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Thornton’s Thursday to offer some clouds but with unseasonably warm temps

Thursday, January 17th, 2019 5:00am MST

One more mild day today before things briefly turn colder. A wave cloud will keep things above a bit covered up but we will still see temps warmer than normal.

The day starts off with partly clear skies and that should be the case through the day as a wave cloud is expected to develop. Temperatures will top out in the low to mid-50s. These may be inhibited slightly depending on how thick that wave cloud becomes.

Tonight, lows will drop to around 30 under mostly cloudy skies. The approaching storm system may bring some light snow in the pre-dawn hours tomorrow but it shouldn’t amount to much, if anything.

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January 13 to January 19: This week in Denver weather history

Thursday, January 17th, 2019 4:02am MST
This week in Denver weather history

January 13 to January 19: This week in Denver weather history

Cold, snow and wind are expected this time of year in northeastern Colorado as we have seen many notable events with those conditions in our past. Notably in our look back at this week in Denver weather history we see that extreme versions of these can lead to injury and even death.

From the National Weather Service:

10-13

In 1963…an 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.

11-14

In 1997…cold arctic air plunged temperatures below zero across metro Denver. The temperature was below zero for 60 consecutive hours from the afternoon on the 11th to around daybreak on the 14th. The high temperature of only 1 degree below zero on the 12th equaled the record low maximum for the date last set in 1963. The low temperature dipped to 14 degrees below zero on the 12th.

12-13

In 1936…strong winds in Boulder blew roofs off homes. Wind gusts over 60 mph were recorded at the University of Colorado and a gust to 55 mph measured at Valmont.

In 2002…high winds developed in the foothills on the 12th and spread over the plains on the 13th. Winds gusted to 76 mph at the National Center for Atmospheric Research on the mesa in Boulder on the 12th. Northwest winds gusted to 49 mph…the highest wind of the month…at Denver International Airport on the 13th. The strongest winds were north and northeast of metro Denver.

13

In 1875…the low temperature dipped to 20 degrees below zero… A record low for the date and climbed to a high of only 2 degrees below zero…a record low maximum for the date.

In 1880…the worst wind storm ever experienced in Boulder caused some damage and personal injuries.

In 1893…northwest winds were sustained to 42 mph in the city.

In 1904…northwest winds were sustained to 40 mph with gusts as high as 50 mph. The Chinook winds warmed the temperature to a high of 63 degrees. The low temperature remained above freezing…dipping to only 34 degrees.

In 1919…snowfall was 1.8 inches in downtown Denver. Melted snow resulted in only 0.12 inch of precipitation. This was the only snowfall and precipitation for the month.

In 1932…snowfall totaled 3.4 inches in downtown Denver. North winds gusted to 22 mph.

In 1967…high winds in Boulder gusted to 70 mph downtown. Some damage occurred. Northwest winds gusting to 38 mph at Stapleton International Airport produced some blowing dust.

In 1988…high winds occurred in Boulder with a wind gust to 70 mph at Table Mesa. In the foothills a wind gust to 82 mph was measured at Rollinsville. West winds gusted to 33 mph at Stapleton International Airport.

13-14

In 1960…snowfall totaled only 4.4 inches and northeast winds gusted to 28 mph at Stapleton Airport…while over southeast Colorado a near blizzard closed roads with drifts 3 to 6 feet deep.

13-16

In 1888…a cold air mass settled over the city and caused temperatures to plunge well below zero on four consecutive days…but only one temperature record was set. Minimum temperatures dipped to 4 degrees below zero on the 13th… 19 degrees below zero on the 14th…20 degrees below zero on the 15th…and 11 degrees below zero on the 16th. The maximum temperature of only 4 degrees below zero on the 14th was a record low maximum for the date. North winds were sustained to 30 mph on the 13th.

14

In 1873…winds were brisk all day. After sunset…northeast sustained winds produced a perfect gale…behind an apparent cold front.

In 1875…the temperature remained below zero all day with a general northeast wind. At 9:00 pm the temperature was 1 degree above zero which was the official high for the day. The wind suddenly veered to the southwest and the temperature climbed 19 degrees in 15 minutes…7 more degrees in the next 5 minutes…and by 9:30 pm had risen to 36 degrees. By 9:35 pm the temperature had reached 40 degrees…a rise of 48 degrees in one hour and 39 degrees in half an hour. The sudden rise in temperature could be attributed to a receding arctic air mass and downsloping surface winds.

