84°F
Thornton, Colorado, USA
UpdatedThu, 19-May-2022 6:25pm MDT 
 

Navigation

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

 

Weather Geek Stuff - weathergeekstuff.com

Rocky Mountain Weather Network

Tony's Takes Photography

ThorntonWeather.com

Recent News and Posts


Another winter storm sets its sights on Thornton for Wednesday

Wednesday, February 16th, 2022 5:15am MDT

These things have been just about a weekly event lately. A potent storm will arrive today bringing colder temperatures and a good shot of snow.

Cloud cover will be increasing this morning becoming entirely cloudy by about noon. Temperatures will reach their high in the mid-30s right about that time then decrease from there.

Some flurries and light snow will start to be seen around noon as well with light / minimal accumulations through 4:00pm. Right about rush hour, intensity will then pick up and the bulk of the snow will come between then and about 11:00pm. It will then taper off, ending entirely by about 3:00am tomorrow.

The National Weather Service has issued a Winter Storm Warning that will be in effect from 2:00pm today to 5:00am tomorrow. They are calling for 4 to 8 inches at lower elevations.

There is still a good bit of uncertainty as to how this event will unfold. The opening sentence of this morning’s discussion had the NWS saying, “Still not sure how thing are going to evolve later this aftn and tonight.” We do think 3 to 5 inches is the likely amount for Thornton. This system does look to have a good bit of upslope so the potential is there for us to see more.

Be safe if you venture out this afternoon and evening and keep an eye on our Winter Weather Briefing Page for the latest.

Join the Discussion - Post your commentJoin the Discussion!

Thornton to enjoy one more mild day Tuesday before colder weather arrives tomorrow

Tuesday, February 15th, 2022 5:09am MDT

One more day with warmer-than-normal temperatures today although we will have a good bit of cloud cover overhead. Tonight, a cold front arrives that will chill us out and bring a shot of snow.

For today, partly sunny skies will be overhead throughout the day. Overall, conditions will be calm. High temperatures will top out in the mid-50s, about 10 degrees above average for the date.

Tonight, clouds will increase some as a cold front arrives. Overnight lows will be in the mid-20s.

As for the coming storm, colder temps will be the rule for the next couple of days with highs only in the mid-30s. A few flakes of snow may be seen tomorrow morning with light snow in the afternoon. Tomorrow evening, activity will pick up and continue until midnight then taper off.

Lots of inconsistency with the models as to how this is going to play out but, right now, it looks like Thornton is set to receive 1 to 3 inches, mainly starting late afternoon tomorrow. Hopefully we’ll get a better picture as the event gets closer and be able to better nail down the details.

Join the Discussion - Post your commentJoin the Discussion!

February 13 to February 19: This Week in Denver Weather History

Monday, February 14th, 2022 5:24pm MDT

This Week in Denver Weather History

High winds and wintry weather highlight our look back at this week in Denver weather history.  Among the notable events is Denver’s longest continuous period of snow cover – 61 days – that occurred just four years ago.

From the National Weather Service:

10-13

In 1905…an extremely cold arctic air mass moved over the city behind a cold front on the 10th and persisted through the morning of the 13th.  North winds were sustained to 25 mph behind the front on the 10th dropping the temperature to a low of 2 degrees below zero…which was also the high reading on the 11th.  Light snowfall totaled 3.0 inches overnight of the 10th into the 11th.  The low temperature plunged to 19 degrees below zero on the 11th.  Records were set on the 12th and 13th.  The high temperature of only zero degrees on the 12th was a record low maximum for the date.  The low readings of 21 degrees below zero on the 12th and 14 degrees below zero on the 13th were record minimum temperatures for those dates.

11-13

In 1903…west to northwest Chinook winds gusting to 34 mph warmed the temperature to a high of 50 degrees on the 11th… Before temperatures rapidly plunged to a low of 14 degrees behind a cold front.  Light snow fell through the 13th and totaled 4.2 inches in the city…while temperatures ranged from a high of 14 degrees on the 12th to a low of 5 degrees below zero on the 13th.

12-13

In 1915…heavy snowfall totaled 7.0 inches over downtown Denver.  Northwest winds were sustained to 24 mph on the 13th.

In 1951…heavy snowfall totaled 8.1 inches at Stapleton Airport where northeast winds gusted to 28 mph on the 12th.

