Very heavy snow over Sierra Madre and Snowy Range with a storm total of over a foot of snow over the Snowy Range but a storm total snowfall of over 30 inches for the Sierra Madre Range.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CYS wrote it up.
Very heavy snow over Sierra Madre and Snowy Range with a storm total of over a foot of snow over the Snowy Range but a storm total snowfall of over 30 inches for the Sierra Madre Range.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Cheyenne, WY wrote its last area forecast discussion before the first event at Jan 1, 5:00 AM MST, 1 hour earlier.
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</html>Hazardous Weather Outlook National Weather Service Cheyenne WY 246 AM MST Wed Jan 1 2020 WYZ104>106-110-116>118-021000- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Laramie Range and Southwest Platte County- North Snowy Range Foothills-South Laramie Range- South Laramie Range Foothills-Central Laramie County- 246 AM MST Wed Jan 1 2020 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT A High Wind Warning is in effect until 11 AM for the Ferris, Seminoe and Shirley Mountains and the Shirley Basin. A High Wind Warning is in effect elsewhere until 8 PM this evening. Expect west winds of 30 to 45 mph with gusts to 65 mph. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Frequent windy periods are expected, especially Friday into early next week. .Spotter information statement... Spotter activation will not be needed. WYZ109-111-113-115-021000- Central Carbon County-Southwest Carbon County- Upper North Platte River Basin-Laramie Valley- 246 AM MST Wed Jan 1 2020 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Scattered to numerous snow showers will occur today into the evening hours. Gusty west winds will produce areas of blowing snow and reduced visibilities. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Frequent windy periods are expected, especially Friday into early next week. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-WYZ101>103-107-108-119-021000- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux-Converse County Lower Elevations- Niobrara County-North Laramie Range-East Platte County- Goshen County-East Laramie County- 246 AM MST Wed Jan 1 2020 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Today will be quite windy in some locations with west winds of 25 to 35 mph with gusts of 40 to 50 mph. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Frequent windy periods are expected, especially Friday into early next week. .Spotter information statement... Spotter activation will not be needed. WYZ112-114-021000- Sierra Madre Range-Snowy Range- 246 AM MST Wed Jan 1 2020 This hazardous weather outlook is for portions of south central Wyoming. .DAY ONE...TODAY AND TONIGHT A Winter Storm Warning is in effect. Snow, heavy at times, will occur. Winds gusting as high as 60 mph will produce areas of blowing snow and near zero visibilities at times. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY The Winter Storm Warning continues through Thursday afternoon. Snow, heavy at times will occur, with total accumulations of 15 to 24 inches. Frequent windy periods are expected, especially Friday into early next week. .Spotter information statement... Spotter activation will not be needed. Rubin
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</html>The national radar mosaic for the moment the first event began.
2 heavy snow. Local standard time, as filed.
South Brush Creek reported 13.5 inches of snow northwest of Ryan Park.
Sensor located 1 mile northwest of Whiskey Park reported 14.4 inches of snow at 1/1/20 at 12PM. Storm total snowfall of 32.4 inches through 1/2/2020 6AM.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2020Every state in 2020This day in weather historyWarnings in Wyoming, January 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 865109, 865110.