In 1906…the temperature climbed to a high of 56 degrees before an apparent cold front produced northeast winds sustained to 40 mph and a trace of snow in the afternoon.

In 1921…west winds were sustained to 44 mph with gusts to 46 mph. The downslope winds warmed the temperature to a high of 49 degrees.

In 1967…3.7 inches of snow fell at Stapleton International Airport with 7.7 inches measured in Boulder.

In 1982…strong Chinook winds buffeted Boulder…tearing the roof off a small apartment building. A gust to 88 mph was measured in Lakewood. Wind gusts of 60 to 80 mph were common along the foothills from Denver north to Fort Collins. Four people sustained minor injuries…mostly from flying glass. At least one person was knocked down by the winds. Several tractor trailer rigs were blown off I-70 near Golden…and numerous camper shells were blown off pick-up trucks.

14-15

In 1908…heavy post-frontal snowfall totaled 6.5 inches overnight. North winds were sustained to 32 mph. The temperature dropped 41 degrees in 24 hours from a reading of 48 degrees at 8:00 pm on the 14th to only 7 degrees at 8:00 pm on the 15th.

In 1950…strong winds occurred in Boulder and Louisville. Winds in excess of 60 mph were recorded at Valmont. Minor damage was reported. Southwest winds gusted to 50 mph at Stapleton Airport.

In 1959…a total of 5.5 inches of snow fell at Stapleton Airport.

In 1992…snow spread from the mountains across metro Denver. The heaviest snow was across the northern portion of the area where 7 inches fell at Thornton. At Stapleton International Airport…only 3.4 inches of snowfall were recorded and northeast winds gusting to 37 mph caused some blowing snow on the 14th.

In 1999…high winds howled across metro Denver. In Commerce City…strong winds toppled 3 utility poles resulting in a power outage to 600 homes. High wind reports included: 108 mph at Wondervu…80 mph at the Hiwan Golf Course in Evergreen…76 mph at Aspen Springs…75 mph at the Jefferson County Airport near Broomfield…74 mph in Boulder…and 70 mph at Georgetown. West to northwest winds gusted to 48 mph…the highest wind gust of the month…and warmed the temperature to a high of 60 degrees at Denver International Airport on the 15th.

14-21

In 1930…a protracted cold spell occurred when low temperatures plunged below zero on 8 consecutive days. The coldest low temperatures of 20 degrees below zero on the 17th and 19 degrees below zero on the 16th were record minimums for the dates. High temperatures during the period ranged from 18 on the 18th to zero on the 20th. Two degrees on the 15th was a record low maximum temperature for the date.

» Click here to read the rest of January 13 to January 19: This week in Denver weather history

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January 2019 top shots: Monthly photo slideshow

Wednesday, January 16th, 2019 5:40pm MST
Stunning lenticular clouds at sunset over the Colorado Front Range. (David Canfield)

Stunning lenticular clouds at sunset over the Colorado Front Range. (David Canfield)

As one of our coldest months, January can be a good month to hibernate inside and avoid the outdoors.  But, like any month in Colorado, photo opportunities abound as our monthly slideshow demonstrates.

Snow is not normally dominant in the month but when it does fall, it can create a beautiful blanket of white.  Throw in the amazing sunrises and sunsets we receive in the middle of winter as well as wildlife and a host of other subjects and the imagery can be quite beautiful and stunning.

  • Slideshow updated January 16, 2019
  • 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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Increased clouds, temps above normal for Thornton’s Wednesday

Wednesday, January 16th, 2019 4:56am MST

A passing system will bring more snow to Colorado’s high country today. Here at lower elevations, we will continue to be warmer than normal but with a good bit of cloud cover.

Mostly cloudy skies start us off this morning and will continue throughout the day today. Winds will be out of the west and northwest and just a touch breezy in the afternoon. High temperatures should climb to around the 50 degree mark.

Tonight, partly clear skies will be above with lows in the mid-20s. Winds will become breezy in the late evening then settle down overnight.

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Tuesday to offer a good dose of sun, warmer than normal temps

Tuesday, January 15th, 2019 4:53am MST

Another nice, winter day for Thornton. We’ll continue to see a good bit of sun and temps will be above normal.