In 1968…snowfall totaled 5.6 inches at Stapleton International Airport where northeast winds gusted to 26 mph.  Snow fell all day on the 12th and into the morning hours of the 13th.

In 1997…heavy snow fell in the foothills southwest of Denver.  Conifer…Evergreen…Morrison…and north turkey creek received 6 to 8 inches of new snow overnight. Only 0.2 inch of snow fell at the site of the former Stapleton International Airport.  North-northeast winds gusted to 23 mph at Denver International Airport on the 13th.

13

In 1886…northwest winds were sustained to 40 mph during the early morning hours…but winds were strong and gusty all day.

In 1918…west winds were sustained to 42 mph with a measured extreme velocity to 44 mph.  The strong Chinook winds warmed the temperature to a high of 58 degrees.

In 1988…high winds raked metro Denver.  Boulder reported a wind gust to 67 mph with 63 mph at Lakewood and 49 mph at Stapleton International Airport.  The strong winds toppled a tree onto a car in Aurora.  Northwest winds gusting to 49 mph at Stapleton International Airport warmed the temperature to a high of 64 degrees.

In 2010…a peak wind gust to 89 mph was recorded in Boulder. North winds gusted to 28 mph at Denver International Airport.

13-14

In 1895…a cold air mass settled over the city.  High temperatures of only 4 degrees on the 13th and 8 degrees on the 14th were record low maximum temperatures for each day.  Low temperatures were 6 degrees below zero on the 13th and 5 degrees below zero on the 14th…but were not records.  Light snow totaled only 0.4 inch.  Winds were light.

In 1960…snowfall totaled 6.1 inches and north-northwest winds gusted to 39 mph at Stapleton Airport.

In 1967…high winds were widespread along the foothills where wind gusts of 60 to 90 mph were common.  A wind gust to 108 mph was measured at the National Center for Atmospheric Research in Boulder.  Sustained winds of 50 to 55 mph with gusts as high as 70 mph were recorded in downtown Boulder. An estimated 3 thousand dollars in damage occurred to mobile homes in Boulder.  Power lines were downed over a wide area.  At Stapleton International Airport…west winds gusted to 32 mph on the 13th and southwest winds gusted to 48 mph on the 14th.

In 1972…winds gusted to 67 mph at the National Bureau of Standards in Boulder.  Wind gusts to 49 mph were measured in downtown Boulder.  West winds gusted to 26 mph at Stapleton International Airport.

In 2001…heavy snow fell across metro Denver and in the foothills.  Snowfall totals included:  8 inches at Evergreen; 7 inches atop Crow Hill and in Lakewood; 6 inches in Denver…doubleheader…Eldorado Springs… Morrison…and pine junction.  Snowfall totaled 4.8 inches at the site of the former Stapleton International Airport. Northeast winds gusted to 33 mph at Denver International Airport on the 13th.

14

In 1918…southwest winds were sustained to 41 mph with a measured extreme velocity to 46 mph.

In 1987…metro Denver received only 3 to 4 inches of snow… But the foothills west of Boulder received up to 11 inches of snow.  Snowfall totaled 4.2 inches at Stapleton International Airport where north winds gusted to 31 mph.

In 1988…winds gusted to 81 mph at Echo Lake.

In 2002…high winds developed in the Front Range foothills during the early morning hours.  Winds gusted to 84 mph… 11 miles north of Central City.  West winds gusted to 43 mph at Denver International Airport.
14-15 in 1960…heavy snowfall totaled 6.1 inches at Stapleton Airport.

In 1965…5.4 inches of snow fell at Stapleton International Airport behind a cold front.  North-northeast winds gusted to 32 mph.  Winds were strong and gusty all day and caused considerable blowing snow…contributing to hazardous driving conditions mainly to the east of Denver.

In 1984…a snow and wind storm howled across eastern Colorado closing I-70 east of Denver.  This was the second blizzard in less than 4 days.  Only 0.5 inch of new snow fell at Stapleton International Airport…but north winds gusted to 51 mph.

» Click here to read the rest of February 13 to February 19: This Week in Denver Weather History

Join the Discussion - Post your commentJoin the Discussion!

