Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
257 AM MDT Fri Jul 18 2025
WYZ001>020-022>030-191300-
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-
257 AM MDT Fri Jul 18 2025
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Thunderstorms are expected this afternoon and evening with a few
being strong to severe east of the Divide, especially across the
Bighorn Basin and Johnson County. The primary hazards will be gusty
winds up to 60 mph and isolated small hail.
Dry thunderstorms, capable of 50 mph gusty outflows, are possible
across the Wind Corridor and central Wyoming early this afternoon.
A few hours of elevated to critical fire weather conditions are
possible across eastern Sweetwater County early this afternoon.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Isolated to scattered afternoon and evening shower and thunderstorm
chances each day.
Elevated to critical fire weather conditions Sunday through Thursday.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
Hazardous Weather Outlook
National Weather Service Cheyenne WY
241 PM MDT Fri Jul 18 2025
NEZ002-003-019>021-054-055-095-096-WYZ101>119-192045-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
241 PM MDT Fri Jul 18 2025
This hazardous weather outlook is for portions of panhandle
Nebraska...east central Wyoming...south central Wyoming and
southeast Wyoming.
.DAY ONE...THIS AFTERNOON AND TONIGHT
Scattered thunderstorms will move eastward in the Wyoming high
plains as well as the Nebraska panhandle. Isolated pea to penny
sized hail and gusty winds to near 60 mph are the primary threats
through 8pm. Please report any severe weather to the NWS.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
A better chance of thunderstorms will exist on Saturday with
storms moving eastward in the Wyoming high plains as well as the
Nebraska panhandle. Hail up to quarter size and gusty winds to
near 60 mph are the primary threats through 9pm, mainly in the
Nebraska panhandle.
.Spotter information statement...
Please report any severe weather to the NWS.
$$
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
822 AM MDT Fri Jul 18 2025
COZ030>051-191430-
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-
822 AM MDT Fri Jul 18 2025
This hazardous weather outlook is for northeast and north central
Colorado.
.DAY ONE...Today and Tonight
Scattered showers and thunderstorms are expected to develop over
the higher elevations this afternoon and spread east across the
plains. With increasing instability/shear values expected over
portions of the northeastern corner, there is an isolated threat
that developing storms may produce some large hail and severe wind
gusts across the area if the modest CIN can be overcome.
Instability will be lacking over the higher terrain and urban
corridor today, but DCAPE values are expected to reach upwards of
1500 J/kg this afternoon, which would be conducive to stronger
downdraft potential and a few stronger to severe wind gusts
developing. With fairly weak winds aloft and PWATs slightly above
normal, we could see a few slower moving storms produce brief
heavy rainfall, generally over the mountains and foothills where
moisture is greatest.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
Afternoon and evening showers and thunderstorms are expected each
day through the weekend, with the best chance being on Saturday.
For early next week, very warm and drier weather is expected.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed today or tonight.
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
440 AM MDT Fri Jul 18 2025
SDZ001-002-012>014-024-025-031-032-042-043-046-072-073-077-078-
WYZ056-057-060-191300-
Harding-Northern Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foothills-Pennington Co Plains-
Haakon-Northern Oglala Lakota-Northern Jackson-Mellette-
Sturgis/Piedmont Foothills-Southern Meade Co Plains-
Southern Jackson-Southern Perkins-Western Crook-
Wyoming Black Hills-Northeastern Crook-
440 AM MDT Fri Jul 18 2025 /540 AM CDT Fri Jul 18 2025/
This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.
.DAY ONE...Today and Tonight
There is a marginal risk (level 1 of 5) of severe thunderstorms
from about 400 PM to 1000 PM today, meaning that isolated severe
storms are possible. Primary hazards include large hail and
damaging winds.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
There is a marginal risk (level 1 of 5) of severe thunderstorms
Saturday afternoon and evening with the main hazard of large hail
and damaging winds.
There is a marginal risk (level 1 of 5) of severe thunderstorms
Sunday afternoon and evening over northwest into south-central
South Dakota. The main hazards will be large hail and damaging
winds.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed today.
&&
Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
440 AM MDT Fri Jul 18 2025
SDZ026>030-041-044-047-049-074>076-WYZ054-055-058-059-191300-
Rapid City-Southern Foothills-Central Black Hills-
Southern Black Hills-Custer Co Plains-Western Fall River-Bennett-
Todd-Tripp-Hermosa Foothills-Eastern Fall River-
Southern Oglala Lakota-Northern Campbell-Southern Campbell-
Weston County Plains-Newcastle-
440 AM MDT Fri Jul 18 2025 /540 AM CDT Fri Jul 18 2025/
This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.
.DAY ONE...Today and Tonight
Isolated to scattered thunderstorms will develop tonight and while
organized severe thunderstorms are not expected, a few strong
storms with hail and gusty winds will occur.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
There is a marginal risk (level 1 of 5) of severe thunderstorms
Saturday afternoon and evening with the main hazard of large hail
and damaging winds.
There is a marginal risk (level 1 of 5) of severe thunderstorms
Sunday afternoon and evening over northwest into south-central
South Dakota. The main hazards will be large hail and damaging
winds.
.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
428 AM MDT Fri Jul 18 2025
COZ001>014-017>023-UTZ022>025-027>029-191030-
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-
428 AM MDT Fri Jul 18 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.
Scattered to widespread showers and thunderstorms will develop
across the southern and central mountains with coverage more
scattered on the higher terrain to the north and west this afternoon
and evening. A few of these storms may become severe producing large
hail, damaging winds and localized heavy rain with flash flooding
possible in flood prone areas, such as fire scars and slot canyons.
Wildfire smoke remains visible across much of the CWA.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
The moisture starts drying out Saturday with more scattered showers
and thunderstorms on terrain. Dry air returns Sunday into early next
week with a return of near critical fire weather conditions. There
will be enough residual moisture to produce afternoon thunderstorms
with increased probability for dry lightning. Wildfire smoke will
remain visible for much of eastern Utah and western Colorado.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed. Spotters are encouraged to report
excessive wind or observed wind related damage, and to relay rainfall
amounts or any observed flooding to the National Weather Service in
Grand Junction.
$$