The day starts with clear skies then we see a few clouds appear this morning. Overall mostly sunny skies will be above for most of the day.

Temperatures will top out right near the 50 degree mark. The average high for today’s date is 44 degrees.

Tonight, clouds will be increasing with lows dipping to the mid-20s.

Keep an eye on current conditions with our live weather gauges here.

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Lots of sun, temps just a bit above normal for Thornton’s Monday

Monday, January 14th, 2019 5:01am MST

A nice looking start to the workweek for us. Clear skies will be above and mercury readings will be slightly warmer than normal.

Sunny skies will be the rule throughout the day today. We’ll have calm conditions and light winds out of the southwest. Temperatures will top out in the mid to upper 40s.

Tonight, skies remain clear with lows to the upper teens.

Most of the rest of the week will feature above normal temperatures and generally calm conditions. Our next storm system looks to arrive Friday and may bring a shot of snow.

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Thornton’s weekend starts cold and wet, will then dry out but remain chilly

Friday, January 11th, 2019 5:04am MST

Finally some much-needed moisture! We will see precipitation through the day today into tonight but then will dry out for Saturday and Sunday while remaining colder than normal.

For Friday, temps are starting out warmer than expected leading to more rain than snow. However, we do believe the air mass will cool giving us the white stuff. The ground is quite warm so any daytime accumulation will be confined to grassy areas.

As it continues into tonight though, some may start sticking to the roads. Total accumulations of a couple of inches are possible, perhaps more depending on the rain / snow mix and transition. A Winter Weather Advisory remains in effect until midnight.

Tonight, precipitation will taper off after midnight, ending before dawn tomorrow. Lows tonight will be in the mid-20s.

Saturday looks to be a relatively nice day albeit with some clouds and cool temps. Look for partly sunny skies above with highs in the upper 30s. Saturday night into Sunday, partly clear skies will be above with lows dropping to around 20 degrees.

Closing out the weekend, Sunday will bring mostly clear skies. Temps remain colder than normal with highs in the upper 30s.

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Thornton’s Thursday to offer one more day with unseasonably warm temps

Thursday, January 10th, 2019 5:10am MST

A pretty good looking day ahead for us with temperatures once again well above normal. Change is on the way though with cold and snow in the forecast for Friday.

Today starts out with mostly clear skies and we should see a good bit of blue above for much of the day. The afternoon is expected to bring a bit of an increase in cloud cover though. Temperatures will be topping out in the mid-50s with generally calm conditions.

Tonight, skies will be partly clear initially with increasing cloud cover through the night. Overnight lows will be in the mid to upper 20s.

A cold front will be arriving tonight and with it, an increase in moisture. Some light rain / snow will be possible after midnight.

The main part of the coming storm arrives around dawn tomorrow and will impact us for much of tomorrow. Temperatures will be much colder and we should see some accumulating snowfall. Models are highly varied on their solutions right now but the potential is there for Thornton to get an inch or two.

Enjoy today’s warm weather and keep an eye on http://www.thorntonweather.com for all the latest.

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Wednesday brings more clouds but warmer temperatures

Wednesday, January 9th, 2019 5:03am MST

Not too bad of a day ahead for Thornton as the mild conditions will continue. There will, however, be more cloud cover above.

We start out with partly clear skies and can expect more of the same throughout the day. Overall conditions will be calm, winds light. Temperatures will top out in the low 50s, above the average high for the date of 44 degrees.

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

Looking ahead, we’ll enjoy another mild day tomorrow then a glancing blow from a passing storm could bring some light snow Friday. More in the extended weather forecast here.

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

Tuesday, January 8th, 2019 8:15am MST
This week in Denver weather history

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

Extreme cold would be the first thing to come to your mind when you think of January. While there have been many such notable events of that nature, our look back at this week in Denver weather history actually is more remarkable for the damaging wind that has raked the area in the past.

From the National Weather Service:

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.

5-6

In 1940…snowfall totaled 5.9 inches in downtown Denver.

In 1975…high winds gusting to over 75 mph caused considerable damage in the Boulder area and minor damage in Jefferson County.

In Boulder…one home was unroofed… Several power lines were blown down…and a number of homes and commercial buildings were damaged. Northwest winds gusted to 36 mph on the 5th and 38 mph on the 6th at Stapleton International Airport.

