Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
729 AM MDT Wed May 21 2025
WYZ001>020-022>030-221300-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn 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-
729 AM MDT Wed May 21 2025
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and Tonight.
Higher elevations of northern Wyoming, mainly above 8000 feet, may
see periodic snow showers with little to no snow accumulation.
Isolated thunderstorms are possible along and north of a line from
Cody to Thermopolis to Casper during the afternoon and early evening.
West wind 20 to 35 mph combined with low relative humidity creates
elevated fire weather conditions across Sweetwater County by noon.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday and Friday...Scattered afternoon and evening showers and
thunderstorms occur across mainly the north half of the state.
Saturday and Sunday...A weather system moves across the region and
provides the chance for widespread precipitation.
Memorial Day and Tuesday...Scattered afternoon and evening showers
and thunderstorms linger in the wake of the weekend weather system.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
Hazardous Weather Outlook
National Weather Service Cheyenne WY
1210 AM MDT Thu May 22 2025
NEZ002-003-019>021-054-055-095-096-WYZ101>119-230630-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
1210 AM MDT Thu May 22 2025
This hazardous weather outlook is for portions of panhandle
Nebraska...east central Wyoming...south central Wyoming and
southeast Wyoming.
.DAY ONE...TODAY AND TONIGHT
Although quiet weather is expected most of the day. Late evening
and overnight thunderstorms may develop, mainly along and east of
the Interstate 25 corridor. A few of these thunderstorms may
become strong with gusty winds and small hail.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH TUESDAY
Unsettled weather pattern expected this weekend through next week
with daily chances for showers and thunderstorms. Strong to severe
thunderstorms are possible Friday and Saturday.
.Spotter information statement...
Spotter activation is unlikely at this time.
$$
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1102 AM MDT Wed May 21 2025
COZ030>051-221715-
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-
1102 AM MDT Wed May 21 2025
This hazardous weather outlook is for northeast and north central
Colorado.
.DAY ONE...This Afternoon and Tonight
Warm and breezy conditions are forecast today, with highs in the
mid 70s. A few gusts of 40 to 45 mph will be possible across the
higher mountains and along the Wyoming border.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Generally drier and warmer weather will prevail through the rest
of the week, with mainly isolated coverage of afternoon showers
and thunderstorms. However, a couple stronger storms will be
possible over the eastern plains by Friday. Storm coverage and
intensity could see a pickup by this weekend, with the threat of
a few severe storms increasing.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today or tonight.
$$
Hazardous Weather Outlook
National Weather Service Grand Junction CO
333 AM MDT Wed May 21 2025
COZ001>014-017>023-UTZ022>025-027>029-220945-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-Upper Gunnison River Valley-
Uncompahgre Plateau and Dallas Divide-Northwest San Juan Mountains-
Southwest San Juan Mountains-Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
333 AM MDT Wed May 21 2025
This Hazardous Weather Outlook is for northwest Colorado, southwest
Colorado, west central Colorado, east central Utah, northeast Utah
and southeast Utah.
.DAY ONE...Today and tonight.
Warm and windy conditions develop today. Mostly sunny skies will push
temperatures up nearly 10 degrees today.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Hot, dry, and windy conditions develop Thursday and through the
weekend. Critical fire weather conditions are likely across the CWA
beginning Thursday. Scattered showers and thunderstorms are possible
later Saturday and into next week. Locations and coverage remain a
low confidence forecast.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
Issued by National Weather Service North Platte NE
251 AM MDT Wed May 21 2025
SDZ001-002-012>014-024>032-041>044-046-047-049-072>078-WYZ054>060-
220900-
Harding-Northern Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foothills-Rapid City-
Southern Foothills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Haakon-Western Fall River-
Northern Oglala Lakota-Northern Jackson-Bennett-Mellette-Todd-
Tripp-Sturgis/Piedmont Foothills-Southern Meade Co Plains-
Hermosa Foothills-Eastern Fall River-Southern Oglala Lakota-
Southern Jackson-Southern Perkins-Northern Campbell-
Southern Campbell-Western Crook-Wyoming Black Hills-
Weston County Plains-Newcastle-Northeastern Crook-
251 AM MDT Wed May 21 2025 /351 AM CDT Wed May 21 2025/
This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.
.DAY ONE...Today and Tonight
Scattered showers with an isolated thunderstorm are possible this
afternoon, generally south of a line from Spearfish to Mission.
No severe thunderstorms are expected.
Temperatures will cool into the lower to middle 30s across the
area tonight and frost formation is possible across the area. At
this time, the greatest threat for areas of frost is over Harding
and Perkins counties.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
There will be periodic chances for thunderstorms Thursday night
through Monday. At this time, the threat for severe storms is
low.
.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
$$
