As we enter the latter half of April the weather history calendar starts to reflect shift in the type of weather events we see. There are still plenty of significant snowfall events. However spring severe weather starts to appear with greater frequency including heavy rain, hail and even tornadoes.
From the National Weather Service:
13-17
In 2001…a huge dust storm over southern and Inner Mongolia during April 3rd through the 6th lifted desert dust into the jet stream. This dust cloud moved over metro Denver on the 13th and persisted through the 17th. The cloud created widespread haze…giving the sky a milkish cast due to the scattering of incoming solar radiation.
15-16
In 1900…heavy rainfall totaled 2.33 inches. A trace of snow was mixed with the rain at times.
In 1950…thunderstorms and heavy rain behind a cold front produced 2.13 inches of rain in 24 hours at Stapleton Airport.
In 2003…a fast moving pacific storm system moved across Colorado allowing strong winds to develop over the eastern foothills and metro Denver. Northwest winds gusted to 59 mph at Denver International Airport late in the evening of the 15th.
15-17
In 1922…heavy snowfall totaled 9.0 inches in downtown Denver. Most of the snow…6.0 inches…fell on the 16th. This was the third major snow storm in a week. Northwest winds were sustained to 43 mph with gusts to 47 mph on the 15th.
16
In 1960…a wind storm struck all of metro Denver. Estimated wind gusts up to 80 mph were registered in Boulder. At Stapleton Airport sustained west-northwest winds over 50 mph with gusts as high as 70 mph produced some blowing dust. The high winds damaged buildings…power and telephone lines…and signs. Five people were injured in metro Denver as a result of the wind storm. Blowing dust reduced visibility at times. The winds were strong and gusty for most of the day.
16-17
In 1944…heavy snowfall totaled 7.5 inches in downtown Denver. Northwest winds were sustained to 18 mph on the 16th.
16-18
In 2009…a potent spring storm brought heavy snow to locations in and near the Front Range foothills. A deep easterly upslope produced nearly 5 feet of snow in parts of the foothills. The heavy snow resulted in the closure of Interstate 70…from Golden west to Vail…for approximately 16 hours. The heavy snow snapped power lines in Evergreen and Nederland. The ensuing outages affected 14200 residents. In the Front Range foothills…storm totals included: 56 inches…3 miles south of Rollinsville; 54 inches…3 miles southeast of Pinecliffe…43 inches at Aspen Springs…42 inches at Evergreen…38 inches near conifer; 37 inches at St. Mary’s glacier…and 34 inches near Nederland. Along the urban corridor and Palmer Divide…the heaviest snow occurred above 5500 feet on the 17th. Storm totals included: 22 inches…8.5 miles southwest of Franktown; 18 inches…10 miles south-southeast of Buckley Air Force Base; 17 inches near Cherry Creek and 7 miles south of Sedalia… 16 inches…6.5 miles southwest of Castle Rock; 15 inches near Beverly Hills; 12 inches near Highlands Ranch and Lafayette…with 11 inches in Broomfield. Elsewhere storm totals ranged from 4 to 10 inches. Officially…only 2.6 inches of snow was observed at Denver International Airport. The 24-hr precipitation for the day however was 1.16 inches… Which established a new record for April 17th.
17
In 1889…northwest winds were sustained to 48 mph.
In 1899…apparent post-frontal north winds were sustained to 42 mph with gusts as high as 48 mph.
In 1935…light dust moved over the city behind an apparent dry cold front…which produced northeast winds to 19 mph with gusts to 20 mph.
In 1978…winds estimated to 70 mph occurred in Morrison. Northwest winds gusted to 49 mph at Stapleton International Airport.
In 2000…strong pre-frontal winds and widely scattered thunderstorms caused high winds to develop across northern metro Denver and portions of the northeast plains. Peak wind gusts included 75 mph at Louisville. South winds gusted to only 28 mph at Denver International Airport.
In 2002…strong southwest winds in advance of a cold front gusted to 52 mph at Denver International Airport.
