Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
210 AM MDT Sun Aug 17 2025
IDZ410-411-413-422-427-475-476-180300-
/O.CON.KPIH.FW.W.0019.250817T1800Z-250818T0300Z/
Upper Snake River Valley/Idaho Falls BLM-
Centennial Mountains and Snake River Range/Targhee NF-
Caribou Range/Caribou NF-Sawtooth Range/Northern Sawtooth NF-
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
East Salmon River Mountains/Salmon NF-
Lemhi and Lost River Range/Challis NF-
210 AM MDT Sun Aug 17 2025
...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT
THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES
410, 411, 413, 422, 427, 475, AND 476...
* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River
Valley/Idaho Falls BLM, Fire Weather Zone 411 Centennial
Mountains and Snake River Range/Targhee NF, Fire Weather Zone
413 Caribou Range/Caribou NF, Fire Weather Zone 422 Sawtooth
Range/Northern Sawtooth NF, Fire Weather Zone 427 Goose Creek
and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM
south of the Snake River, Fire Weather Zone 475 East Salmon
River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and
Lost River Range/Challis NF.
* THUNDERSTORMS...25 to 45 percent coverage.
* OUTFLOW WINDS...A dry low-level environment will promote
stronger storms capable of producing wind gusts up to 45 to 55
mph.
* IMPACTS...Critical fire weather conditions are expected Sunday
afternoon and evening. Lightning may generate new fire starts.
Any new fire starts or existing fires may spread rapidly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:
- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.
- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.
- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.
&&
$$
Flood Advisory
Flood Advisory
National Weather Service Great Falls MT
219 PM MDT Sun Aug 17 2025
MTC007-049-172300-
/O.NEW.KTFX.FA.Y.0038.250817T2019Z-250817T2300Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Broadwater MT-Lewis and Clark MT-
219 PM MDT Sun Aug 17 2025
...FLOOD ADVISORY IN EFFECT UNTIL 5 PM MDT THIS AFTERNOON...
* WHAT...Hydrologic flooding in the Horse Gulch burn area caused by
excessive rainfall is expected.
* WHERE...Portions of southwest and west central Montana, including
the following counties, in southwest Montana, Broadwater. In west
central Montana, Lewis and Clark.
* WHEN...Until 500 PM MDT.
* IMPACTS...Water over roadways and minor flooding in Riverside
Campground is possible.
* ADDITIONAL DETAILS...
- At 214 PM MDT, Doppler radar and automated rain gauges
indicated heavy rain due to thunderstorms. Minor flooding is
ongoing or expected to begin shortly in the advisory area.
- Additional rainfall amounts of 0.2 to 0.4 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Horse Gulch Burn scar area.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4669 11179 4669 11159 4658 11157 4657 11178
$$
Brusda
Special Weather Statement
Special Weather Statement
National Weather Service Great Falls MT
309 PM MDT Sun Aug 17 2025
MTZ317-321-172200-
Little Belt and Highwood Mountains MT-Meagher County Valleys MT-
309 PM MDT Sun Aug 17 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL MEAGHER COUNTY
THROUGH 400 PM MDT...
At 309 PM MDT, Doppler radar was tracking a strong thunderstorm 17
miles northwest of White Sulphur Springs, moving northeast at 20 mph.
HAZARD...Wind gusts of 50 to 55 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...
Fort Logan On The Smith River.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4668 11116 4681 11131 4699 11096 4677 11065
TIME...MOT...LOC 2109Z 227DEG 18KT 4675 11113
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH
$$
AM
Special Weather Statement
National Weather Service Rapid City SD
256 PM MDT Sun Aug 17 2025
SDZ024-028-072-172130-
Northern Black Hills SD-Central Black Hills SD-
Sturgis/Piedmont Foothills SD-
256 PM MDT Sun Aug 17 2025
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN MEADE...
SOUTHEASTERN LAWRENCE AND CENTRAL PENNINGTON COUNTIES THROUGH 330 PM
MDT...
