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Thornton, Colorado, USA
UpdatedThu, 07-Jul-2022 1:40am MDT 
 

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A mild Monday starts off Thornton’s workweek

Monday, January 17th, 2022 4:53am MDT

This is a fine way to celebrate Martin Luther King Jr. Day. We will enjoy a good dose of sun, calm conditions and temperatures well above normal.

The day starts with clear skies then a few clouds will begin to appear through the day but should not become too intrusive. High temperatures will top out around 60 degrees, well above the 45 degree high average for the date. Overall conditions will be calm and dry.

Tonight, cloud cover will slowly increase leading to partly clear skies. Overnight lows will be in the mid to upper 20s.

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Thornton’s weekend starts out chilly & breezy, then clears out and warms up

Friday, January 14th, 2022 5:00am MDT

The three-day period starts out with a change from the recent mild weather offering colder temps, wind and perhaps just a touch of precipitation. After today though, conditions calm down and warm up.

For Friday, we will see some sun early then cloud cover will be increasing. With the increase in clouds will also come increased wind speeds as it will be quite breezy for most of the day. From mid-morning to late afternoon we may see some showers / light snow. Unfortunately it is not expected to be anything notable. High temperatures will top out around 40 degrees. Tonight, winds will settle down after dark and cloud cover will decrease after midnight. Overnight lows will be well into the teens.

After a cold start, Saturday will be chilly but calm. Highs tomorrow will top out in the low to mid-40s with sunny skies above. Saturday night, partly cloudy skies will be overhead with lows in the mid-20s.

Sunday looks to be the warmest day of the period. With sunny to mostly sunny skies, highs will top out around 50 degrees.

Have a great weekend!

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One more very mild day for Thornton on Thursday

Thursday, January 13th, 2022 5:03am MDT

No doubt you are enjoying the warmer-than-normal temperatures of recent days and you get one more today. Tomorrow will break the streak with colder temps and a chance for some snow.

For today, clear skies start us off and then there will be a steady, slow increase in cloud cover throughout the day. The clouds won’t have much impact on temperatures though as we look to reach a high around 60 degrees. Overall conditions will be calm and dry.

Tonight, lows will drop to a bit below freezing under mostly cloudy skies.

As for the coming cold, a weak system arrives tonight. Temperatures tomorrow will be colder than normal and the afternoon brings a chance for snow although it looks like accumulations will be minimal, if any at all. More in the extended forecast here.

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More mild temperatures, lots of sun in store for Wednesday

Wednesday, January 12th, 2022 5:08am MDT

Much like the last two days, Thornton will again enjoy pleasant weather conditions today. Temps will remain above normal with plenty of blue above.

The day does start out with some cloud cover but that will be gradually easing throughout the day. Overall conditions will be calm with a light, southwest wind. High temperatures will top out in the mid to upper 50s.

Tonight, lows will drop to the mid-20s under mostly clear skies.

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Tuesday in Thornton to offer relatively mild temperatures, a good dose of sun

Tuesday, January 11th, 2022 5:07am MDT

We again will enjoy a pleasant, winter day. Temperatures will be above normal and while there will be some clouds, they won’t be overly intrusive.

Mostly clear skies start us off then some additional high level clouds will build in the morning. Those will dissipate some later in the day. Temperatures will top out around 50 degrees, about 5 degrees above average for the date. Overall conditions will be calm and dry.

Tonight, skies will be mostly clear with lows dipping into the low 20s.

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Lots of sun, calm conditions, temps above normal for Thornton’s Monday

Monday, January 10th, 2022 4:53am MDT

Well, there isn’t much to complain about with today’s forecast. Your workweek is going to start out in fine fashion with lots of Colorado blue above and temps above normal.

The day starts with clear skies and will continue as such throughout the daytime hours. Overall conditions will be calm and dry. High temperatures will be topping out close to the 50 degree mark.

Tonight, a few clouds will appear after midnight but otherwise it will be calm. Overnight lows will be around 20 degrees.

Enjoy!

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January 9 to January 15: This week in Denver weather history

Sunday, January 9th, 2022 4:53am MDT

This Week in Denver Weather History

Winds along the Front Range this time of year can be a blessing and a curse all at once.  Chinook’s can warm temperatures well above what they normally would but they can also cause a great deal of damage when they are at their hardest.  We see these contrasts 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.

8-9

In 1891…heavy dry snowfall totaled 9.7 inches over downtown Denver.  Most of the snow…6.5 inches…occurred on the 8th when north winds were sustained to 12 mph with gusts to 20 mph.

In 1939…heavy snowfall totaled 6.7 inches in downtown Denver. The snowfall was the heaviest overnight…particularly during the early morning hours.  The moist snow adhered to the north side of the instrument shelter and other objects to a depth of 2 inches.  Snow accumulated on fences and trees to several inches.  This was the greatest snowfall of the month that year.  The greatest depth on the ground was 6.5 inches.  North to northwest winds were sustained to 24 mph on the 8th and to 27 mph on the 9th.

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

In 1875…the all time lowest recorded official temperature in Denver…29 degrees below zero…occurred between 3:00 am and 4:00 am under clear skies with calm winds.  The temperature climbed to zero at noon and to a high of 8 degrees at 3:00 pm.

In 1916…Chinook winds from the southwest sustained to 42 mph with gusts as high as 48 mph warmed the temperature to a high of 57 degrees.

