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Thornton to enjoy mild temperatures Wednesday but with a good dose of wind

Wednesday, January 13th, 2021 5:04am MDT

Downslope winds are going to be the main feature for our weather today. While they will allow us to have a mild day, the wind will be blustery at times.

Mostly sunny skies start us off today then we will see cloud cover increase by late morning / early afternoon. Winds will be a bit breezy early then pick up speed in the afternoon. Temperatures will be quite mild, aided by the downslope flow. Look for highs near the 60-degree mark.

Tonight, partly cloudy skies will be above with continuing breezy conditions. Speeds will actually be increasing after midnight, foretelling a windier day tomorrow. Overnight lows will be in the mid-20s.

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January 10 to January 16: This week in Denver weather history

Wednesday, January 13th, 2021 4:54am MDT

This Week in Denver Weather History

January weather is like the weather of any other month in Denver  in that you can see just about any type of condition possible.  However, three conditions are dominant during the month – wind, snow and cold.  All three make many appearances in our look back at this week in Denver weather history.

From the National Weather Service:

7-10

In 1962…a major winter storm dumped 13.5 inches of snow on metro Denver.  A foot of the snow fell on the 8th when northeast winds gusted to 30 mph.  The storm was followed by an intense blast of very cold arctic air.  Minimum temperature readings of 24 degrees below zero occurred on both the 9th and 10th.  The temperature never reached above zero on the 9th when a maximum reading of 1 degree below zero was recorded.  Temperatures were below zero for 37 consecutive hours.

8-10

In 1983…winds of 70 to 90 mph howled through Boulder. A wind gust to 100 mph was recorded on Fritz Peak near Rollinsville.  A tree blown down by the wind damaged a house in eastern Boulder County.  The strong winds developed behind a cold front late on the 8th and continued through the 10th.  At Stapleton International Airport…west to northwest winds gusted to 49 mph on the 8th…to 45 mph on the 9th…and to 48 mph on the 10th.

9-10

In 1962…the low temperature plunged to 24 degrees below zero on both days.

In 1972…a west wind gust to 60 mph was recorded at Stapleton International Airport…while in Boulder a wind gust to 86 mph was recorded at the National Bureau of Standards. The roof of a house was blown off…and trees were blown down in Boulder.  The high winds contributed to the damage from a building fire in Boulder.

In 2000…heavy snow and strong winds in the mountains spilled into the Front Range foothills.  Ward…northwest of Boulder…received 9 inches of new snow.  Wind gusts to 91 mph were measured in Golden Gate Canyon…with gusts to 77 mph at Loveland Ski Area and to 73 mph along State Highway 93 north of Golden.  West winds gusted to 44 mph at Denver International Airport on the 9th.

In 2011…a winter storm brought moderate to heavy snowfall to areas in and near the Front Range foothills and Palmer Divide. Storm totals included: 13 inches…3 miles south of Golden; 11.5 inches near Eldorado Springs…10.5 inches… 2 miles southwest of Boulder; 10 inches…3 miles southwest of Roxbourough State Park; 9 inches at Genessee…8.5 inches in Arvada…4 miles south-southeast of Bennett and greenwood village…8 inches… 8 miles south of Elizabeth; 7 inches at Commerce City and 6.5 inches near Louisville and at Denver International Airport. Gusty winds produced snow drifts up to 2 feet deep over the Palmer Divide.

10

In 1893…strong west winds in Boulder and the adjacent foothills caused only minor damage.

In Denver…northwest winds were sustained to 48 mph with gusts as high as 60 mph.  The Chinook winds warmed the temperature to a high of 64 degrees and a low of only 40 degrees…which was a record high minimum for the date.

In 1911…southwest Chinook winds sustained to 44 mph warmed the temperature to a high of 60 degrees.

In 1932…the first thunderstorm ever officially recorded in Denver during January occurred in the early morning. The assistant observer heard two prolonged peals of thunder between 4:20 am and 4:25 am.  Another off-duty observer was awakened by the thunder.  Other people reported both thunder and lightning.  Light snow was falling at the time.  Pellets of graupel or hail were reported from some parts of the city.  Snowfall totaled only 1.8 inches.  Northwest winds gusted to 30 mph.

