Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Hydrologic Outlook
Area(s): Big Horn, MT; Carbon, MT; Golden Valley, MT; Park, MT; Stillwater, MT; Sweet Grass, MT; Wheatland, MT; Yellowstone, MT; Sheridan, WY
Effective: 2026-05-13 @ 10:34 am -> 2026-05-14 @ 4:00 pm
Onset: 2026-05-13 @ 10:34 am
Severity: Unknown
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-05-13 @ 10:34 am
Headline: Hydrologic Outlook issued May 13 at 9:34AM MDT by NWS Billings MT
Description: ESFBYZ

Recent very warm temperatures has enhanced snowmelt in the mountains
this week, resulting in significantly higher flows on area waterways.
Flooding is not expected at this time due to marginal remaining
snowpack in the middle elevations between 6000 and 8000 feet. Rivers
that have seen increased flows include the Yellowstone, Shields,
Boulder, Stillwater, and Clarks Fork. Some smaller streams flowing
out of the mountains have also experienced rises.

Looking ahead, cooler temperatures are in store for the end of the
week. In fact, a seasonably cold weather system may bring freezing
temperatures at high elevations and potential snowfall this weekend
into early next week. The colder weather will slow or briefly halt
the high elevation snow melt.

Those with interests along foothills waterways should be prepared for
higher water levels, and move property and livestock away from
rivers, streams, and low lying areas.

Runoff may fill culverts, ditches, and storm drains causing water to
flow over foothills roadways potentially causing damage. Do not drive
over flooded roadways, Turn Around Don't Drown.

Recreationists in the mountains and foothills should be prepared for
changing conditions and use extra caution when near waterways. Flows
will be faster, and the water is very cold.

Stay tuned to the forecast. Please report any flooding to local law
enforcement and have them relay the report to the National Weather
Service.

Alert: High Wind Warning
Area(s): Crazy Mountains
Effective: 2026-05-13 @ 9:52 am -> 2026-05-14 @ 10:00 am
Onset: 2026-05-14 @ 1:00 am -> 2026-05-14 @ 7:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-05-13 @ 9:52 am
Headline: High Wind Warning issued May 13 at 8:52AM MDT until May 14 at 6:00PM MDT by NWS Billings MT
Description: * WHAT...West winds gusting up to 75 mph expected.

* WHERE...Crazy Mountains.

* WHEN...From midnight tonight to 6 PM MDT Thursday.

* IMPACTS...Recreation in the high country will be impacted by strong
winds.

Alert: High Wind Warning
Area(s): Judith Gap; Northern Sweet Grass; Melville Foothills; Southern Wheatland
Effective: 2026-05-13 @ 9:52 am -> 2026-05-14 @ 10:00 am
Onset: 2026-05-13 @ 7:00 pm -> 2026-05-14 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-05-13 @ 9:52 am
Headline: High Wind Warning issued May 13 at 8:52AM MDT until May 14 at 9:00PM MDT by NWS Billings MT
Description: * WHAT...West winds gusting 60 to 70 mph possible. Strongest winds
tonight through Thursday morning.

* WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and
Northern Sweet Grass.

* WHEN...From 6 PM this evening to 9 PM MDT Thursday.

* IMPACTS...Strong winds may blow down some trees and power lines.
Local power outages are possible. Strong crosswinds will make
travel difficult along Highway 191 from Big Timber through Judith
Gap. Warm and dry conditions with strong winds could cause rapid
fire spread.

* ADDITIONAL DETAILS...Winds this evening will be erratic due to
isolated thunderstorm activity.

Alert: High Wind Warning
Area(s): Musselshell; Northern Stillwater; Golden Valley; Southwestern Yellowstone
Effective: 2026-05-13 @ 9:52 am -> 2026-05-14 @ 10:00 am
Onset: 2026-05-13 @ 7:00 pm -> 2026-05-14 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-05-13 @ 9:52 am
Headline: High Wind Warning issued May 13 at 8:52AM MDT until May 14 at 9:00PM MDT by NWS Billings MT
Description: * WHAT...West winds gusting up to 60 mph expected. Strongest winds
tonight through Thursday morning.

* WHERE...Golden Valley, Musselshell, Northern Stillwater, and
Southwestern Yellowstone.

* WHEN...From 6 PM this evening to 9 PM MDT Thursday.

* IMPACTS...Strong winds may blow down some trees and power lines.
Local power outages are possible. Travel will be difficult for high
profile vehicles. Warm and dry conditions with strong winds could
cause rapid fire spread.

* ADDITIONAL DETAILS...Winds this evening will be erratic due to
isolated thunderstorm activity.