At 256 PM MDT, Doppler radar was tracking a strong thunderstorm near
Nemo, or 13 miles northwest of Rapid City, moving northeast at 10
mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Nemo, Dalton Lake, and Pactola Reservoir.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4420 10362 4429 10348 4414 10337 4411 10337
4408 10355
TIME...MOT...LOC 2056Z 242DEG 8KT 4416 10349
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
Woodward
Special Weather Statement
National Weather Service Billings MT
246 PM MDT Sun Aug 17 2025
MTZ034-056-066-141-172130-
Northern Stillwater MT-Beartooth Foothills MT-Red Lodge Foothills
MT-Northern Sweet Grass MT-
246 PM MDT Sun Aug 17 2025
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL SWEET GRASS...
NORTHWESTERN CARBON AND CENTRAL STILLWATER COUNTIES UNTIL 330 PM
MDT...
At 246 PM MDT, Doppler radar was tracking a strong thunderstorm 23
miles south of Big Timber, moving east at 20 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is possible.
Locations impacted include...
Absarokee, Reed Point, Fishtail and Nye.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.
Torrential rainfall is also occurring with this storm and may lead
to flash flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4540 10987 4547 10988 4547 10987 4548 10986
4547 10985 4548 10981 4549 10980 4551 10981
4551 10984 4553 10982 4555 10985 4556 10983
4559 10986 4561 10987 4561 10988 4559 10989
4567 10990 4577 10941 4544 10931
TIME...MOT...LOC 2046Z 253DEG 17KT 4552 10981
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
Matos
Special Weather Statement
National Weather Service Riverton WY
1235 PM MDT Sun Aug 17 2025
WYZ001-003>006-010-011-013-016>020-022-023-025>030-180200-
Yellowstone National Park-Cody Foothills-North Bighorn Basin-
Southwest Bighorn Basin-Southeast Bighorn Basin-
Northeast Johnson County-Southeast Johnson County-Jackson Hole-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Upper Green River Basin Foothills-Upper Green River Basin-
South Lincoln County-Rock Springs and Green River-Flaming Gorge-
East Sweetwater County-
Including the cities of Lake, Mammoth, Old Faithful, Clark, Cody,
Meeteetse, Basin, Greybull, Lovell, Powell, Shell, Thermopolis,
Ten Sleep, Worland, Buffalo, Kaycee, Jackson, Dubois, Riverton,
Shoshoni, Lander, Jeffrey City, Casper, Afton, Alpine,
Star Valley Ranch, Thayne, Pinedale, La Barge, Big Piney, Farson,
Kemmerer, Cokeville, Rock Springs, Green River, and Wamsutter
1235 PM MDT Sun Aug 17 2025
...Gusty Outflow Winds 40 to 50 mph through 8 PM Sunday...
This is a special weather statement from the National Weather
Service Office in Riverton.
* WHAT...Outflow wind gusts 40 to 50 mph with isolated gusts of
55 mph or more possible.
* WHERE...Lower elevations across Johnson, Natrona, Fremont,
Sweetwater, Sublette, and Lincoln Counties as well as the
Bighorn Basin, Yellowstone National Park, and Jackson Hole.
* WHEN...Through 8 PM Sunday.
* ADDITIONAL DETAILS...Scattered high-based showers and
thunderstorms will continue to develop and spread across much of
Wyoming Sunday afternoon and evening. Any of these showers and
storms will be capable of producing widespread outflow wind
gusts of 40 to 50 mph with isolated gusts of 55 mph or more
possible. Thunderstorms will also likely be producing frequent
lightning strikes. Some locations may see small hail, especially
in areas that saw prolonged periods of sunshine this morning
where instability is the greatest.
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Bismarck ND
307 PM CDT Sun Aug 17 2025
NDZ001>005-009>013-017>019-021>023-025-031-032-040-043-182015-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-Ward-
McHenry-Pierce-McKenzie-Dunn-Mercer-McLean-Sheridan-Wells-Foster-
Golden Valley-Billings-Slope-Bowman-
307 PM CDT Sun Aug 17 2025 /207 PM MDT Sun Aug 17 2025/
This Hazardous Weather Outlook is for portions of north central
North Dakota, northwest North Dakota, south central North Dakota,
southeast North Dakota, and southwest North Dakota.
