Special Weather Statement
Special Weather Statement
National Weather Service Riverton WY
525 AM MDT Tue Apr 20 2021
WYZ008-009-201800-
Bighorn Mountains West-Bighorn Mountains Southeast-
525 AM MDT Tue Apr 20 2021
...Scattered snow showers will create difficult travel conditions
this morning...
This is a special weather statement from the National Weather
Service Office in Riverton.
* WHAT...Snow and blowing snow.
* WHERE...Bighorn Mountains, including across Powder River Pass.
* WHEN...Through noon today.
* ADDITIONAL DETAILS...Powder River Pass may be slick and snow
covered, creating difficult travel conditions. Snow and blowing
snow will significantly reduce visibility. Use caution if
traveling.
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service North Platte NE
1015 AM CDT Tue Apr 20 2021
NEZ004>010-022>029-035>038-056>059-069>071-094-211515-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
1015 AM CDT Tue Apr 20 2021 /915 AM MDT Tue Apr 20 2021/
This Hazardous Weather Outlook is for portions of western and
north central Nebraska.
.DAY ONE...TODAY AND TONIGHT.
Scattered rain and snow showers will continue into the evening
hours today. No hazardous weather is expected with this system.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed through tonight.
&&
Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte
$$
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
502 AM MDT Tue Apr 20 2021
COZ030>051-211115-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
502 AM MDT Tue Apr 20 2021
This hazardous weather outlook is for northeast and north central
Colorado.
.DAY ONE...Today and Tonight
Roads will likely be slick this morning after last night`s snow
and this morning`s very cold temperatures. Mostly clear skies
early today, then a few snow showers over the far northeastern
corner this afternoon, then over the mountains overnight. Little
to no accumulation is expected.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Light snow is likely in the mountains again on Wednesday and
Wednesday night. Accumulations of 1 to 4 inches are expected. On
the plains there is a chance of light snow, possibly mixed with
rain Wednesday afternoon. Any accumulation should be an inch or
less. There will be a warming trend Thursday and Friday, but still
a chance of snow showers in the mountains and a slight chance of
rain showers on the plains. A few thunderstorms are also possible
Friday afternoon. The weekend will be warm and dry.
.SPOTTER INFORMATION STATEMENT...
Spotter reports will not be needed today or tonight.
$$
Kriederman/Gimmestad
Hazardous Weather Outlook
National Weather Service Cheyenne WY
501 AM MDT Tue Apr 20 2021
NEZ019-020-054-055-WYZ101-103>119-211115-
Scotts Bluff County-Banner County-Kimball County-Cheyenne County-
Converse County Lower Elevations-North Laramie Range-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
501 AM MDT Tue Apr 20 2021
This hazardous weather outlook is for the southern Nebraska
panhandle and southeast Wyoming.
.DAY ONE...TODAY AND TONIGHT
Patchy dense fog across the high valleys early this morning will
lift by noon. Isolated snow showers are possible in the afternoon,
mainly across the mountains and east of Interstate 25.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
The probability for widespread hazardous weather is low.
.Spotter information statement...
Spotter activation will not be required.
$$
Hazardous Weather Outlook
National Weather Service Cheyenne WY
501 AM MDT Tue Apr 20 2021
NEZ002-003-021-095-096-WYZ102-211115-
Dawes County-Box Butte County-Morrill County-
Northern Sioux County-Southern Sioux County-Niobrara County-
501 AM MDT Tue Apr 20 2021
This hazardous weather outlook is for the northern Nebraska
panhandle and far eastern Wyoming.
.DAY ONE...TODAY AND TONIGHT
Scattered to numerous snow showers are expected, especially in the
afternoon. Up to one inch of snow accumulation possible in the
heaviest showers, mainly on the elevated and grassy surfaces.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
The probability for widespread hazardous weather is low.
.Spotter information statement...
Spotter activation will not be required.
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
458 AM MDT Tue Apr 20 2021
SDZ001-002-012>014-025>032-041>044-046-047-049-072>074-WYZ054>056-
058-071-211300-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Foot Hills-Rapid City-Southern Foot Hills-
Central Black Hills-Southern Black Hills-Custer Co Plains-
Pennington Co Plains-Haakon-Fall River-Oglala Lakota-Jackson-
Bennett-Mellette-Todd-Tripp-Sturgis/Piedmont Foot Hills-
Southern Meade Co Plains-Hermosa Foot Hills-Northern Campbell-
Southern Campbell-Western Crook-Weston-Northeastern Crook-
458 AM MDT Tue Apr 20 2021 /558 AM CDT Tue Apr 20 2021/
This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.
.DAY ONE...Today and Tonight
Snow showers could produce brief, localized reductions in
visibilities and slick spots on roadways today into tonight.
Widespread hazardous travel conditions are not anticipated.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today.
&&
Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
458 AM MDT Tue Apr 20 2021
SDZ024-WYZ057-211300-
Northern Black Hills-Wyoming Black Hills-
458 AM MDT Tue Apr 20 2021
This Hazardous Weather Outlook is for portions of the Black Hills
of South Dakota...and the Black Hills of Wyoming.
.DAY ONE...Today and Tonight
Snow showers this morning through the afternoon could produce
additional snowfall accumulations of 1 to 3 inches. Low
visibilities and slippery roads as a result of the snow may lead
to hazardous travel conditions this morning.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today.
&&
Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity
$$
Hazardous Weather Outlook
National Weather Service Grand Junction CO
413 AM MDT Tue Apr 20 2021
COZ001>014-017>023-UTZ022>025-027>029-211015-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-
Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide-
Northwest San Juan Mountains-Southwest San Juan Mountains-
Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
413 AM MDT Tue Apr 20 2021
This hazardous weather outlook is for eastern Utah and western
Colorado.
.DAY ONE...Today and Tonight
Critical fire weather conditions will occur across the lower
elevations of southwest Colorado today. Otherwise, dry and cooler
conditions with lighter winds than yesterday.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Gusty winds and dry conditions will lead to critical fire weather
conditions across the lower elevations of southeast Utah and
southwest Colorado Wednesday. A few disturbances will bring
occasional showers to the higher elevations through Friday with
light snow accumulations possible. Temperatures warm to above
normal levels by the weekend.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Riverton WY
314 AM MDT Tue Apr 20 2021
WYZ001>020-022>030-211200-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
314 AM MDT Tue Apr 20 2021
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and Tonight.
Lingering snow showers across the Bighorns and northern Johnson
County will be limited in extent and will gradually end this
afternoon.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions, according to standard operating procedures.
$$