Alert: Wind Advisory
Area(s): Livingston Area; Beartooth Foothills
Effective: 2026-05-13 @ 9:52 am -> 2026-05-14 @ 10:00 am
Onset: 2026-05-13 @ 7:00 pm -> 2026-05-14 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-05-13 @ 9:52 am
Headline: Wind Advisory issued May 13 at 8:52AM MDT until May 14 at 9:00PM MDT by NWS Billings MT
Description: * WHAT...West winds 30 to 40 mph with gusts up to 60 mph expected.
Strongest winds this evening through Thursday morning.

* WHERE...Beartooth Foothills and Livingston Area.

* WHEN...From 6 PM this evening to 9 PM MDT Thursday.

* IMPACTS...Strong winds may blow down some trees and power lines.
Local power outages are possible. Gusty crosswinds will make travel
difficult along Interstate 90 from Livingston to Big Timber and
roads along the Beartooth Foothills. Warm, dry and windy conditions
could cause rapid fire spread.

* ADDITIONAL DETAILS...Winds this evening will be erratic due to
isolated thunderstorm activity.

Alert: High Wind Warning
Area(s): Paradise Valley
Effective: 2026-05-13 @ 9:52 am -> 2026-05-13 @ 11:00 pm
Onset: 2026-05-13 @ 2:00 pm -> 2026-05-13 @ 11:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-05-13 @ 9:52 am
Headline: High Wind Warning issued May 13 at 8:52AM MDT until May 13 at 10:00PM MDT by NWS Billings MT
Description: * WHAT...Southwest winds gusting frequently between 50 and 60 mph
expected.

* WHERE...Paradise Valley.

* WHEN...From 1 PM this afternoon to 10 PM MDT this evening.

* IMPACTS...Travel will be difficult on US-89 through the Paradise
Valley, especially for high profile vehicles. Local power outages
are possible. Warm and dry conditions with strong winds could cause
rapid fire spread.

* ADDITIONAL DETAILS...Winds this afternoon and evening will be
erratic at times, due to isolated thunderstorm activity.

Alert: Red Flag Warning
Area(s): Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest
Effective: 2026-05-13 @ 4:18 am -> 2026-05-13 @ 12:30 pm
Onset: 2026-05-13 @ 1:00 pm -> 2026-05-13 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-05-13 @ 4:18 am
Headline: Red Flag Warning issued May 13 at 3:18AM MDT until May 13 at 9:00PM MDT by NWS Missoula MT
Description: ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT
THIS EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST
BEAVERHEAD AND EAST BEAVERHEAD...

* AFFECTED AREA...Fire Weather Zones 110 and 111.

* TIMING...From noon today to 9 PM MDT this evening.

* WINDS...Southwest winds 25 to 35 mph with gusts up to 55 mph.

* RELATIVE HUMIDITY...Relative Humidity between 14 to 24 percent.

* STORMS...Scattered thunderstorms causing outflow winds up to 70 mph
and dry lightning.

* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.

Alert: Winter Weather Advisory
Area(s): West Glacier Region
Effective: 2026-05-13 @ 4:15 am -> 2026-05-13 @ 12:15 pm
Onset: 2026-05-14 @ 1:00 am -> 2026-05-14 @ 4:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-05-13 @ 4:15 am
Headline: Winter Weather Advisory issued May 13 at 3:15AM MDT until May 14 at 3:00PM MDT by NWS Missoula MT
Description: * WHAT...Wet snow expected above 5000 feet. Total snow accumulations
of 2 to 5 inches. Winds gusting as high as 50 mph.

* WHERE...Glacier National Park

* WHEN...From midnight tonight to 3 PM MDT Thursday.

* IMPACTS...Plan on hazardous conditions in the backcountry. Gusty
winds could bring down tree branches.

Alert: Wind Advisory
Area(s): Kootenai/Cabinet Region; Lower Clark Fork Region
Effective: 2026-05-13 @ 4:12 am -> 2026-05-14 @ 1:00 am
Onset: 2026-05-13 @ 10:00 am -> 2026-05-14 @ 1:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-05-13 @ 4:12 am
Headline: Wind Advisory issued May 13 at 3:12AM MDT until May 14 at 12:00AM MDT by NWS Missoula MT
Description: * WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph
expected. Isolated stronger gusts are possible with showers and
thunderstorms.

* WHERE...Kootenai/Cabinet Region and Lower Clark Fork Region.

