Freeze Warning
URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1045 AM MDT Mon Sep 15 2025
WYZ013-023-161300-
/O.NEW.KRIW.FZ.W.0003.250916T0700Z-250916T1300Z/
Jackson Hole-Star Valley-
Including the cities of Jackson, Afton, Star Valley Ranch,
Alpine, and Thayne
1045 AM MDT Mon Sep 15 2025
...FREEZE WARNING IN EFFECT FROM 1 AM TO 7 AM MDT TUESDAY...
* WHAT...Sub-freezing temperatures of 30 to 33 expected, with
isolated areas as low as 28.
* WHERE...Jackson Hole and Star Valley.
* WHEN...From 1 AM to 7 AM MDT Tuesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation, and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...There is an 80 percent chance of widespread
temperatures of 32 or less occurring. Cloud cover could keep low
temperatures warmer than is currently expected.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1045 AM MDT Mon Sep 15 2025
WYZ025-161300-
/O.NEW.KRIW.FZ.W.0003.250916T0700Z-250916T1300Z/
Upper Green River Basin Foothills-
Including the cities of Pinedale
1045 AM MDT Mon Sep 15 2025
...FREEZE WARNING IN EFFECT FROM 1 AM TO 7 AM MDT TUESDAY...
* WHAT...Sub-freezing temperatures 28 to 32 expected around
Pinedale, 26 to 30 around Daniel, and as low as 23 around
Bondurant.
* WHERE...Upper Green River Basin Foothills.
* WHEN...From 1 AM to 7 AM MDT Tuesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation, and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...There is a 90 to 100 percent chance of
widespread temperatures of 32 or less occurring. Cloud cover could
keep low temperatures warmer than is currently expected.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1045 AM MDT Mon Sep 15 2025
WYZ026-161300-
/O.NEW.KRIW.FZ.W.0003.250916T0700Z-250916T1300Z/
Upper Green River Basin-
Including the cities of Farson, Big Piney, and La Barge
1045 AM MDT Mon Sep 15 2025
...FREEZE WARNING IN EFFECT FROM 1 AM TO 7 AM MDT TUESDAY...
* WHAT...Sub-freezing temperatures as low as 28 expected across the
northern half of the basin, including Big Piney. Isolated colder
temperatures possible along the Green River. Warmer lows 38 to 40
degrees expected for the far southern basin, including Farson.
* WHERE...Upper Green River Basin.
* WHEN...From 1 AM to 7 AM MDT Tuesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation, and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...There is an 85 percent chance of widespread
temperatures of 32 or less occurring across the northern basin.
Cloud cover could keep low temperatures warmer than is currently
expected.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
Wittmann
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Billings MT
210 PM MDT Mon Sep 15 2025
MTZ067-162015-
/O.NEW.KBYZ.WW.Y.0033.250916T0000Z-250917T0600Z/
Absaroka/Beartooth Mountains-
210 PM MDT Mon Sep 15 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
MIDNIGHT MDT TUESDAY NIGHT FOR THE BEARTOOTH HIGHWAY...
* WHAT...1 to 3 inches of snow expected for the Beartooth Highway
above 10,000 ft.
* WHERE...Absaroka/Beartooth Mountains.
* WHEN...From 6 PM this evening to midnight MDT Tuesday Night.
* IMPACTS...Travel may be impacted on the highest points of the
Beartooth Highway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. For the latest road
conditions, call 5 1 1.
Be prepared for slippery roads. Slow down and use caution while
driving.
&&
$$
Additional graphics for this hazard can be found at
http://www.weather.gov/billings
Torgerson
Special Weather Statement
Special Weather Statement
National Weather Service Cheyenne WY
711 PM MDT Mon Sep 15 2025
WYZ104-109-111>113-160145-
Sierra Madre Range WY-Upper North Platte River Basin WY-
Central Carbon County WY-Ferris/Seminoe/Shirley Mountains WY-
Southwest Carbon County WY-
711 PM MDT Mon Sep 15 2025
...STRONG THUNDERSTORMS WILL IMPACT CENTRAL CARBON COUNTY THROUGH 745
PM MDT...
At 710 PM MDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from 10 miles south of Lamont to
6 miles northeast of Jack Creek Campground. Movement was northeast at
40 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Rawlins, Saratoga, Sinclair, Fort Steele Historic Site, Saratoga Lake
Campground, Rawlins Municipal Airport, Rim Lake, Teton Reservoir,
Shively Field, Dugway Campground, Saratoga Lake, Separation Lake, and
Carbon County Fairgrounds.
This includes Interstate 80 in Wyoming between mile markers 200 and
235.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4128 10748 4174 10751 4208 10751 4209 10753
4211 10753 4227 10711 4146 10666
TIME...MOT...LOC 0110Z 240DEG 36KT 4207 10745 4134 10703
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
$$
Fuller
Special Weather Statement
National Weather Service Billings MT
703 PM MDT Mon Sep 15 2025
MTZ036-037-160200-
Carter MT-Powder River MT-
703 PM MDT Mon Sep 15 2025
...A LINE OF THUNDERSTORMS PRODUCING GUSTY WINDS WILL IMPACT
SOUTHERN CARTER AND SOUTHEASTERN POWDER RIVER COUNTIES UNTIL 8 PM
MDT...
At 703 PM MDT, Doppler radar was tracking a line of thunderstorms
extending from 7 miles north of Biddle to 11 miles southeast of
Alzada, moving northeast at 25 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Observed.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Broadus, Alzada, Biddle, Hammond, Boyes, Ridge, Belle Creek and
Albion.
