508
WWUS75 KBYZ 100649
NPWBYZ
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BILLINGS MT
1249 AM MDT FRI JUL 10 2026
MTZ029>034-036-037-040-042-056>058-063>066-138-139-141-169-170-172-
173-228-235-WYZ199-110700-
/O.UPG.KBYZ.XH.A.0001.260711T1200Z-260714T0600Z/
/O.NEW.KBYZ.XH.W.0001.260711T1200Z-260714T0600Z/
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-
INCLUDING THE LOCATIONS OF ROUNDUP, PRYOR, COLUMBUS, LIMESTONE,
BROADUS, LAVINA, NYE, DEAN, JOLIET, RYEGATE, HARDIN, CROW AGENCY,
EMIGRANT, PINE CREEK, POMPEYS PILLAR, HARLOWTON, MELVILLE, ABSAROKEE,
FROMBERG, BILLINGS, FISHTAIL, MINER, SHERIDAN, HYSHAM, LODGE GRASS,
LIVINGSTON, CLYDE PARK, EKALAKA, LAME DEER, MILES CITY, RED LODGE,
PRAY, BRIDGER, COLSTRIP, CUSTER, CORWIN SPRINGS, MC LEOD, JUDITH GAP,
FORT SMITH, BAKER, BIG TIMBER, CHICO, AND FORSYTH
1249 AM MDT FRI JUL 10 2026
...EXTREME HEAT WARNING IN EFFECT FROM 6 AM SATURDAY TO MIDNIGHT MDT
MONDAY NIGHT...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HIGH TEMPERATURES OF 100 TO
113 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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DRINK PLENTY OF FLUIDS, STAY IN AN AIR-CONDITIONED ROOM, STAY OUT OF
THE SUN, PLAN OUTDOOR ACTIVITIES DURING THE EARLY MORNING AND LATE
EVENING HOURS, AND CHECK UP ON RELATIVES AND NEIGHBORS.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
ADDITIONAL GRAPHICS FOR THIS HAZARD CAN BE FOUND AT
HTTP://WWW.WEATHER.GOV/BILLINGS
LESTER
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