* WHEN...From 9 AM this morning to midnight MDT tonight.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

Alert: Wind Advisory
Area(s): Missoula/Bitterroot Valleys; Bitterroot/Sapphire Mountains; Butte/Blackfoot Region; Potomac/Seeley Lake Region
Effective: 2026-05-13 @ 4:12 am -> 2026-05-14 @ 1:00 am
Onset: 2026-05-13 @ 1:00 pm -> 2026-05-14 @ 1:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-05-13 @ 4:12 am
Headline: Wind Advisory issued May 13 at 3:12AM MDT until May 14 at 12:00AM MDT by NWS Missoula MT
Description: * WHAT...Southwest winds 20 to 30 mph with gusts up to 55 mph
expected. Isolated stronger gusts are possible with showers and
thunderstorms.

* WHERE...Bitterroot/Sapphire Mountains, Butte/Blackfoot Region,
Missoula/Bitterroot Valleys, and Potomac/Seeley Lake Region.

* WHEN...From noon today to midnight MDT tonight.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

Alert: Wind Advisory
Area(s): West Glacier Region; Flathead/Mission Valleys
Effective: 2026-05-13 @ 4:12 am -> 2026-05-14 @ 1:00 am
Onset: 2026-05-13 @ 1:00 pm -> 2026-05-14 @ 1:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2026-05-13 @ 4:12 am
Headline: Wind Advisory issued May 13 at 3:12AM MDT until May 14 at 12:00AM MDT by NWS Missoula MT
Description: * WHAT...Southwest winds 20 to 30 mph with gusts up to 50 mph
expected. Isolated stronger gusts are possible with showers and
thunderstorms.

* WHERE...Flathead/Mission Valleys and West Glacier Region.

* WHEN...From noon today to midnight MDT tonight.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

Alert: Red Flag Warning
Area(s): Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; Dawson/McCone/Prairie/Richland/Wibaux Counties; Northern Valley and Northern Phillips Counties; The Little Rockies; The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties
Effective: 2026-05-13 @ 2:58 am -> 2026-05-13 @ 6:00 pm
Onset: 2026-05-13 @ 11:00 am -> 2026-05-13 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-05-13 @ 2:58 am
Headline: Red Flag Warning issued May 13 at 1:58AM MDT until May 13 at 9:00PM MDT by NWS Glasgow MT
Description: * AFFECTED AREA...Fire weather zones 120, 122, 134, 135, 136,
and 137.

* WIND...Southeast at 15 to 30 mph with gusts to 40 mph.

* HUMIDITY...As low as 12 percent.

* THUNDERSTORMS...Moderate confidence of isolated to scattered
late-day thunderstorms.

* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.

Alert: Red Flag Warning
Area(s): Hill and Blaine Counties
Effective: 2026-05-13 @ 1:16 am -> 2026-05-13 @ 4:30 pm
Onset: 2026-05-13 @ 1:00 pm -> 2026-05-13 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 1:16 am
Headline: Red Flag Warning issued May 13 at 12:16AM MDT until May 13 at 9:00PM MDT by NWS Great Falls MT
Description: * AFFECTED AREA...Hill and Blaine Counties.

* TIMING...Noon today through 9 PM MST.

* WINDS...South to southwesterly 20 to 30 mph with gusts up to 50
mph.

* RELATIVE HUMIDITY...As low as 14 percent.

* TEMPERATURES...Up to 92.

* THUNDERSTORMS...Scattered showers and thunderstorms capable of
producing localized wind gusts between 60 and 80 mph will move
in from the southwest during the mid- afternoon to early evening
hours.

* IMPACTS...Any fires that develop will spread rapidly. Outdoor
burning is not recommended.

Alert: Winter Weather Advisory
Area(s): East Glacier Park Region
Effective: 2026-05-13 @ 1:06 am -> 2026-05-13 @ 6:00 pm
Onset: 2026-05-14 @ 1:00 am -> 2026-05-14 @ 1:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 1:06 am
Headline: Winter Weather Advisory issued May 13 at 12:06AM MDT until May 14 at 12:00PM MDT by NWS Great Falls MT
Description: * WHAT...Wet snow expected. Total snow accumulations between 2 and 6
inches at Logan Pass and other areas of Glacier National Park
above 5500 feet. Winds gusting over 60 mph at times.

* WHERE...East Glacier Park Region Zone.

* WHEN...From midnight Wednesday Night to noon MDT Thursday.

* IMPACTS...Plan for dangerous conditions for outdoor recreation and
other activities.

Alert: High Wind Watch
Area(s): Helena Valley
Effective: 2026-05-13 @ 12:48 am -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-14 @ 1:00 am -> 2026-05-14 @ 7:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Great Falls MT on 2026-05-13 @ 12:48 am
Headline: High Wind Watch issued May 12 at 11:48PM MDT until May 14 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Westerly winds 30 to 40 mph with gusts up to 60 mph
possible.