In 1962…as the temperature dipped to a frigid 24 degrees below zero…setting a new record minimum for the date… The pressure adjusted to sea level reached the highest ever recorded in Denver…31.24 inches (1057.8 mb).  The altimeter setting reached 30.70 inches…and the actual station pressure recorded was 25.260 inches.

In 1988…strong winds occurred throughout the day in and near the foothills.  Peak gusts to 85 mph were recorded at Rollinsville…84 mph at Echo Lake…and 64 mph in Boulder.

In 1990…a third consecutive day of 50 to 85 mph wind gusts occurred in and along the eastern foothills.  A 5 mile portion of the Denver-Boulder turnpike was closed after clouds of blowing dust and gravel caused several multicar accidents near Broomfield.  One 59-year-old woman was killed and two others injured.  A wind gust to 81 mph was recorded at the nearby Jefferson County Airport. In Boulder…wind gusts to 85 mph were blamed for ripping off a portion of a roof on a house…as well as blowing out the large picture window.  West winds gusted to 41 mph at Stapleton International Airport.  The warm Chinook winds set a record high temperature of 71 degrees in Denver for the date.

In 1996…strong northwest winds developed behind a pacific cold front that moved rapidly across northeast Colorado. A peak wind gust to 64 mph was recorded at the Rocky Flats Environmental Test Facility in Jefferson County.  North- northeast winds gusted to 38 mph at Denver International Airport.

10-11

In 1948…strong winds were reported in Boulder and Lakewood. Winds of 50 to 60 mph were reported at Valmont…just east of Boulder.  Only minor damage was reported.

In 1980…strong winds of 60 to 95 mph howled across metro Denver…causing some brief power outages and some broken windows.  A wind gust to 111 mph was recorded at Wondervu. Northwest winds gusted to 40 mph at Stapleton International Airport on the 10th.

In 1999…high winds gusting to 100 mph blasted the foothills. Peak wind gusts included:  100 mph at central city…98 mph at Wondervu…82 mph at Aspen Springs and Golden Gate Canyon… 81 mph at the NCAR Mesa Lab in Boulder and near Nederland… 78 mph atop Blue Mountain near Coal Creek Canyon…and 72 mph at the Rocky Flats Environmental Test Facility.  West winds gusted to 38 mph and warmed the temperature to a high of 63 degrees at Denver International Airport on the 11th.

10-12

In 1997…heavy snow fell over the Front Range foothills. A foot of new snow was measured at Blackhawk with 7 inches recorded in Coal Creek Canyon.  Only 3.3 inches of snow fell at the site of the former Stapleton International Airport.  East-northeast winds gusted to 18 mph at Denver International Airport on the 11th.

10-13

In 1963…a arctic cold wave plunged temperatures well below zero across metro Denver.  Temperatures were below zero for a total of 64 consecutive hours.  Low temperatures reached 25 degrees below zero on both the 11th and 12th.  The high temperature of 9 degrees below zero on the 11th was the coldest ever recorded at Stapleton Airport and equaled the record low maximum for the month first set on January 19…1883…in downtown Denver.  The high temperature on the 12th reached only 1 degree below zero.  On the 12th…an 18-year-old youth died of exposure from the extreme cold in Denver.  There were many losses and damage to property from frozen water systems…stalled cars…and over-burdened heating systems.  Light snow accompanied the arctic blast. At Stapleton Airport…2.3 inches of snow fell on the 10th and 11th.

11 » Click here to read the rest of January 10 to January 16: This week in Denver weather history

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Tuesday in Thornton to offer above average temps, sunny skies above

Tuesday, January 12th, 2021 4:58am MDT

A pretty nice looking day ahead for us. Thornton will enjoy warmer than normal temps and plenty of sun above.

The day starts with clear skies and similar conditions will be above for much of the day. A few clouds here and there may appear but they won’t amount to much. High temperatures today will top out in the low to mid-50s.

