Chance of snow early in the evening...then snow likely overnight. Snow accumulation of 1 to 2 inches. Lows around 18. East winds 10 to 15 mph. Chance of snow 70 percent.
Wednesday
Snow...possibly heavy. Areas of blowing snow. Snow accumulation 3 to 6 inches possible. Highs in the mid 20s. North winds 15 to 25 mph.
... Winter Storm Warning in effect from 8 PM Tuesday to 5 PM MST Thursday...
The National Weather Service in Denver has issued a Winter Storm Warning for snow and blowing snow... which is in effect from 8 PM Tuesday to 5 PM MST Thursday. The Winter Storm Watch is no longer in effect.
* Timing... snow will develop Tuesday evening and may become heavier Wednesday and Wednesday night. Snow will then taper off Thursday.
* Accumulation/wind... snow accumulations of 5 to 10 inches are expected. North to northeast of winds are expected to increase to 10 to 20 mph with gusts to 30 mph Tuesday night and Wednesday will increase to 20 to 35 mph with gusts to 50 mph Wednesday night and Thursday.
* Main impact... snow and blowing snow will cause restricted visibilities. Roads and highways are expected to become snow covered with hazardous and slow travel conditions... and Road closures are possible.
* Other impacts... much colder temperatures will combine with the strong winds to drop wind chill readings below zero.
Precautionary/preparedness actions...
People planning travel across northeast Colorado should be prepared for hazardous driving conditions. Visibilities will be reduced to less than a quarter mile at times due to falling and blowing snow. If you must travel... take along a winter survival kit.
Public Information Statement
Statement as of 2:59 am MST on December 22, 2009
... Today in Metro Denver weather history...
17-24 in 1924... a prolonged cold spell occurred after mild temperatures during the first half of the month. Most low temperatures dipped below zero with the coldest reading of 15 degrees below zero occurring on the 24th. The high temperature of only 5 degrees on the 18th was a record low maximum for the date. 18-24 in 1998... a vigorous cold front with north winds gusting as high as 38 mph at Denver International Airport on the 18th dropped temperatures from a high of 51 degrees to a low of just 6 degrees before midnight. The Arctic air mass that settled over Metro Denver produced intermittent light snow and a week-long protracted cold spell that caused low temperatures to plunge well below zero for 6 consecutive nights. The coldest temperature was 19 degrees below zero on the morning of the 22nd. High temperatures climbed only into the single digits on 4 consecutive days... from the 19th through the 22nd. At least 15 people... mostly homeless... were treated for hypothermia at area hospitals. The bitter cold weather was responsible... either directly or indirectly... for at least 5 fatalities. Three of the victims died directly from exposure. The cold weather also caused intermittent power outages. Following the cold snap... thawing water pipes cracked and burst in several homes and businesses... causing extensive damage. Only one temperature record was set. The high temperature of only 7 degrees on the 19th set a record low maximum for the date. 19-23 in 1990... a surge of very cold Arctic air invaded Metro Denver. Many temperature records were broken as the Mercury remained at or below zero for 85.5 hours at Stapleton International Airport... making it the third longest period of subzero readings in 118 years of record keeping. On the morning of the 22nd... the Mercury plunged to 25 degrees below zero... which equaled the all time record low temperature for the month set on December 24... 1876. In the foothills southwest of Denver at Tiny Town... the Mercury plunged to 33 degrees below zero on the morning of the 21st. On the same morning at Castle Rock the temperature dipped to 26 degrees below zero. During the period... other daily temperature records were set at Denver... including: record low maximum of 3 degrees below zero on the 20th and a record low of 17 degrees below zero on the 23rd. The record low was equaled with 16 degrees below zero on the 20th and 21 degrees below zero on the 21st. Snowfall totaled 2.7 inches at Stapleton International Airport from the 19th through the 21st. 20-22 in 1933... strong downslope winds produced a warm spell. Low temperatures of 43 degrees on both the 20th and 21st and 41 degrees on the 22nd were record high minimums for those dates. High temperature of 67 degrees on the 21st was a record maximum for the date. High temperatures of 56 degrees on the 20th and 69 degrees on the 22nd were not records; however... the 69 degrees was the warmest of the month. West to northwest winds were sustained to 20 and 24 mph on the 21st and 22nd respectively. 