430
WWUS85 KBYZ 012044
RFWBYZ
URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BILLINGS MT
244 PM MDT SAT AUG 1 2026
MTZ133-022045-
/O.EXA.KBYZ.FW.W.0006.260802T0600Z-260803T0300Z/
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-
244 PM MDT SAT AUG 1 2026
...RED FLAG WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 PM MDT
SUNDAY...
THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 PM MDT
SUNDAY.
* IMPACTS: LOW HUMIDITIES, HOT TEMPERATURES, GUSTY WINDS, AND A
WIND SHIFT WITH A COLD FRONT WILL CREATE ERRATIC FIRE BEHAVIOR.
* AFFECTED AREA:
IN SOUTHEAST MT AND NORTHWEST SD FIRE ZONE...133.
* COUNTIES AFFECTED:
IN NORTHWEST SD...HARDING.
IN SOUTHEAST MT...CARTER...FALLON.
* COLD FRONT: A COLD FRONT MOVES THROUGH EARLY SUNDAY MORNING
SHIFTING WINDS TO THE NORTHWEST AND INCREASING WIND SPEEDS.
* WIND: SOUTHEAST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH TONIGHT
BECOMING NORTHWEST 15 TO 25 MPH WITH GUSTS UP TO 35 MPH ALONG AND
BEHIND THE FRONT SUNDAY MORNING.
* HUMIDITY: 25 TO 40 PERCENT SUNDAY MORNING BECOMING AS LOW AS 10
PERCENT BY SUNDAY AFTERNOON.
* TEMPERATURES: HIGH TEMPERATURES OF 90 TO 100 DEGREES ON SUNDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE
EITHER OCCURRING NOW, OR WILL SHORTLY. A COMBINATION OF GUSTY WINDS,
LOW RELATIVE HUMIDITY, AND WARM TEMPERATURES CAN CONTRIBUTE TO
EXTREME FIRE BEHAVIOR.
MTZ123>128-022045-
/O.CON.KBYZ.FW.W.0006.000000T0000Z-260803T0300Z/
GALLATIN NATIONAL FOREST-WHEATLAND COUNTY/SWEET GRASS COUNTY-
STILLWATER COUNTY-BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-YELLOWSTONE COUNTY-
244 PM MDT SAT AUG 1 2026
..RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SUNDAY
* IMPACTS: LOW HUMIDITIES, HOT TEMPERATURES, GUSTY WINDS, AND A
WIND SHIFT WITH A COLD FRONT WILL CREATE ERRATIC FIRE BEHAVIOR.
* AFFECTED AREA:
IN SOUTH CENTRAL MT FIRE ZONES...123...124...125...126...127
128.
* COUNTIES AFFECTED:
IN CENTRAL MT...GOLDEN VALLEY...MUSSELSHELL...WHEATLAND.
IN SOUTH CENTRAL MT...CARBON...PARK...STILLWATER...SWEET GRASS
YELLOWSTONE.
IN SOUTHWEST MT...GALLATIN.
* WIND: SOUTHWEST 10 TO 20 MPH WITH GUSTS UP TO 35 MPH TODAY,
BECOMING NORTHWEST 10 TO 15 WITH GUSTS TO 25 MPH ALONG AND BEHIND
A COLD FRONT TONIGHT INTO SUNDAY MORNING. WINDS BECOME EAST OVER
THE PLAINS AND SOUTHWEST OVER THE MOUNTAINS SUNDAY AFTERNOON.
* HUMIDITY: AS LOW AS 5 PERCENT TODAY AND 10 PERCENT SUNDAY.
* TEMPERATURES: UP TO 105 DEGREES TODAY AND 100 DEGREES SUNDAY.
* COLD FRONT: A COLD FRONT MOVES THROUGH TONIGHT SHIFTING WINDS
FROM THE SOUTHWEST TO THE NORTHWEST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE
EITHER OCCURRING NOW, OR WILL SHORTLY. A COMBINATION OF GUSTY WINDS,
LOW RELATIVE HUMIDITY, AND WARM TEMPERATURES CAN CONTRIBUTE TO
EXTREME FIRE BEHAVIOR.
MTZ129>132-WYZ274-284-022045-
/O.CON.KBYZ.FW.W.0006.260802T0600Z-260803T0300Z/
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT
CUSTER NATL FOREST-CUSTER COUNTY-SHERIDAN COUNTY-
BIGHORN NATIONAL FOREST-
244 PM MDT SAT AUG 1 2026
...RED FLAG WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
9 PM MDT SUNDAY...
* IMPACTS: LOW HUMIDITIES, HOT TEMPERATURES, GUSTY WINDS, AND A
WIND SHIFT WITH A COLD FRONT WILL CREATE ERRATIC FIRE BEHAVIOR.
* AFFECTED AREA:
IN NORTH CENTRAL WY FIRE ZONES...274...284.
IN SOUTH CENTRAL MT FIRE ZONE...129.
IN SOUTHEAST MT FIRE ZONES...130...131...132.
* COUNTIES AFFECTED:
IN NORTH CENTRAL WY...BIG HORN...JOHNSON...SHERIDAN...WASHAKIE.
IN SOUTH CENTRAL MT...BIG HORN...CARBON...YELLOWSTONE.
IN SOUTHEAST MT...CUSTER...POWDER RIVER...ROSEBUD...TREASURE.
* COLD FRONT: A COLD FRONT MOVES THROUGH TONIGHT INTO EARLY SUNDAY
MORNING SHIFTING WINDS TO THE NORTHWEST AND INCREASING WIND
SPEEDS.
* WIND: SOUTH 10 TO 20 MPH AHEAD OF THE FRONT BECOMING NORTHWEST 10
TO 20 MPH WITH GUSTS UP TO 35 MPH ALONG AND BEHIND THE FRONT.
WINDS BECOME NORTHEAST TO EAST SUNDAY AFTERNOON.
* HUMIDITY: 20 TO 35 PERCENT SUNDAY MORNING BECOMING AS LOW AS 10
PERCENT SUNDAY AFTERNOON.
* TEMPERATURES: UP TO 100 DEGREES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE
EITHER OCCURRING NOW, OR WILL SHORTLY. A COMBINATION OF GUSTY WINDS,
LOW RELATIVE HUMIDITY, AND WARM TEMPERATURES CAN CONTRIBUTE TO
EXTREME FIRE BEHAVIOR.
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