In 2003…severe thunderstorms produced 1 inch diameter hail 7 miles east of Brighton. Strong thunderstorm winds blew out an auto windshield near Denver International Airport where south winds gusted to 48 mph.
17-18
In 1878…the wind blew violently all day on the 17th with a maximum sustained velocity of 40 mph. Dust hung over the city like a cloud. The relative humidity was zero nearly all day. A terrific gale blew overnight. There was much damage to buildings…signs…fences…etc. Some wind gusts were so strong as to jar buildings to their foundations. The station anemometer recorded sustained winds to 50 mph with higher gusts before it was damaged by the winds. The winds moderated during the day on the 18th and ended at sunset.
In 1894…post-frontal rain changed to snow on the 17th around sunrise and continued through 9:00 am on the 18th. Snowfall totaled 10.5 inches…but most of the snow melted as it fell. The high temperature warmed to only 35 degrees on the 17th after a high of 76 on the 16th. Northeast winds were sustained to 30 mph with gusts to 32 mph on the 17th.
In 1998…more spring snow fell across metro Denver and in the foothills. Snowfall totals included: 11 inches at Golden Gate Canyon; 10 inches at Highlands Ranch; 9 inches at Elizabeth; 8 inches at Broomfield and Morrison; and 7 inches at Chief Hosa…Evergreen…Littleton…and Sedalia. Snowfall totaled only 3.2 inches at the site of the former Stapleton International Airport. North winds gusted to 22 mph at Denver International Airport.
17-19
In 1920…snow fell across the city continuously for 57 hours… From the early morning of the 17th until 11:40 am on the 19th. The heavy wet snowfall totaled 18.2 inches with the greatest accumulation on the ground of 12 inches. Winds during the storm were strong with sustained speeds in excess of 27 mph for over 40 consecutive hours…which created near-blizzard conditions. The highest recorded wind speeds were 44 mph with gusts to 50 mph from the north on the 17th and 39 mph with gusts to 48 mph from the northwest on the 18th. The strong winds piled the snow into high drifts which stopped all Denver traffic. Railroads were blocked with only one train entering the city on the 19th. All interurban trains were blocked…as were the 13 trolley lines. Thus…many workers were unable to get home at night and filled all of the downtown hotels to capacity. No grocery or fuel deliveries were possible… Except milk and coal to hospitals and to families with babies. No lives were lost in the city…but several people perished in surrounding districts. Stock losses were heavy on the plains. Temperatures during the storm were in the 20’s.
18
In 1877…strong winds blew all day with an average sustained velocity of 36 mph. The maximum sustained velocity was 60 mph. No significant damage was reported.
In 1903…northwest winds were sustained to 48 mph with gusts to 53 mph.
In 1936…light dust spread over the city from the east on southeast winds gusting to 25 mph. The surface visibility was reduced to about 2 miles at times.
In 1940…this date marked the start of the longest period without snow…200 days…through November 3…1940. A trace of snow fell on both April 17…1940…and November 4…1940.
In 1963…strong winds were prevalent all day across metro Denver. West-northwest winds gusting to 60 mph produced some blowing dust at Stapleton Airport.
In 1971…a microburst wind gust to 59 mph produced some blowing dust at Stapleton International Airport.
In 1978…high winds caused much blowing dust over the plains. Wind gusts from 80 to 96 mph were reported in Boulder with 80 mph measured on Lookout Mountain. Northwest winds gusted to 43 mph at Stapleton International Airport.
In 2000…high winds developed in the foothills of Boulder County. Peak wind gusts included 71 mph at the National Center for Atmospheric Research mesa lab near Boulder. In Aurora…three workers were injured when strong winds caused a home under construction to partially collapse. Two received minor injuries…while the third worker had to be hospitalized with severe back injuries. South winds gusted to 47 mph at Denver International Airport.
In 2002…strong northeast winds behind a cold front gusted to 53 mph at Denver International Airport where some blowing dust briefly reduced the visibility to 3 miles.
Continue reading April 16 to April 22: This week in Denver weather history