20-23 in 1918... light snowfall on each day totaled 12.0 inches over downtown Denver. Northeast winds were sustained to 16 mph on the 21st. 20-25 in 1983... an extremely bitter cold spell occurred. The temperature remained below zero for 115 hours in Denver... the longest sub-zero period on record. The Mercury dipped to 21 degrees below zero on the 21st... the coldest recorded temperature in over 20 years. The cold was accompanied by winds that plunged chill factors to 50 to 70 degrees below zero. Two people froze to death in denver; both were found outside dead of exposure. Numerous cases of frostbite were reported. Hundreds of water pipes broke from the intense cold... water mains and natural gas lines also fractured... and electricity consumption reached record levels. Light snow totaling 5.8 inches fell at times... and Holiday traffic was delayed at Stapleton International Airport for several hours. Eight daily temperature records were set at the time. The all-time record low maximum temperature for the month of 8 degrees below zero on the 21st still stands today. Other temperature records still standing include record low maximum temperatures of 5 degrees below zero on both the 22nd and 23rd and 4 degrees below zero on the 24th. 21-22 in 1969... strong winds raked the eastern foothills in Boulder and Jefferson counties. Wind gusts to 115 mph were recorded at the National center for atmospheric research in Boulder... while in downtown Boulder winds gusted to 75 mph. Some damage occurred. In 1981... a snow storm dumped 3 to 8 inches of snow across eastern Colorado. Snowfall totaled 6.8 inches at Stapleton International Airport where north winds gusted to only 17 mph. 21-23 in 1924... heavy snowfall totaled 7.9 inches over downtown Denver. During the storm north to northeast winds were sustained to 21 mph. Temperatures were quite cold... ranging from a high of 24 degrees on the 21st to a low of 5 degrees below zero on the 23rd. In 1964... high winds were recorded along the eastern foothills. A wind gust to 100 mph was registered at Jefferson County Airport near Broomfield. In Boulder... where many thousands of dollars in damage occurred... warm Chinook winds gusted in excess of 45 mph downtown. A wind gust to 82 mph was recorded at the National center for atmospheric research in Boulder. Heavy damage to power lines... homes... and roads was reported at Evergreen... Golden... and Boulder. Several people were injured by wind-caused accidents. West winds gusted to 53 mph on the 22nd and to 51 mph on the 23rd at Stapleton International Airport where some blowing dust occurred. The Chinook winds warmed temperatures in Denver to highs of 68 degrees on the 22nd and 71 degrees on the 23rd. 22 in 1885... a windstorm produced sustained west winds to 48 mph. The winds were strong all afternoon and evening. In 1892... terribly strong winds hit the foothills above Boulder. The wind was described as a Young tornado... but likely was straight line in nature. Winds in Boulder remained calm. In 1901... the passage of an apparent cold front produced north winds sustained to 48 mph with gusts as high as 60 mph. In 1922... a major storm dumped 8.0 inches of snow in downtown Denver. In 1941... Post-frontal heavy snow fell over downtown Denver where 8.0 inches of new snow were measured. Northwest winds were sustained to 26 mph. The cold front and snowfall abruptly broke a week of warm weather with high temperatures in the 50's and 60's. In 1977... high winds unroofed a Mobile home in Broomfield. Wind gusts reached 93 mph at Table Mesa in south Boulder and 74 mph at Rocky Flats. West winds gusted to 52 mph at Stapleton International Airport. In 1988... high winds hit many foothills areas. Recorded wind gusts reached 95 mph just north of Boulder and 80 mph on Table Mesa. The strong winds caused power outages around Boulder. West winds gusted to 45 mph at Stapleton International Airport. In 1990... the all-time lowest recorded temperature in December... 25 degrees below zero... occurred. The same temperature was also reached on December 24... 1876. 22-23 in 1926... snow was heavy and totaled 6.7 inches in downtown Denver. Northeast winds were sustained to 17 mph with gusts to 18 mph on the 23rd. In 1979... heavy snow blanketed Metro Denver. Total snowfall at Stapleton International Airport was 6.9 inches... and north winds gusted to 20 mph. Most of the snow... 5.7 inches... fell on the 22nd. In 1984... strong Chinook winds howled along the Front Range foothills. At Table Mesa in southwest Boulder... gusts reached 108 mph on the morning of the 23rd. Gusts to 79 mph were clocked in Golden Gate Canyon. Gusts to 94 mph were reported in east Boulder. The winds flattened a two floor cinder block building under construction in Boulder... causing 75 thousand dollars damage. Flying debris from the building slightly injured a policeman. A chain link fence was blown down. Dozens of windows and roofs were damaged in Boulder... along with Mobile homes and cars. Numerous trees and power lines were downed. A giant plastic bubble dome was blown apart and collapsed... causing at least 100 thousand dollars damage. West winds gusted to 41 mph at Stapleton International Airport on the 23rd.