In 1980…high winds in and near the foothills shattered windows…tore roofs from buildings…and caused many power outages. Much of the damage was in Boulder…where winds gusted to at least 82 mph. Wind gusts of 80 to 100 mph were common in the foothills. West winds gusted to only 37 mph at Stapleton International Airport on the 6th.

In 1982…2 to 6 inches of snow fell across metro Denver. Only 1.1 inches of snow were measured at Stapleton International Airport.

In 1983…high winds buffeted the foothills with gusts of 60 to 75 mph recorded in the Boulder area. West winds gusted to only 38 mph at Stapleton International Airport on the 6th.

In 1998…heavy snow blanketed the Front Range foothills. Snowfall totals included: 15 inches 8 miles north of Blackhawk; 13 inches at Evergreen and 5 miles east of Nederland; 12 inches in Coal Creek Canyon; 11 inches 8 miles west of Conifer; 10 inches in sunshine canyon northwest of Boulder; 10 inches 11 miles southwest of Morrison; 9 inches in south turkey canyon; and 8 inches at Eldora Ski Area. Snowfall totaled only 1.8 inches at the site of the former Stapleton International Airport.

6

In 1903…northwest winds were sustained to 45 mph with an extreme velocity of 48 mph. The Chinook winds warmed the temperature to a high of 66 degrees…which was a record maximum for the date. The low temperature dipped to only 35 degrees.

In 1962…strong winds caused nearly 14 hundred dollars in damage 2 miles north of Boulder. West-northwest Chinook winds gusted to 33 mph at Stapleton Airport in advance of a cold front that produced northeast wind gusts to 43 mph along with some blowing dust and 0.1 inch of snow.

In 1972…a wind gust to 69 mph was recorded at the National Bureau of Standards in Boulder. Only minor damage occurred. Northwest winds gusted to 33 mph at Stapleton International Airport.

In 2007…a large avalanche swept two vehicles off U.S. Highway 40…near Berthoud Pass…and partially buried them. The slide covered all three lanes of the highway. Eight people were in the vehicles…but only one person was seriously injured. He suffered several broken ribs. The slide was approximately 200 feet wide and 15 feet deep.

6-7

In 1908…furious high winds were noted in Boulder but caused only minor damage and injury.

In 1913…a very cold arctic air mass caused temperatures to plunge to record levels. The low temperature fell to 21 degrees below zero on the 6th and to 18 degrees below zero on the 7th…both records. The high temperature of only 8 degrees below zero on the 6th was a record low maximum for the date.

In 1920…post-frontal heavy snowfall totaled 7.0 inches in downtown Denver. North winds were sustained at 24 mph with gusts to 30 mph on the 6th.

In 1923…warm Chinook winds resulted in two temperature records. Low temperatures of 37 degrees on the 6th and 42 degrees on the 7th equaled the record high minimums for the dates. West winds were sustained to 30 mph with gusts to 33 mph on the 6th. Southwest winds were sustained to 47 mph with gusts to 52 mph on the 7th. High temperatures were 53 degrees on the 6th and 56 degrees on the 7th.

In 1986…2 to 4 inches of snow fell over metro Denver… With 5 to 8 inches in the foothills west of the city. The 2.4 inches of snowfall recorded at Stapleton International Airport was the only snowfall of the month. Northwest winds gusted to 24 mph at the airport.

In 2006…a brief warm spell resulted in two temperature records. High temperatures of 66 degrees on the 6th and 69 degrees on the 7th equaled the record daily maximum temperatures for each of those days. Low temperatures remained above freezing and were within 1 or 2 degrees of the record daily high minimums.

7

In 1911…west Chinook winds were sustained to 51 mph and warmed the temperature to a high of 56 degrees.

In 1994…occasional high winds buffeted the eastern foothills. Wind gusts to 99 mph were recorded at Rollinsville…southwest of Boulder. West winds gusted to 40 mph at Stapleton International Airport.

In 1995…a brief blast of high winds hit the eastern foothills and adjacent Front Range communities. A wind gust to 112 mph was recorded atop Squaw Mountain…west of Denver. In Boulder…winds gusted to 81 mph. West winds gusted to 31 mph at Stapleton International Airport.

