Alert archive / Wyoming / Winter Weather Advisories in 2021

Winter Weather Advisory 30, NWS Cheyenne, WY

April 27, 2021Albany County, Carbon County, Laramie County, Wyoming

NWS Cheyenne, WY issued this winter weather advisory at Apr 27, 2021, 2:34 AM MDT for Albany County, Carbon County, Laramie County, Wyoming. It took effect at Apr 27, 2021, 12:00 PM MDT. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued
Apr 27, 2021, 2:34 AM MDT (08:34 UTC)
In effect from
Apr 27, 2021, 12:00 PM MDT
Expired
Apr 28, 2021, 6:00 AM MDT
In force
18 hr
Issued by
NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 93 km from the middle of the area, began a volume at 08:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this winter weather advisory went out, 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 this winter weather advisory went out at Apr 26, 11:29 PM MDT, 3 hours 5 minutes earlier.

Area forecast discussion, Apr 26, 11:29 PM MDT, 3 hours 5 minutes before
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Hazardous weather outlook, Apr 26, 4:35 AM MDT, 21 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Cheyenne WY
435 AM MDT Mon Apr 26 2021

WYZ104-105-109>111-113-115-271030-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Upper North Platte River Basin-
Laramie Valley-
435 AM MDT Mon Apr 26 2021

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Strong southwest winds will develop this morning and persist until
shortly after sunset this evening. Gusts of 55 to 65 mph are likely.
High Wind Warnings are in effect until 9 PM.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Widespread lower elevation rain showers and higher elevation snow
showers are forecast both Tuesday and Tuesday night. Isolated
thunderstorms are possible Tuesday afternoon. Snow accumulations
up to two inches are expected.

.Spotter information statement...

Spotter activation will not be required.

WYZ112-114-116-271030-
Sierra Madre Range-Snowy Range-South Laramie Range-
435 AM MDT Mon Apr 26 2021

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Rain showers will develop along a cold front late this afternoon,
then change to snow showers tonight as snow levels drop to 7500
feet. Up to an inch of snow is expected.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Widespread snow showers are forecast both Tuesday and Tuesday night.
Isolated thunderstorms are possible Tuesday afternoon. Snow may be
moderate to heavy at times. Snow accumulations will range from 3
to 5 inches Interstate 80 Summit, 4 to 6 inches Sierra Madre Range,
and 6 to 10 inches Snowy Range.

.Spotter information statement...

Spotter activation will not be required.

WYZ101>103-106>108-117>119-271030-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
435 AM MDT Mon Apr 26 2021

This hazardous weather outlook is for portions of east central
Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Warm temperatures, gusty winds and low humidities will result in
near critical fire weather conditions this afternoon.

Rain showers will spread west to east across the area tonight
following the passage of a cold front.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Widespread rain showers are forecast both Tuesday and Tuesday night.
Rain may mix with snow or change to snow for elevations above 6000
feet Tuesday night. Widely scattered thunderstorms will develop
Tuesday afternoon, with a few stronger storms possible over central
and eastern Laramie County.

.Spotter information statement...

Spotter activation will not be required.

NEZ002-003-019>021-054-055-095-096-271030-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
435 AM MDT Mon Apr 26 2021

This hazardous weather outlook is for the western Nebraska
Panhandle.

.DAY ONE...TODAY AND TONIGHT

Warm temperatures, gusty winds, low humidities, and ground fuels
conducive for rapid fire growth will create critical fire weather
conditions this afternoon. A Red Flag Warning is in effect from
11 AM this morning through 7 PM this evening.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Widespread rain showers are forecast both Tuesday and Tuesday night.
Widely scattered thunderstorms will develop Tuesday afternoon, with
a few stronger storms possible over the southern Panhandle.

.Spotter information statement...

Spotter activation will not be required.

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 27, 2:34 AM MDTWinter Storm WarningCYSAlbany, Carbon27 hr
Apr 27, 2:00 PM MDTSpecial Weather StatementCYSAlbany30 min

Nearby

Winter Weather Advisories in Wyoming, 2021Every winter weather advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.