Our look back at this week in Denver weather history contains many of the types of events we would expect to find. Periods of extended arctic chill, heavy snowstorms and damaging wind events.
From the National Weather Service:
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.
1-9
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.
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.
6-10
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.
8-9
In 1898…rain changed rapidly to snow during the late evening of the 8th and continued through the early afternoon of the 9th. Snowfall totaled 6.0 inches in the city. Northeast winds were sustained to 26 mph with gusts to 30 mph on the 8th.
In 2001…heavy snow fell across metro Denver mainly in and near the eastern foothills. Snow totals included: 12 inches atop Crow Hill and near Evergreen; 10 inches in Evergreen and near Morrison; 9 inches at Genesee; 8 inches atop Lookout Mountain and near Littleton and Bailey; 6 inches at Arvada and Ken Caryl Ranch; and 5 inches in Broomfield…Chief Hosa… And Thornton. Snowfall totaled 5.1 inches at the site of the former Stapleton International Airport. Temperatures dipped to 15 degrees below zero at Denver International Airport on the morning of the 9th…setting a new record minimum for the date.
In 2002…high winds in the foothills on the 8th spread over the plains on the 9th and caused much blowing dust and snow and blizzard conditions east and northeast of metro Denver. I-70 was closed from just east of Denver to the Kansas state line. Zero visibilities coupled with snowpacked and slick roads caused multiple car accidents in southern weld County. High winds developed in the foothills on the 8th with gusts to 71 mph on Rocky Flats and to 75 mph at the National Center for Atmospheric Research mesa lab in Boulder. The high winds continued on the 9th with gusts to 83 mph near Fritz Peak…70 mph at Evergreen…and 67 mph at Parker. Northwest winds gusted to 55 mph on the 8th and to 58 mph on the 9th at Denver International Airport where the surface visibility was reduced to as low as 1 mile in blowing dust on the 9th.
In 2008…strong downslope winds developed in and near the Front Range foothills. Peak gusts included: 88 mph at Georgetown…85 mph at Berthoud Pass…81 mph at the NCAR Mesa Lab…78 mph at the national wind technology center… At 76 mph at Floyd Hill. At Denver International Airport… Gusty west winds to 48 mph were observed on the 8th.
9
In 1886…north winds were sustained to 42 mph…the highest winds of the month that year.
In 1893…northwest bora downslope winds were sustained to to 40 mph with gusts as high as 70 mph in the city.
In 1960…the lowest pressure reduced to sea level ever recorded in Denver…28.83 inches (976.4 mb.)…occurred. The actual station pressure of 23.770 inches was also the lowest ever recorded.
In 1967…northwest winds gusted to 51 mph at Stapleton International Airport. Winds were strong and gusty all day.
In 1988…high winds occurred in and near the foothills. Winds gusted to 96 mph in east Boulder. As many as 1600 homes lost power when wires were downed by the wind. Some windows were blown out of cars near Rocky Flats south of Boulder where winds were clocked at 85 mph. In Broomfield…winds were recorded to 68 mph at Jefferson County Airport.
In 2009…high winds occurred in and near the foothills of Boulder and northern Jefferson counties. Peak wind gusts included 81 mph at the national wind technology center and 6 miles northwest of Boulder.
9-10
In 1934…rain changed to heavy snow on the afternoon of the 9th and continued through the day on the 10th. Snowfall totaled 7.4 inches in downtown Denver. North winds were sustained to 24 mph on the 10th.
In 1972…heavy post-frontal snowfall totaled 6.2 inches at Stapleton International Airport where northeast winds gusted to 46 mph on the 9th. Temperatures plunged from a high of 51 degrees on the 9th to a low of 16 on the morning of the 10th.
In 1981…the season’s coldest arctic air mass rolled into metro Denver plunging temperatures from 10 below to 20 degrees below zero. Bitter north winds gusting as high as 36 mph sent wind chill temperatures to 50 below zero. Two to four inches of snow fell over metro Denver with 6 to 12 inches in the foothills. A Boulder man died of hypothermia while cross country skiing in the mountains west of the city. Snowfall totaled only 1.5 inches at Stapleton International Airport where the minimum temperature on the morning of the 10th was 5 degrees below zero. The temperature that day warmed to a high of only 9 degrees.
In 2003…high winds occurred in and near the eastern foothills. The highest wind gusts recorded: included 80 mph atop Fritz Peak and 73 mph atop Blue Mountain and at the National Wind Technology Center on Rocky Flats south of Boulder. At least 4 multi-car accidents occurred along State Highway 93…between Golden and Boulder when blowing snow caused whiteout conditions. Northwest winds gusted to 36 mph at Denver International Airport on the 10th.
9-11
In 1965…heavy snowfall totaled 6.2 inches at Stapleton International Airport where northeast winds gusted to 25 mph.
In 1993…the same storm that dumped heavy snow in the mountains combined with an arctic cold front to produce heavy snow across metro Denver. Upslope snows of 4 to 8 inches were common with some areas receiving nearly a foot. Ten inches of new snow were measured in Parker and 7 inches in southeast Denver. At Stapleton International Airport… Snowfall totaled 8.1 inches. Strong winds combined with the snowfall to produce near-blizzard conditions over the plains closing many roads east of Denver. North winds gusted to only 18 mph at Stapleton International Airport on the 9th.
10
In 1890…north winds were sustained to 48 mph with gusts as high as 60 mph behind an apparent cold front. Light snow also fell.
In 1932…a large cumulo-nimbus thunderhead was observed in the eastern sky at 4:00 pm. Thunderstorms are relatively rare in February.
In 1990…northwest winds gusted to 52 mph at Stapleton International Airport. The strong Chinook winds warmed the temperature to a high of 56 degrees.
In 1999…a vigorous cold front moved a wall of blowing dust across the plains of northeastern Colorado during the afternoon and early evening hours. While the strongest winds and wind damage were north and east of metro Denver… North to northeast winds did gust to 48 mph at Denver International Airport…reducing the visibility to as low as 3/4 mile in blowing dust. The temperature dropped as much as 15 degrees in 5 minutes and 21 degrees in 30 minutes following the passage of the cold front. Dangerous wind shear conditions at DIA delayed several flights…while others were redirected to Colorado Springs. In the Montbello area of northeast Denver…the strong winds blew the roof off a building. Downed power lines sparked a small brush fire…which burned about 10 acres near the former Fitzsimmons Army Medical Center.
Continue reading February 9 to February 15: This Week in Denver Weather History
February in Colorado typically brings to an end an extended period when average temperatures are at their lowest. Winter begins to loosen its grip and temperatures get warmer but precipitation is not a particularly common event during the month.