In 2009…damaging downslope winds were responsible for triggering two wildfires that threatened the city of Boulder. Peak wind gusts ranged from 75 to 107 mph in and near the foothills of Boulder…Jefferson and Park counties. Although the fires never merged…they were close enough for firefighters to build a perimeter around both of them. The fires quickly torched 3000 acres and forced the evacuation of up to 1400 families. One home was destroyed along with several barns and outbuildings. Three firemen suffered minor injuries. In Bailey…power lines were downed by falling trees. A tin roof on an auto repair shop in town was almost completely blown off. Peak wind gusts included: 107 mph…3 miles south of Mt. Audobon…92 mph…3 miles south of Evergreen; 87 mph…6 miles northwest of Boulder; 81 mph…2 miles east-northeast of Bergen Park and at the National Wind Technology Center; 79 mph…4 miles northeast of Nederland; 77 mph…3 miles west of Sheridan; 75 mph at Genesee. A peak wind gust of 39 mph was measured at Denver international Airport from the west.

7-8

In 1911…gale force winds occurred in Boulder causing minor injuries.

In 1937…cold arctic air plunged temperatures below zero for an estimated 56 consecutuve hours. Two temperature records were set. High temperatures of 8 degrees below zero on the 7th and 3 degrees on the 8th were record low maximum readings for those dates. Low temperatures plunged to 12 degrees below zero on the 7th and 11 degrees below zero on the 8th. Snowfall was 1.4 inches in downtown Denver.

In 1969…a violent evening windstorm struck Boulder and the adjacent foothills. A wind gust to 130 mph was recorded at the National Center for Atmospheric Research. Winds reached 96 mph in downtown Boulder. The Boulder airport wind recorder was blown away after measuring a wind gust to 80 mph. The windstorm caused over one million dollars in damage and one fatality in Boulder. About 25 homes in south Boulder had roofs blown off or were severely damaged. Roofs were blown off buildings housing scientific laboratories and offices of the Environmental Science Services Administration…now NOAA…in Boulder…and installations of several scientific measuring sites near Boulder received heavy damage. Grass fires driven by the high winds endangered many areas…but were controlled by volunteer firemen. One man died from injuries received when he was blown from a fire truck. One man was killed and another injured when the truck camper in which they were riding was blown off I-25 about 10 miles north of Denver. In the same area a mobile home and a truck trailer were blown off the highway and demolished. At least 20 people in the Boulder area received light to serious injuries from flying debris or from being blown into obstructions. Power lines and trees were downed over a wide area. Damage was relatively light in the city of Denver…where northwest winds gusted to 62 mph at Stapleton International Airport on the 8th. Many windows were broken in Arvada…Englewood…and Littleton. A 27-year-old fire lookout tower on Squaw Mountain…west of Denver…was blown away…and several radio relay towers at that location were toppled. Trucks were overturned near Georgetown. Mobile homes were overturned in several areas with occupants receiving injuries in some cases. The strong Chinook winds also brought warm weather. The maximum temperature of 69 degrees on the 7th broke the old record of 65 degrees set in 1948. The temperature also reached 65 degrees on the 8th…but was not a record.

In 1992…an intense blizzard buried eastern parts of metro Denver. At times snow fell at rates of 2 to 3 inches an hour. Winds increased from the north at speeds of 25 to 45 mph. Drifts of 4 to 8 feet were common. I-70 was closed east of Denver…and I-25 was closed from Denver south. Snowfall totals ranged from a couple of inches in the foothills west of Denver to as much as 2 feet on the east side of metro Denver. The heaviest snow fell on the 7th in a band from the northern suburbs of Westminster and Thornton through Aurora and east Denver to southeast of Parker. Snowfall totals included: 22 inches in southeast Aurora…14.8 inches at Stapleton International Airport…13 inches in Northglenn…10 inches in Parker…and 9 inches in Westminster. The 14.5 inches of snowfall measured on the 7th into the 8th is the greatest 24 hour snowfall ever recorded in the city during the month of January. North winds gusting to 46 mph caused much blowing snow at Stapleton International Airport.

In 2000…high winds developed in and near the Front Range foothills. The strongest winds were generally confined to foothills areas north of I-70. A wind gust to 76 mph was reported in Golden Gate Canyon. West winds gusted to 37 mph at Denver International Airport on the 8th.

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.

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

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