Tonight, skies remain mostly clear with overnight lows around freezing.

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Temperatures near normal, lots of sun start off Thornton’s workweek

Monday, January 11th, 2021 4:53am MDT

A pleasant winter day for our Monday. Mercury readings will top out right near average with plenty of that Colorado blue above.

Sunny skies start us off and will be with us all day. A few, light cirrus clouds might come through later but they won’t obscure things. Highs today will top out right near the average high for the date of 44 degrees. Overall conditions will be calm and dry.

Tonight, skies remain mostly clear with overnight lows in the low 20s.

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Thornton’s weekend weather to start pleasant then offer up a good chance for snow

Friday, January 8th, 2021 5:17am MDT

A little bit of a mixed bag of weather ahead for us. While it will start and finish nice enough, in between Saturday is going to bring some light snow.

For Friday, look for sunny skies for much of the day with calm, dry conditions. Highs will top out in the mid-40s. Tonight, clouds will be increasing and overnight lows dip to around 20 degrees.

Saturday will see the arrival of a storm system. Cloudy skies will be above for most of the day and highs will only be around the freezing mark. Some flurries will be possible in the morning then the afternoon and evening bring good chances for snow. It will not be amounting to much though with Thornton looking to get 1 to 2 inches total. Saturday night snow will be ending and skies slowly clearing. Lows will drop to around 20 degrees.

Sunday sees a recovery with a return to mostly sunny skies. Temperatures will remain chilly though with highs in the mid to upper 30s.

Have a great weekend!

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Increased clouds, temperatures near normal for Thornton’s Thursday

Thursday, January 7th, 2021 4:58am MDT

A passing system will lead to increased moisture aloft and thus bring some cloud cover. It will, however, have little effect on our weather otherwise and we will have calm conditions and temps near normal.

Mostly clear skies start us off but then as the system approaches, cloud cover will increase. Partly sunny skies will be above from mid-morning onward. High temperatures today will again be near average for the date and reach the mid-40s. Overall conditions will be calm and dry.

Tonight, partly clear skies will be above with overnight lows dropping to the low to mid-20s.

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Wednesday to offer calm conditions, temperatures right near normal

Wednesday, January 6th, 2021 5:12am MDT

Following yesterday’s cold front, we will cool down a bit today. However, it will still relatively pleasant with lots of sun and mercury readings near normal.

Sunny skies start us off and will be with us throughout the day. There might be a cloud or two along the way but nothing that amounts to much. Winds will be light and out of the southwest, conditions calm and dry. High temperatures will top out in the mid-40s, right near the average high for the date of 44 degrees.

Tonight, skies will be clear until the early morning hours when cloud cover will increase. Lows will be around the 20 degree mark.

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Passing front to bring windy conditions Tuesday, temps remain somewhat mild though

Tuesday, January 5th, 2021 4:58am MDT

A little bit of a change in our recent weather pattern. The system that arrives this morning will bring some wind however temps will remain warmer than normal and we do not expect precipitation.

Mostly sunny skies start us off and will be with us throughout the day. Temperatures will once again top out near the 50 degree mark, a respectable amount above the average high for the date of 43 degrees.

The most notable part of today’s weather will be the wind. Speeds will be picking up by mid-morning and build with gusts to 40mph being possible this afternoon. Late afternoon / early evening will see speeds gradually decrease.

Tonight, winds will remain pretty breezy until the early morning hours tomorrow. Overnight lows will drop to the low 20s.

Keep an eye on those winds with our live weather gauges here.

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Monday to offer up a good bit of sun, temperatures above normal

Monday, January 4th, 2021 4:53am MDT

We start of the workweek pretty nicely in Thornton. We will see a day much like yesterday with temps coming in warmer than normal and mostly sunny skies above.

Mostly clear skies will start us off with a slight increase in cloud cover around mid-day. Winds will be relatively light, conditions calm and dry. High temperatures will top out around the 50 degree mark.

Tonight, cloud cover increases and lows will drop to the mid-20s.

