Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Special Weather Statement
Area(s): Madison River Valley; Beaverhead and Western Madison below 6000ft; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains
Effective: 2026-07-10 @ 5:42 pm -> 2026-07-10 @ 6:45 pm
Onset: 2026-07-10 @ 5:42 pm
Severity: Moderate
Certainty: Observed
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-07-10 @ 5:42 pm
Headline: Special Weather Statement issued July 10 at 4:42PM MDT by NWS Great Falls MT
Description: At 441 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 19 miles northeast of Lima to 13 miles south of
Virginia City. Movement was northeast at 15 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.

Locations impacted include...
Virginia City, Ennis, Jeffers, Cameron, and Mcallister.

Alert: Extreme Heat Warning
Area(s): Central and Southeast Phillips; Central and Southern Valley; Daniels; Sheridan; Western Roosevelt; Petroleum; Garfield; McCone; Richland; Dawson; Prairie; Wibaux; Northern Phillips; Southwest Phillips; Northern Valley; Eastern Roosevelt
Effective: 2026-07-10 @ 4:06 pm -> 2026-07-11 @ 4:15 am
Onset: 2026-07-11 @ 7:00 am -> 2026-07-13 @ 7:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2026-07-10 @ 4:06 pm
Headline: Extreme Heat Warning issued July 10 at 3:06PM MDT until July 13 at 6:00AM MDT by NWS Glasgow MT
Description: * WHAT...Dangerously hot conditions with highs between 93 and 104 on
Saturday and highs between 97 and 110 on Sunday expected.

* WHERE...All of northeast Montana.

* WHEN...From 6 AM Saturday to 6 AM MDT Monday.

* IMPACTS...Heat related illnesses are part of the story during
extreme heat and high humidity events like this. Make sure to limit
time in the sun.

* ADDITIONAL DETAILS...Temperatures will struggle to drop below 65
degrees at night, so make sure to have ways of keeping the air cool
in apartments and homes.

Alert: Extreme Heat Warning
Area(s): Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Paradise Valley; Livingston Area; Beartooth Foothills; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Sheridan Foothills
Effective: 2026-07-10 @ 2:01 pm -> 2026-07-11 @ 2:15 pm
Onset: 2026-07-11 @ 7:00 am -> 2026-07-14 @ 1:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2026-07-10 @ 2:01 pm
Headline: Extreme Heat Warning issued July 10 at 1:01PM MDT until July 14 at 12:00AM MDT by NWS Billings MT
Description: * WHAT...Dangerously hot conditions with high temperatures of 100 to
115 expected, hottest Sunday. Some all time record highs are
possible on Sunday.

* WHERE...Portions of central, south central, and southeast Montana
and north central Wyoming.

* WHEN...From 6 AM Saturday to midnight MDT Monday Night.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

* ADDITIONAL DETAILS...Extremely hot daytime temperatures combined
with warm overnight low temperatures will produce cumulative heat
stress. This heat stress will quickly become dangerous to anyone
without adequate cooling and hydration.

Alert: Heat Advisory
Area(s): Eastern Toole and Liberty; Hill County; Northern Blaine County; Southern High Plains; Eastern Pondera and Eastern Teton; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft; Gates of the Mountains; Helena Valley; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley
Effective: 2026-07-10 @ 1:35 pm -> 2026-07-11 @ 7:00 am
Onset: 2026-07-11 @ 1:00 pm -> 2026-07-13 @ 10:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2026-07-10 @ 1:35 pm
Headline: Heat Advisory issued July 10 at 12:35PM MDT until July 13 at 9:00PM MDT by NWS Great Falls MT
Description: * WHAT...Hot daytime temperatures of 95 to 105 degrees, with
overnight temperatures of 60 to 70 degrees expected.

* WHERE...Portions of central, north central, and southwest Montana.

* WHEN...From noon Saturday to 9 PM MDT Monday.

* IMPACTS...Hot temperatures may cause heat illnesses.

Alert: Fire Weather Watch
Area(s): Gallatin National Forest
Effective: 2026-07-10 @ 12:09 pm -> 2026-07-11 @ 12:15 pm
Onset: 2026-07-12 @ 9:00 am -> 2026-07-12 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-07-10 @ 12:09 pm
Headline: Fire Weather Watch issued July 10 at 11:09AM MDT until July 12 at 9:00PM MDT by NWS Billings MT
Description: The National Weather Service in Billings has issued a Fire Weather
Watch...which is in effect from Sunday morning through Sunday
evening.

* IMPACTS: Low humidities, hot temperatures, strong gusty winds,
and wind shift with a cold front late may create erratic fire
behavior.

* AFFECTED AREA:
In South Central MT Fire Zone...123.

* COUNTIES AFFECTED:
In South Central MT...Park...Sweet Grass.
In Southwest MT...Gallatin.

* WIND: South 10 to 20 mph with gusts up to 35 mph.

* HUMIDITY: As low as 9 percent.

* TEMPERATURES: Up to 105.

* COLD FRONT:

Alert: Fire Weather Watch
Area(s): Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County; Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM
Effective: 2026-07-10 @ 12:09 pm -> 2026-07-11 @ 12:15 pm
Onset: 2026-07-12 @ 9:00 am -> 2026-07-12 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Billings MT on 2026-07-10 @ 12:09 pm
Headline: Fire Weather Watch issued July 10 at 11:09AM MDT until July 12 at 9:00PM MDT by NWS Billings MT
Description: * IMPACTS: Low humidities, very hot temperatures, strong gusty
winds may create erratic fire behavior.


* AFFECTED AREA:
In North Central WY Fire Zone...274.
In South Central MT Fire Zones...124...125...126...127...128
129.
In Southeast MT Fire Zones...130...131...132.
In Southeast MT and Northwest SD Fire Zone...133.

* COUNTIES AFFECTED:
In Central MT...Golden Valley...Musselshell...Wheatland.
In North Central WY...Sheridan.
In Northwest SD...Harding.
In South Central MT...Big Horn...Carbon...Park...Stillwater
Sweet Grass...Yellowstone.
In Southeast MT...Carter...Custer...Fallon...Powder River
Rosebud...Treasure.

* WIND: South 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: As low as 7 percent.

* TEMPERATURES: Up to 112.

Alert: Fire Weather Watch
Area(s): Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest
Effective: 2026-07-10 @ 11:34 am -> 2026-07-10 @ 7:45 pm
Onset: 2026-07-12 @ 1:00 pm -> 2026-07-12 @ 10:00 pm
Severity: Severe
Certainty: Possible
Urgency: Future
Issued By: NWS Missoula MT on 2026-07-10 @ 11:34 am
Headline: Fire Weather Watch issued July 10 at 10:34AM MDT until July 12 at 9:00PM MDT by NWS Missoula MT
Description: ...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY
EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST
BEAVERHEAD AND EAST BEAVERHEAD...

The National Weather Service in Missoula MT has issued a Fire Weather
Watch.

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

* TIMING...From Sunday afternoon through Sunday evening.

* WINDS...Southwest winds 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...Relative Humidity between 8 to 15 percent in
the lower elevations of Zone 111 (East Beaverhead); 10 to 15
percent for Zone 110 (Deerlodge/West Beaverhead)

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