In 1917…Chinook winds…southwesterly in direction…sustained at 43 mph with gusts to 48 mph warmed the temperature to a high of 55 degrees.  The low temperature was only 43 degrees.

In 1950…strong west winds to 50 mph produced blowing dust… Which briefly reduced visibility to 3/4 mile at Stapleton Airport.

In 1957…west-northwest winds gusted to 51 mph at Stapleton Airport.

In 1988…a wind gust to 61 mph was recorded at Echo Lake. West winds gusted to only 16 mph at Stapleton International Airport.

In 1989…strong Chinook winds howled along the eastern foothills.  A peak gust to 115 mph was recorded at the Boulder airport where a light plane was severely damaged when the wind flipped it over.  Gusts reached 103 mph at Table Mesa in south Boulder.  Homes in the city suffered damage to roofs…gutters…and siding.  Fences were blown down…and windows in both homes and cars were broken.  A radio station was off the air for 2 1/2 hours when the winds blew the top 80 feet off its 180-foot transmission tower.  A school roof was partially torn off…and a few traffic signals were downed.  Winds 60 to 80 mph were reported at Jefferson County Airport in Broomfield. West winds gusted to 47 mph at Stapleton International Airport.

In 1990…high winds buffeted the Front Range foothills for a second straight day.  Wind gusts to 92 mph were recorded at Rollinsville.  Wind gusts of 65 to 90 mph were noted in the Denver-Boulder area.  No significant damage occurred. Northwest winds gusted to 38 mph at Stapleton International Airport where the maximum temperature reached 63 degrees.

In 2017…high winds developed in and near the Front Range Foothills. Peak wind gusts included: 90 mph near Pleasant View; 88 mph near Louisville; 87 mph near Gold Hill; 79 mph at the NCAR Mesa Laboratory; 76 mph at Glen Haven; 60 mph in Littleton and 58 mph in Arvada. Scattered outages affected approximately 2400 customers in Boulder and Jefferson Counties. In Berthoud…strong winds destroyed a barn. At Denver International Airport…a peak wind gust of 56 mph from the northwest was recorded.

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.

» Click here to read the rest of January 9 to January 15: This week in Denver weather history

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Thornton’s weekend weather to offer up near normal temps, relatively calm conditions

Friday, January 7th, 2022 5:03am MDT

Not too bad of a weekend ahead. Overall, conditions will be calm and dry but there will be one, slight chance for precipitation.

For Friday, it will be the warmest day of the three-day period with highs in the mid to upper 40s. There will be a good bit of cloud cover overhead though. Tonight, skies will remain partly cloudy with lows in the low to mid-20s.

Saturday offers temperatures near normal with highs in the low to mid-40s. We will start out sunny then a weak cold front moves in increasing the cloud cover. The evening brings just a slight chance for a shower but if there is any precipitation it is not expected to amount to much. Saturday night into Sunday morning, partly clear skies will be above with overnight lows in the teens.

Sunday will offer up the most sun of the period but also the coolest temperatures. Look for highs in the mid-30s under sunny to mostly sunny skies.

Have a great weekend!

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Following the snow, Thornton’s Thursday to remain cold

Thursday, January 6th, 2022 5:10am MDT

Our latest snowstorm overperformed a little bit and while it won’t amount to much moisture, it is welcome. In its wake, Thornton will see a return of some blue skies but cold temps will remain.

As of 4:00am, Thornton received 4.6 inches of light, fluffy snow. Roads are snow packed and slick so caution is advised. Temperatures in the single digits with some light winds have prompted a Wind Chill Advisory to be in effect until 8:00am. Be careful and limit your exposure outside.

We will see temperatures rise after sunrise but not much. Highs will only be in the mid to upper 20s. After some clouds initially, mostly sunny skies will be above for most of the day.

Tonight, mostly cloudy skies will be above. Our overnight low of 18 degrees or so will actually come this evening. Then, warming west winds will actually see temps increase a bit through dawn tomorrow.

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January 2 to January 8: This week in Denver weather history

Thursday, January 6th, 2022 5:07am MDT

This Week in Denver Weather History

Certainly cold and snow are to be expected in Denver in January and our look back at this week in Denver weather history has plenty notable events with those conditions.  However, as we pointed out in our January weather preview, oftentimes it is the wind that is the real story.  Powerful Chinook winds appear during the month and we see the damaging – and sometimes deadly – results when we look back in time.

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.

1-2

In 1896…warm Chinook winds on the 1st became cold Bora winds on the 2nd.  Southwest winds sustained to 60 mph with gusts as high as 66 mph warmed the temperature to a high of 55 degrees on the 1st.  Northwest winds sustained to 54 mph with gusts to 60 mph resulted in snowfall of 0.3 inch and a high temperature of only 31 degrees on the 2nd.

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

In 1972…strong northwest Chinook winds in advance of a cold front gusted to 51 mph at Stapleton International Airport and caused temperatures to warm to a high of 55 degrees.

In 1986…high winds occurred along the Front Range foothills. The strongest recorded gust was 82 mph in the Table Mesa area of Boulder.  Other places in Boulder reported gusts from 68 to 80 mph.  West winds gusted to 43 mph at Stapleton International Airport.

In 1989…high winds between 60 and 70 mph were recorded in Boulder and along the eastern foothills.  No damage was reported.  West winds gusted to 49 mph at Stapleton International Airport.

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.

» Click here to read the rest of January 2 to January 8: This week in Denver weather history

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