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January 3 to January 9: This week in Denver weather history

Sunday, January 3rd, 2021 5:13pm MDT

This Week in Denver Weather History

January weather in Colorado can be as varied as during any month of the year.  Temperatures bordering on spring-like to bone chilling Arctic cold can be seen.  Snow of course plays a big part and while not always recognized as a big danger, high speed damaging winds are not unusual.

31-6

In 1973…the 31st marked the start of a protracted cold spell that extended into January of 1974 when temperatures dipped below zero on 7 consecutive days.  Record daily minimum readings occurred on the 3rd and 5th when the temperature plunged to 17 degrees below zero on both days. A record low daily maximum temperature of only 4 degrees occurred on the 5th.

31-7

In 1941…a protracted cold spell through January 7…1942… Produced below zero low temperatures on 7 of the 8 days. A low temperature of 2 degrees on the 3rd prevented a string of 8 days below zero.  The coldest days during the period were the 1st with a high of 2 degrees and a low of 9 degrees below zero…the 4th with a high of 2 degrees and a low of 11 degrees below zero…and the 5th with a high of 26 degrees and a low of 12 degrees below zero.

1-5

In 1940…the first days of the month were characterized by a mixture of drizzle…light snow…and fog.  Fog occurred on each day.  On the 4th and 5th considerable glazing resulted from freezing drizzle.  All objects were coated with a glaze on the windward side.  This resulted in very slippery streets…which caused several minor traffic accidents.  The glaze was not heavy enough to damage wires and cables.

2-3

In 1971…a major storm dumped a total of 8.4 inches of snow at Stapleton International Airport where north winds gusted to 23 mph.

In 1972…a strong cold front late on the 2nd produced north wind gusts to 35 mph at Stapleton International Airport. Snow…heavy at times on the 3rd…totaled 6.4 inches as temperatures hovered only in the single digits.

In 2000…heavy snow fell over the higher terrain of the palmer divide to the south of metro Denver.  Snowfall totaled 7 inches 5 miles southwest of Sedalia.  Only 1.5 inches of snowfall were measured at the site of the former Stapleton International Airport.

2-4

In 1949…the worst blizzard in many years struck metro Denver and all of northern Colorado.  The storm produced blizzard conditions with wind gusts of 40 to 50 mph all day on the 3rd when temperatures were only in the single digits.  This resulted in extremely cold wind chill temperatures of 40 to 55 degrees below zero.  Stapleton Airport received 13.3 inches of snow from the storm… While downtown Denver received 11.8 inches.  The snow fell for 51 consecutive hours downtown.  Numerous lives were lost…and livestock losses were high across the northeastern plains of Colorado where extensive airlift operations were needed to bring supplies and food to isolated communities.

2-5

In 1959…very cold temperatures…to near zero and below…caused power and gas lines…water pipes…and automatic sprinkler systems to break.  In Boulder… Merchandise and furnishings were water damaged when pipes burst in a department store…flooding three floors.  The temperature was below zero for 38 consecutive hours at Stapleton Airport on the 2nd…3rd…and 4th and plunged to a low of 13 degrees below zero on the 4th.

3

In 1874…heavy snowfall totaled 6 inches with 5 inches falling in 3 hours.  Melted snow totaled 0.40 inches of precipitation.  Northeast winds were sustained to 24 mph.

In 1887…west winds were sustained to 44 mph in the city.

In 1913…northwest Chinook winds sustained to 42 mph with gusts to 52 mph warmed the temperature to a high of 58 degrees.  The low temperature was only 40 degrees.

In 1951…northwest winds gusted to 56 mph at Stapleton Airport.

In 1967…a strong Chinook wind reached 90 mph at the National Center for Atmospheric Research in Boulder.  In downtown Boulder winds only gusted to 35 mph.  Northwest winds gusting to 49 mph produced some blowing dust at Stapleton International Airport.

In 1986…winds gusted to 63 mph at Jefferson County airport near Broomfield and reached 73 mph at Echo Lake in the foothills west of Denver.  West winds gusted to 46 mph at Stapleton International Airport.