.DAY ONE...This Afternoon and Tonight
An isolated thunderstorm is possible through tonight. The
chance of severe weather is low.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Bismarck ND
307 PM CDT Sun Aug 17 2025
NDZ020-033>037-041-042-044>047-050-182015-
Oliver-Stark-Morton-Burleigh-Kidder-Stutsman-Hettinger-Grant-
Adams-Sioux-Emmons-Logan-McIntosh-
307 PM CDT Sun Aug 17 2025 /207 PM MDT Sun Aug 17 2025/
This Hazardous Weather Outlook is for portions of south central
North Dakota, southeast North Dakota, and southwest North Dakota.
.DAY ONE...This Afternoon and Tonight
An isolated thunderstorm is possible through tonight. The
chance of severe weather is low.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
An isolated severe thunderstorm is possible on Monday afternoon
and evening. Main hazard will be hail to the size of a ping pong
ball and wind gusts to 60 mph.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Aberdeen SD
828 AM CDT Sun Aug 17 2025
SDZ003>005-009-010-015>017-033>035-181330-
Corson-Campbell-McPherson-Walworth-Edmunds-Dewey-Potter-Faulk-
Stanley-Sully-Hughes-
828 AM CDT Sun Aug 17 2025 /728 AM MDT Sun Aug 17 2025/
This Hazardous Weather Outlook is for central South Dakota and
north central South Dakota.
.DAY ONE...Today and tonight.
While thunderstorms are possible today, severe weather is not
expected at this time.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
A marginal risk, or level 1 out of 5, is in place for severe storms
today and this evening. Main threats will be damaging winds to
around 60 mph and large hail to around 1 inch in diameter. Locally
heavy rainfall is possible.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
KF
Hazardous Weather Outlook
National Weather Service Aberdeen SD
828 AM CDT Sun Aug 17 2025
SDZ036-037-045-048-051-181330-
Hyde-Hand-Jones-Lyman-Buffalo-
828 AM CDT Sun Aug 17 2025
This Hazardous Weather Outlook is for central South Dakota.
.DAY ONE...Today and tonight.
A marginal risk, or level 1 out of 5, is in place for severe storms
today and this evening. Main threats will be damaging winds to
around 60 mph and large hail to around 1 inch in diameter. Locally
heavy rainfall is possible as well as an isolated tornado or two.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
A marginal risk, or level 1 out of 5, is in place for severe storms
Monday. Main threats will be damaging winds to around 60 mph and
large hail to around 1 inch in diameter. Locally heavy rainfall is
possible.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.
$$
Hazardous Weather Outlook
National Weather Service Rapid City SD
321 AM MDT Sun Aug 17 2025
SDZ001-002-012>014-024>026-028-031-032-043-072-073-078-WYZ054>060-
181300-
Harding-Northern Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foothills-Rapid City-
Central Black Hills-Pennington Co Plains-Haakon-Northern Jackson-
Sturgis/Piedmont Foothills-Southern Meade Co Plains-
Southern Perkins-Northern Campbell-Southern Campbell-
Western Crook-Wyoming Black Hills-Weston County Plains-Newcastle-
Northeastern Crook-
321 AM MDT Sun Aug 17 2025
This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.
.DAY ONE...Today and Tonight
Isolated thunderstorms are possible today, no widespread severe
weather is expected.
.DAYS TWO THROUGH SEVEN...Monday through Saturday
Thunderstorms are possible on Monday, some storms could be strong
to severe and capable of damaging winds and large hail.
.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
$$
Hazardous Weather Outlook
National Weather Service Riverton WY
200 AM MDT Sun Aug 17 2025
WYZ001>020-022>030-181200-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
200 AM MDT Sun Aug 17 2025
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and Tonight.
Afternoon and evening thunderstorm chances once again with frequent
lightning and gusty outflow winds the main hazard. Storms diminish
after sunset towards midnight.
.DAYS TWO THROUGH SEVEN...Monday through Saturday.
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