Valentine’s Day offers up very mild temperatures, calm conditions for Thornton

Monday, February 14th, 2022 5:03am MDT

A pretty nice day to go for a stroll with your significant other. Mother Nature is delivering us a pleasant day with temps well above normal and lots of sun.

Sunny skies will be above most of the day. Mid to late afternoon will see some clouds as mid and upper level moisture increases. Overall, conditions will be calm and dry. High temperatures are going to climb to the mid to upper 50s, well above the average high for the date of 45 degrees.

Tonight, skies will be mostly cloudy with overnight lows in the upper 20s.

Join the Discussion - Post your commentJoin the Discussion!

Thornton’s weekend starts out with a quick storm, then clears out and warms up

Friday, February 11th, 2022 5:00am MDT

The three-day period starts off with a wintry blast on Friday and will see temps drop and deliver a shot of snow. Thankfully, the balance of the weekend looks warmer and calmer.

For today, mostly cloudy skies will be above for most of the day as the storm arrives. Winds will be blustery throughout. Our high temperature in the mid-30s will be seen by about noon then temps will drop.

As for the snow, we could see some flakes close to noon then the best chances come from about 2:00pm to 9:00pm. There is a good bit of instability with the system that is expected to generate some banding that may deliver brief periods of moderate to heavy snow.

The National Weather Service has issued a Winter Weather Advisory although areas to our west and south will be hit harder. For us, 1 to 3 inches is likely, potentially more if we get a band to set up over us. Tonight, snow will be done before midnight and skies will see some clearing. Overnight lows will be in the teens.

Saturday calms down although we will see a bit of cloud cover. Highs will top out in the mid-40s with overall calm, dry conditions. Saturday night, lows will be in the low 20s under mostly clear skies.

Super Bowl Sunday looks to be a fine day on the Front Range. We will enjoy a lot of sun and temperatures will climb to the low to mid-50s.

Join the Discussion - Post your commentJoin the Discussion!

A mild day Thursday with a good bit of sun, some breezy winds

Thursday, February 10th, 2022 4:48am MDT

Another mild day ahead that will likely end up being the warmest of the week. There will, however, be some breezy winds but they shouldn’t be too bad.

Mostly sunny skies will be above throughout the daytime hours. We will initially be calm then late morning will bring some breezy winds that will last for the balance of the day. High temperatures will climb to the mid-50s.

Tonight, partly cloudy skies will be above with lows a bit below freezing.

Join the Discussion - Post your commentJoin the Discussion!

Wednesday to offer more clouds but temps remain above average

Wednesday, February 9th, 2022 4:58am MDT

A weak disturbance moves through today but its effects will be limited. We will still see warmer than normal temperatures but there will be more clouds than in recent days.

Mostly sunny skies will be with us for most of the day with a bit of an increase in cloud cover later in the day. Overall conditions will be calm with west winds. High temperatures today will top out around 50 degrees.

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

Join the Discussion - Post your commentJoin the Discussion!

February 6 to February 12: This week in Denver weather history

Tuesday, February 8th, 2022 6:09am MDT

This Week in Denver Weather History

Cold, snow and wind mark this week in our look back at Denver weather history.  Numerous notable events including a period of 69 hours when the temperatures remained below zero – the fourth longest on record.

30-7

In 1985…a cold front on the 29th produced a protracted cold spell as arctic air remained entrenched across metro Denver. While the only daily temperature record set was a low maximum reading of 2 degrees on February 3rd…minimum temperatures plunged well below zero on 9 consecutive days. The coldest readings were 15 degrees below zero on January 31st and 14 degrees below zero on February 5th.

31-8

In 1963…warm weather that began with the strong Chinook winds on the 31st and 1st continued through the 8th. Maximum temperatures through the period ranged from 52 degrees on the 2nd to 76 degrees on the 5th…which was a new record high for that date.

31-12

In 1899…a protracted cold spell lasted almost two weeks. Low temperatures plunged below zero on all days but February 9th with a reading of 6 degrees.  The coldest low temperature of 22 degrees below zero on February 6th was a record low for the date.  Low temperatures of 20 degrees below zero occurred on both February 11th and 12th… But only the 11th remains as the record minimum for the date.  High temperature of only 5 degrees below zero on February 11th was a record low maximum for the date.  High temperatures climbed to only zero degrees on both February 2nd and 3rd…but were not records.  Intermittent light snow or flurries fell during the period.  The most snowfall…2.0 inches…occurred on February 2nd.