In 1994…high winds raked the eastern foothills.  Wind gusts to 99 mph were recorded on Squaw Mountain…south of Idaho Springs…and gusts to 85 mph occurred at the rocky flats facility in northwest Jefferson County.  Northwest winds gusted to 41 mph at Stapleton International Airport.  No significant damage was reported.

In 1996…very strong Chinook winds gusting to 104 mph blasted the Front Range foothills and portions of metro Denver. Three people were injured in separate incidents.  One man was injured when strong crosswinds toppled his moving van into oncoming traffic along Colorado 93 south of Boulder. Two other people received minor injuries from flying debris. At the Rocky Flats Environmental Test Facility…eleven hazardous waste storage facilities received at least 100 thousand dollars in damage.  In addition…several power lines were downed leaving 3 thousand homes and stores without power.  Hundreds of car windows were shattered…and several signs were toppled from buildings.  Some of the strongest wind gusts included:  104 mph at Boulder municipal airport…98 mph in south Boulder…96 mph at Jefferson County airport…94 mph at the National Center for Atmospheric Research southwest of Boulder…91 mph at the Rocky Flats Environmental Test Facility…and 90 mph at Wondervu southwest of Boulder.  West-northwest winds gusted to only 39 mph at Denver International Airport where the Chinook winds warmed the temperature to a high of 52 degrees.

In 2004…bands of heavy snow fell across metro Denver. Snowfall totals included 6.5 inches in Broomfield and 6 inches in Westminster…Arvada…and near Hudson.  Only 0.5 inch of snow fell at the site of the former Stapleton International Airport.  More snow fell in the foothills with 9 inches recorded near Jamestown.  Southeast winds gusted to 25 mph at Denver International Airport.

In 2006…locally high winds developed in northern Jefferson County over and near rocky flats.  Peak wind gusts from 75 to 91 mph were recorded during the afternoon.  A semi-trailer truck was blown onto its side on State Highway 93 atop rocky flats.  Strong winds also spread across metro Denver.  West winds gusted to 44 mph at Denver International Airport.

3-4

In 1982…wind gusting to 85 mph in the Table Mesa area of Boulder caused a few power failures.  West winds gusted to only 32 mph at Stapleton International Airport.

In 2000…high winds buffeted the foothills of Boulder County. Wind gusts were reported to 91 mph at Nederland and 81 mph at the National Center for Atmospheric Research on the mesa southwest of Boulder.  Southwest winds gusted to only 31 mph at Denver International Airport on the 4th.

3-5

In 2017…the first in a series of powerful winter storms brought a period of heavy snow to the north central mountains… Front Range Foothills and Urban Corridor. In the mountains and foothills…the heaviest snowfall occurred along and north of the Interstate 70 corridor. Storm totals ranged from one to around three feet. Eastbound I-70 was closed at Vail and Silverthorne because of poor conditions and several spun-out vehicles. Across the Interstate 25 corridor…heavy snow fell over northern parts of metro Denver north to Loveland. At Denver International Airport…145 flights were canceled. Storm totals in the mountains and foothills included: 19.7 inches 5 miles northeast of Ward…18 inches…17 inches near Brainard Lake and Copeland Lakes; 16 inches…5 miles east-northeast of Nederland and Niwot Ridge SNOTEL; 15.7 inches at Eldora… 14.5 inches at Berthoud Pass; 14 inches at Allenspark and 12 inches at Gross Reservoir. Along the I-25 Corridor…storm totals included: 13.8 inches in Boulder…12 inches at Marston Reservoir…9.5 inches in Niwot…9 inches at Flatiron Reservoir… 8.3 inches in Northglenn; 8 inches at Hygiene…7 inches in Arvada…5 miles west-northwest of Brighton…Frederick… Lafayette…Loveland and 5 miles northeast of Westminster; with 6.5 inches at Ralston Reservoir and Wheat Ridge. At Denver International Airport…there was a mix of rain and snow with only 0.10 inches of snowfall observed on the morning of the 4th.

» Click here to read the rest of January 3 to January 9: This week in Denver weather history

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