s under sunny skies. Overall conditions will be calm.

Tomorrow night into Sunday morning, it will be mostly clear with overnight lows dipping to the mid-20s.

Sunday rebounds nicely with lots of sun and calm, dry conditions. Highs will be around the 60 degree mark.

Have a great weekend!

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Thornton’s Thursday to offer very mild temperatures, mostly sunny skies

Thursday, November 16th, 2017 5:09am MST

A return to the unseasonably warm weather we have seen a lot of here recently. Today, temperatures jump to about 20 degrees above normal.

The day starts off with mostly sunny skies and that will be the general rule. Some increase in clouds can be expected in the late afternoon. Winds will be relatively light and out of the southwest throughout the day.

Temperatures start out chilly this morning then will see a quick and steady climb toward an early afternoon high of around 73 degrees. The average high for today’s date is 52 degrees.

Tonight, conditions will remain calm other than some breezy winds early tomorrow morning. Overnight lows will be in the low 40s.

Keep an eye on the thermometer here.

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