1-6

In 1989…one of the century’s worst doses of winter weather ravaged the entire state.  Bitterly frigid weather moved into metro Denver on the 1st as snow buried many sections of the state.  In metro Denver where 3 to 6 inches of snow fell…blowing snow and resultant poor visibilities caused a 46-car pile-up on I-25 in the middle of the city on the 4th.  During the period…2 to 3 hour delays were common at Stapleton International Airport where snowfall from the storm totaled 4.3 inches and northeast winds gusted to 30 mph on the 1st.  Intense cold accompanied the storm. Temperatures in Denver stayed below zero continuously for the best part of 3 days (3rd…4th…5th)…for a total of 69 hours.  This is the fourth longest sub-zero period on record.  Wind chill temperatures reached 50 degrees below zero.  The mercury dipped to 24 degrees below zero on the 5th…setting a record for the date.  This was the city’s coldest temperature in over 26 years.  Low temperatures dipped below zero on 8 consecutive days (2nd-9th).  High temperature of 9 degrees below zero on the 4th was a record low maximum for the date…as was the high of 5 degrees on the 5th.  Extensive damage occurred when pipes and water lines froze and broke.  Thousands of cars failed to start. On the 3rd…a 57-year-old woman died of hypothermia in an Arvada park.  Eighteen high school students were treated for hypothermia after a 2-hour ride through Jefferson County in an unheated bus.  At least 2 cases of frostbite were reported; there were undoubtedly many more.

1-9

In 1883…a protracted cold period occurred when low temperatures dipped below zero for 9 consecutive days. Low temperatures ranged from 22 degrees below zero on the 4th to 2 degrees below zero on the 1st and 6th.  High temperatures ranged from 10 below zero on the 3rd to 23 on the 9th.  Several temperature records were set that still stand today.  Record lows of 18 below and 22 below zero occurred on the 3rd and 4th.  Record low maximum readings of 2 below and 10 below zero occurred on the 2nd and 3rd.  The high of only 10 below zero on the 3rd is the coldest maximum temperature ever recorded in Denver.

4-6

In 1986…10 inches of snow fell in Boulder…in the foothill town of Wondervu southwest of Boulder…and at Evergreen west of Denver.  Snowfall totaled 2.4 inches at Stapleton International Airport…where north winds gusted to 20 mph on the 6th.

5-6

In 2003…heavy snow fell in the foothills.  Snowfall totals included:  17 inches at Genesee; 16 inches at Lookout Mountain; 11 inches at Chief Hosa near Indian Hills…and 7 miles southwest of Boulder; 10.5 inches atop Gold Hill; and 10 inches at Intercanyon and near Conifer.  Only 2.2 inches of snowfall were measured in the city at the site of the former Stapleton International Airport.

5-11

In 1978…the 5th marked the start of a record 7 consecutive days of dense fog at Stapleton International Airport.  The heavy fog reduced the visibility to 1/4 mile or less for a period of time on each of these days.  Light snow and/or freezing drizzle occurred on most days.  Fog reducing visibility to less than 7 miles was recorded at Stapleton International Airport on 11 consecutive days through the 15th.  During the period 5-14…the cold thick fog deposited heavy rime ice up to 5 inches thick on power lines and poles over a wide area of eastern Colorado…causing a major electrical power outage disaster.

6

In 1899…the temperature dipped to a low of 22 degrees below zero.

6-7

In 1929…5.0 inches of snow fell in downtown Denver behind a Canadian cold front.  Temperatures plunged…but no records were set.  Low readings dipped to 3 degrees below zero on the 6th and 9 degrees below zero on the 7th.  Highs climbed to 5 degrees on the 6th and to only 1 degree below zero on the 7th.

In 1933…post-frontal light snowfall totaled 3.0 inches over downtown Denver.  Northeast winds were sustained to 28 mph with gusts to 32 mph on the 6th.  The very cold air mass plunged temperatures from a high of 60 degrees on the 5th to lows of 10 degrees below zero on the 6th and 16 degrees below on the 7th.  High temperature of only 4 degrees below zero on the 7th was a record low maximum for the date.