* WHERE...Helena Valley.

* WHEN...From late Wednesday night through Thursday afternoon.

* IMPACTS...High winds may move loose debris, damage property and
cause isolated power outages. Travel could be difficult,
especially for high profile vehicles.

Alert: High Wind Warning
Area(s): East Glacier Park Region; Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Southern Rocky Mountain Front; Southern High Plains; Upper Blackfoot and MacDonald Pass
Effective: 2026-05-13 @ 12:48 am -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-13 @ 7:00 pm -> 2026-05-15 @ 1:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 12:48 am
Headline: High Wind Warning issued May 12 at 11:48PM MDT until May 15 at 12:00AM MDT by NWS Great Falls MT
Description: * WHAT...Westerly winds 40 to 50 mph with gusts up to 90 mph
possible along the Rocky Mountain Front, with gusts up to 75 mph
elsewhere.

* WHERE...The Rocky Mountain Front and adjacent foothills and
plains, Eastern Glacier, Western Toole, and Central Pondera
Counties, and Upper Blackfoot and MacDonald Pass.

* WHEN...From 6 PM Wednesday to midnight MDT Thursday Night.

* IMPACTS...High winds may move loose debris, damage property and
cause power outages. Travel could be difficult to dangerous,
especially for high profile vehicles.

Alert: High Wind Warning
Area(s): Hill County; Northern Blaine County; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft; Snowy and Judith Mountains
Effective: 2026-05-13 @ 12:48 am -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-14 @ 4:00 am -> 2026-05-15 @ 1:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 12:48 am
Headline: High Wind Warning issued May 12 at 11:48PM MDT until May 15 at 12:00AM MDT by NWS Great Falls MT
Description: * WHAT...Westerly winds 30 to 40 mph with gusts up to 70 mph
expected.

* WHERE...Snowy and Judith Mountains, Bears Paw Mountains and
Southern Blaine, Fergus County below 4500ft, Hill County, Northern
Blaine County, and Western and Central Chouteau County.

* WHEN...From 3 AM Thursday to midnight MDT Thursday Night.

* IMPACTS...High winds may move loose debris, damage property and
cause isolated power outages. Travel could be difficult,
especially for high profile vehicles.

Alert: High Wind Warning
Area(s): Eastern Pondera and Eastern Teton
Effective: 2026-05-13 @ 12:48 am -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-14 @ 1:00 am -> 2026-05-14 @ 7:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 12:48 am
Headline: High Wind Warning issued May 12 at 11:48PM MDT until May 14 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Westerly winds 30 to 40 mph with gusts up to 70 mph
expected.

* WHERE...Eastern Pondera and Eastern Teton Counties.

* WHEN...From midnight Wednesday Night to 6 PM MDT Thursday.

* IMPACTS...High winds may move loose debris, damage property and
cause isolated power outages. Travel could be difficult,
especially for high profile vehicles.

Alert: High Wind Warning
Area(s): Eastern Toole and Liberty; Cascade County below 5000ft; Judith Basin County and Judith Gap
Effective: 2026-05-13 @ 12:48 am -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-14 @ 1:00 am -> 2026-05-14 @ 7:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 12:48 am
Headline: High Wind Warning issued May 12 at 11:48PM MDT until May 14 at 6:00PM MDT by NWS Great Falls MT
Description: * WHAT...Westerly winds 35 to 45 mph with gusts up to 70 mph
expected.

* WHERE...Eastern Toole and Liberty Counties, Cascade County below
5000ft, and Judith Basin County and Judith Gap.

* WHEN...From midnight Wednesday Night to 6 PM MDT Thursday.

* IMPACTS...High winds may move loose debris, damage property and
cause isolated power outages. Travel could be difficult,
especially for high profile vehicles.

Alert: High Wind Warning
Area(s): Big Belt, Bridger and Castle Mountains
Effective: 2026-05-13 @ 12:48 am -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-13 @ 1:00 pm -> 2026-05-13 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 12:48 am
Headline: High Wind Warning issued May 12 at 11:48PM MDT until May 13 at 9:00PM MDT by NWS Great Falls MT
Description: * WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph
expected.

* WHERE...Big Belt, Bridger and Castle Mountains.

* WHEN...From noon to 9 PM MDT Wednesday.

* IMPACTS...High winds may move loose debris, damage property and
cause isolated power outages. Travel could be difficult,
especially for high profile vehicles.