A weather station along Highway 59 south of Biddle reported a 45 mph
wind gust at 6:45 PM MDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4500 10551 4556 10545 4547 10459 4532 10404
4500 10404
TIME...MOT...LOC 0058Z 203DEG 21KT 4520 10538 4510 10483 4488 10430
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
$$
Arends
Special Weather Statement
National Weather Service Rapid City SD
702 PM MDT Mon Sep 15 2025
WYZ056-160115-
Western Crook WY-
702 PM MDT Mon Sep 15 2025
...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN CROOK COUNTY THROUGH
715 PM MDT...
At 701 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles east of Lightning Flat to 12 miles
north of Hulett. Movement was northeast at 25 mph.
HAZARD...Wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Lightning Flat.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4500 10503 4500 10464 4499 10437 4496 10438
4478 10462 4495 10508
TIME...MOT...LOC 0101Z 224DEG 22KT 4497 10491 4486 10462
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
$$
GM
Special Weather Statement
National Weather Service Riverton WY
657 PM MDT Mon Sep 15 2025
WYZ006-160130-
Southeast Bighorn Basin-
657 PM MDT Mon Sep 15 2025
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL WASHAKIE COUNTY THROUGH
730 PM MDT...
At 656 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles south of Worland Municipal Airport, which is 14 miles south of
Worland, moving northeast at 40 mph.
HAZARD...Wind gusts up to 40 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
This storm will remain over mainly rural areas of central Washakie
County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4374 10789 4383 10797 4402 10764 4383 10743
TIME...MOT...LOC 0056Z 244DEG 33KT 4381 10787
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH
$$
Gerhardt
Special Weather Statement
National Weather Service Rapid City SD
645 PM MDT Mon Sep 15 2025
SDZ012-024-025-072-073-WYZ056-057-060-160130-
Northern Black Hills SD-Butte SD-Northern Foothills SD-
Southern Meade Co Plains SD-Sturgis/Piedmont Foothills SD-
Wyoming Black Hills WY-Western Crook WY-Northeastern Crook WY-
645 PM MDT Mon Sep 15 2025
...STRONG THUNDERSTORMS WILL IMPACT WESTERN BUTTE...SOUTHWESTERN
MEADE...LAWRENCE...WEST CENTRAL PENNINGTON AND EASTERN CROOK COUNTIES
THROUGH 730 PM MDT...
At 645 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 5 miles west of Colony to 4 miles northeast of
Medicine Mountain. Movement was northeast at 35 mph.
HAZARD...Wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Spearfish, Sturgis, Belle Fourche, Lead, Deadwood, Whitewood,
Nisland, Saint Onge, Central City, Colony, Beulah, Fruitdale, Alva,
Aladdin, Brownsville, Galena, Tilford, Cheyenne Crossing, Iron Creek
Lake, and Bear Butte State Park.
This includes...
Interstate 90 in South Dakota between Mile Markers 1 and 44.
Interstate 90 in Wyoming between Mile Markers 193 and 207.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4429 10322 4408 10402 4487 10461 4500 10434
4499 10406 4501 10404 4515 10404 4520 10394
TIME...MOT...LOC 0045Z 215DEG 32KT 4485 10427 4396 10367
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
$$
GM
Special Weather Statement
National Weather Service Rapid City SD
630 PM MDT Mon Sep 15 2025
SDZ001-160115-
Harding SD-
630 PM MDT Mon Sep 15 2025
...STRONG THUNDERSTORMS WILL IMPACT NORTH CENTRAL HARDING COUNTY
THROUGH 715 PM MDT...
At 629 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 4 miles north of Table Mountain to 3 miles
south of North Cave Hills. Movement was northeast at 20 mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Ludlow, North Cave Hills, Table Mountain, and South Cave Hills.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4594 10313 4584 10313 4570 10359 4594 10381
4595 10379
TIME...MOT...LOC 0029Z 247DEG 17KT 4596 10367 4579 10347
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
$$
GM
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Cheyenne WY
439 AM MDT Mon Sep 15 2025
NEZ002-003-019>021-054-055-095-096-WYZ101>119-161045-
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-
439 AM MDT Mon Sep 15 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
Warmer temperatures are expected today with isolated thunderstorms
possible late in the afternoon and evening hours. Gusty winds are
expected to accompany any showers and storms.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
Another Pacific system will impact the region Tuesday through
Thursday, bringing much cooler temperatures and widespread showers
and thunderstorms. Rain will change to snow above elevations of
9500 feet in central and southeast Wyoming.
.Spotter information statement...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Riverton WY
344 AM MDT Mon Sep 15 2025
WYZ001>020-022>030-161345-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
344 AM MDT Mon Sep 15 2025
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Showers and thunderstorms will spread across western and central
Wyoming today. Some storms could produce gusty winds and small hail
this afternoon.
Cooler temperatures will move into western Wyoming overnight, with a
few areas approaching freezing.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Showers and thunderstorms will continue into the day Tuesday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
325 AM MDT Mon Sep 15 2025
SDZ001-002-012-013-024>031-041-042-072>076-078-WYZ054>060-161300-
Harding-Northern Perkins-Butte-Northern Meade Co Plains-
Northern Black Hills-Northern Foothills-Rapid City-
Southern Foothills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Western Fall River-
Northern Oglala Lakota-Sturgis/Piedmont Foothills-
Southern Meade Co Plains-Hermosa Foothills-Eastern Fall River-
Southern Oglala Lakota-Southern Perkins-Northern Campbell-
Southern Campbell-Western Crook-Wyoming Black Hills-
Weston County Plains-Newcastle-Northeastern Crook-
325 AM MDT Mon Sep 15 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
today, meaning that isolated severe storms are possible. The
primary hazard will be strong gusty winds.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday
Scattered to isolated thunderstorms are possible through
Thursday. Severe weather is not expected.
.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
$$