6-10

In 1933…3:00 pm on the 6th marked the start of a protracted cold period through 8:00 am on the 10th when the temperature was below zero for 86 out of 88 hours.  The cold period was interrupted on the 8th at 9:00 am when the temperature was 1 degree above zero and at 10:00 am when the temperature was 8 degrees above zero.  Four temperature records were set. High temperatures of 4 degrees below zero on the 7th…8 degrees on the 8th…and 5 degrees below zero on the 9th were record low maximums for those dates.  The only record low temperature record was 14 degrees below zero on the 10th. The lowest temperature reached during the period was 16 degrees below zero on both the 7th and 8th…which were not records.

7

In 1940…a distant thunderstorm was recorded.  This was only the second ever recorded in the city during February since 1900.

In 1976…strong Chinook winds were reported along the foothills with sustained winds at 46 mph and gusts to 69 mph at the National Center for Atmospheric Research in Boulder.  Wind gusts of 70 to 90 mph were recorded at other locations in Boulder.  Northwest winds gusted to 44 mph at Stapleton International Airport.

In 1979…strong west winds gusted as high as 99 mph near Boulder.  The winds caused ground blizzards that closed several highways around Boulder.  Some cars were forced off the road…and a truck was overturned.  Wind gusts of 50 to 80 mph were common in and near the foothills.  Northwest winds gusted to 33 mph at Stapleton International Airport.

In 1988…a wind gust to 82 mph was clocked at Rollinsville in the foothills southwest of Boulder.

In 1999…strong Chinook winds developed in the foothills. Peak wind reports included:  90 mph at the National Center for Atmospheric Research mesa lab near Boulder and 88 mph at Wondervu in the foothills southwest of Boulder. West to southwest winds gusted to only 48 mph at Denver International Airport.

7-8

In 1936…a sharp blast of frigid arctic air was of short duration.  At 11:00 am on the 7th the temperature was 39 degrees…but dropped to only 1 degree within an hour. A more gradual decrease occurred through the night to a low temperature of 25 degrees below zero shortly after 6:00 am on the 8th.  This was the lowest temperature ever recorded in February.  (the record was equaled on February 1…1951.)  Snowfall of 1.0 inch occurred in the cold air. During the day on the 8th…northwest Chinook winds from 12 to 16 mph…and as high as 21 mph warmed the temperature to a high of 35 degrees at 7:00 pm.  This was a rise in temperature of 60 degrees in 13 hours.  Unofficially…the temperature dipped to a low of 30 degrees below zero at Denver municipal airport on the morning of the 8th.

In 1956…5.5 inches of snow fell at Stapleton Airport where east-northeast winds gusted to 23 mph on the 7th.

In 1980…an upslope storm dumped 4 to 10 inches of snow over the plains and as much as 22 inches in the foothills. Traffic was snarled and some schools were closed.  Two runways were closed for 3 hours at Stapleton International Airport…where snowfall totaled 6.5 inches and north winds gusted to 25 mph.  Most of the snow fell on the 7th.

» Click here to read the rest of February 6 to February 12: This week in Denver weather history

Join the Discussion - Post your commentJoin the Discussion!

Tuesday in Thornton brings mild temperatures, sunny skies but also some wind

Tuesday, February 8th, 2022 4:59am MDT

We will enjoy another mild day with mercury readings similar to yesterday. However, a passing disturbance will create some breezy winds that will keep it from being quite as pleasant.

Sunny skies start us off and will be with us throughout the day. Warming, downslope winds keep us somewhat mild this morning then will be picking up from late morning into late afternoon. High temperatures today will top out in the low to mid-50s.

Tonight, winds will subside with mostly clear skies above. Overnight lows will be in the mid-20s.

Keep an eye on the temps and wind speeds here.

Join the Discussion - Post your commentJoin the Discussion!

Thornton’s workweek starts off with mild temps, calm conditions

Monday, February 7th, 2022 4:56am MDT

A nice way to start the week with weather that will help melt off that lingering snow on the ground. We will enjoy lots of sun and temps above average, something that will be repeated much of the week.

Clear skies start us off and will be with us throughout the day today. Winds will be light and out of the south, overall conditions calm and dry. Look for highs to reach the low to mid-50s.

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

For a look at the rest of the week’s weather, click here.

Join the Discussion - Post your commentJoin the Discussion!