* ADDITIONAL DETAILS...There will also be widely scattered showers
and thunderstorms capable of producing localized wind gusts
between 60 and 80 mph Wednesday afternoon and evening.

Alert: High Wind Warning
Area(s): Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Northwest Beaverhead County; Beaverhead and Western Madison below 6000ft; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains
Effective: 2026-05-13 @ 12:48 am -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-13 @ 1:00 pm -> 2026-05-13 @ 10:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-05-13 @ 12:48 am
Headline: High Wind Warning issued May 12 at 11:48PM MDT until May 13 at 9:00PM MDT by NWS Great Falls MT
Description: * WHAT...South to southwesterly winds 30 to 40 mph with gusts up to
60 mph possible.

* WHERE...Southwestern Montana along and south of Interstate 90, and
Canyon Ferry Area.

* WHEN...From noon to 9 PM MDT Wednesday.

* IMPACTS...High winds may move loose debris, damage property and
cause power outages. Travel could be difficult, especially for
high profile vehicles.

* ADDITIONAL DETAILS...There will also be widely scattered showers
and thunderstorms capable of producing localized wind gusts
between 60 and 80 mph Wednesday afternoon and evening.

Alert: High Wind Warning
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; Northern Phillips; Southwest Phillips; Northern Valley
Effective: 2026-05-12 @ 11:53 pm -> 2026-05-13 @ 7:00 pm
Onset: 2026-05-13 @ 5:00 pm -> 2026-05-15 @ 1:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-05-12 @ 11:53 pm
Headline: High Wind Warning issued May 12 at 10:53PM MDT until May 15 at 12:00AM MDT by NWS Glasgow MT
Description: * WHAT...West winds 35 to 45 mph with gusts up to 65 mph expected.

* WHERE...Central and Southeast Phillips, Central and Southern
Valley, Garfield, Northern Phillips, Northern Valley, Petroleum,
and Southwest Phillips Counties.

* WHEN...From 4 PM Wednesday to midnight MDT Thursday Night.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles.

Alert: High Wind Warning
Area(s): Daniels; Sheridan; Western Roosevelt; McCone; Richland; Dawson; Prairie; Wibaux; Eastern Roosevelt
Effective: 2026-05-12 @ 11:53 pm -> 2026-05-13 @ 7:00 pm
Onset: 2026-05-14 @ 7:00 am -> 2026-05-15 @ 1:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-05-12 @ 11:53 pm
Headline: High Wind Warning issued May 12 at 10:53PM MDT until May 15 at 12:00AM MDT by NWS Glasgow MT
Description: * WHAT...West winds 35 to 45 mph with gusts up to 65 mph expected.

* WHERE...Daniels, Dawson, Eastern Roosevelt, McCone, Prairie,
Richland, Sheridan, Western Roosevelt, and Wibaux Counties.

* WHEN...From 6 AM Thursday to midnight MDT Thursday Night.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles.

Alert: Hydrologic Outlook
Area(s): Big Horn, MT; Carbon, MT; Golden Valley, MT; Park, MT; Stillwater, MT; Sweet Grass, MT; Wheatland, MT; Yellowstone, MT; Sheridan, WY
Effective: 2026-05-10 @ 4:45 pm -> 2026-05-13 @ 6:15 pm
Onset: 2026-05-10 @ 4:45 pm
Severity: Unknown
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-05-10 @ 4:45 pm
Headline: Hydrologic Outlook issued May 10 at 3:45PM MDT by NWS Billings MT
Description: ESFBYZ

Warm temperatures reaching 10 to 20 degrees above normal will enhance
snowmelt in the mountains this week, resulting in significantly
higher flows on area waterways. Flooding is not expected at this time
due to marginal remaining snowpack in the middle elevations between
6000 and 8000 feet. Rivers such as the Yellowstone and Clarks Fork of
the Yellowstone are forecast to see flows double the current flows by
the end of the week.

Smaller streams and creeks flowing out of the mountains will
experience rises first this week, with larger rivers and streams
further downstream seeing increases by the end of the week.

Those with interests along foothills waterways should be prepared for
higher water levels this week, and move property and livestock away
from rivers, streams, and low lying areas.

Runoff may fill culverts, ditches, and storm drains causing water to
flow over foothills roadways potentially causing damage. Do not drive
over flooded roadways, Turn Around Don't Drown.

Recreationists in the mountains and foothills should be prepared for
changing conditions and use extra caution when near waterways. Flows
will be faster, and the water is very cold.

Stay tuned to the forecast. Please report any flooding to local law
enforcement and have them relay the report to the National Weather
Service.