003
WWUS75 KMSO 241843
NPWMSO
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1243 PM MDT FRI APR 24 2026
IDZ005-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
NORTHERN CLEARWATER MOUNTAINS-
1143 AM PDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 7 AM PDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 22 EXPECTED. THERE IS A
30 PERCENT CHANCE FOR A HARD FREEZE IN POPULATED AREAS ABOVE 2500
FEET.
* WHERE...NORTHERN CLEARWATER MOUNTAINS.
* WHEN...FROM 11 PM THIS EVENING TO 7 AM PDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S).
* ADDITIONAL DETAILS...ADDITIONAL FROSTS OR FREEZES ARE POSSIBLE
THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
IDZ006-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
SOUTHERN CLEARWATER MOUNTAINS-
1143 AM PDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 7 AM PDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS THE TEENS EXPECTED.
THERE IS A 90 PERCENT CHANCE FOR A HARD FREEZE IN POPULATED AREAS
ABOVE 2500 FEET.
* WHERE...SOUTHERN CLEARWATER MOUNTAINS.
* WHEN...FROM 11 PM THIS EVENING TO 7 AM PDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S OR COLDER).
* ADDITIONAL DETAILS...ADDITIONAL FROSTS OR FREEZES ARE POSSIBLE
THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
IDZ010-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
EASTERN LEMHI COUNTY-
1243 PM MDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 17 EXPECTED IN THE
SALMON AREA, BUT AS LOW AS 13 DEGREES TOWARDS LEADORE AND GILMORE.
THERE IS A 80 PERCENT CHANCE FOR A HARD FREEZE.
* WHERE...EASTERN LEMHI COUNTY.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S OR COLDER).
* ADDITIONAL DETAILS...ADDITIONAL FROSTS OR FREEZES ARE POSSIBLE
THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
MTZ001-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
KOOTENAI/CABINET REGION-
1243 PM MDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 22 EXPECTED DURING THE
EARLY MORNINGS. THERE IS A 90 PERCENT CHANCE FOR A HARD FREEZE
BETWEEN STRYKER AND WHITEFISH, AND 50 PERCENT CHANCE FOR MARION
BOTH MORNINGS. FOR SATURDAY MORNING THERE IS A 45 PERCENT CHANCE
FOR A HARD FREEZE IN EUREKA.
* WHERE...KOOTENAI/CABINET REGION.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S).
* ADDITIONAL DETAILS...FOR SATURDAY MORNING, THE COMBINATION OF
CLOUD COVER TOWARDS THE US-93 CORRIDOR, AND LIGHT EASTERLY WINDS
THROUGH THE CANYONS OF THE WHITEFISH RANGE COULD PREVENT THE
COLDEST TEMPERATURES FROM OCCURRING.
FOR SUNDAY MORNING, THE EASTERLY WINDS WILL BE A LITTLE BIT
STRONGER AND THERE COULD BE A BIT MORE CLOUD COVER FROM BULL LAKE
TO LIBBY AND POINTS NORTH AND EAST, INCLUDING EUREKA. ADDITIONAL
FROSTS OR FREEZES ARE POSSIBLE THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
MTZ003-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
FLATHEAD/MISSION VALLEYS-
1243 PM MDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 20 EXPECTED DURING THE
EARLY MORNINGS IN THE FLATHEAD AND MISSION VALLEYS. AREAS ADJACENT
TO FLATHEAD LAKE MAY SEE A RANGE FROM 25 TO 31 DEGREES. THERE IS A
25% CHANCE FOR A HARD FREEZE, LESS THAN 25 DEGREES, IN THE COLDER
AREAS INCLUDING WEST VALLEY AND THE MISSION VALLEY.
* WHERE...FLATHEAD/MISSION VALLEYS.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE.
* ADDITIONAL DETAILS...FOR SATURDAY MORNING, THE COMBINATION OF
CLOUD COVER TOWARDS THE CONTINENTAL DIVIDE, AND LIGHT EASTERLY
WINDS THROUGH THE CANYONS COULD PREVENT THE COLDEST TEMPERATURES
FROM OCCURRING.
FOR SUNDAY MORNING, THE EASTERLY WINDS COULD BE A LITTLE BIT
STRONGER AND THERE COULD BE A BIT MORE CLOUD COVER OVER THE
FLATHEAD VALLEY. ADDITIONAL FROSTS OR FREEZES ARE POSSIBLE THROUGH
WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
MTZ004-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
LOWER CLARK FORK REGION-
1243 PM MDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 22 EXPECTED. THERE IS A
55 PERCENT CHANCE FOR A HARD FREEZE IN EVARO, AND 30 PERCENT
CHANCE BETWEEN SAINT REGIS AND LOOKOUT PASS MAINLY ON SATURDAY
MORNING.
* WHERE...LOWER CLARK FORK REGION.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S).
* ADDITIONAL DETAILS...ADDITIONAL FROSTS OR FREEZES ARE POSSIBLE
THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
MTZ005-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
MISSOULA/BITTERROOT VALLEYS-
1243 PM MDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 22 EXPECTED. THE AREAS
NEAR THE RIVER IN THE BITTERROOT VALLEY COULD BE AS LOW AS 15
DEGREES. THERE IS A 80 PERCENT CHANCE FOR A HARD FREEZE FROM
MISSOULA TO THE BITTERROOT VALLEY SATURDAY MORNING.
* WHERE...MISSOULA/BITTERROOT VALLEYS.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S OR COLDER).
* ADDITIONAL DETAILS...FOR SATURDAY MORNING, THE COMBINATION OF
PATCHY CLOUD COVER AND LIGHT EASTERLY WINDS THROUGH HELLGATE
CANYON COULD PREVENT THE COLDEST TEMPERATURES FROM OCCURRING ON
THESE AREAS.
FOR SUNDAY MORNING, THE EASTERLY WINDS COULD BE A LITTLE BIT
STRONGER IN MISSOULA PROPER AND PORTIONS OF THE NORTHERN
BITTERROOT VALLEY WHICH MAY HELP KEEP TEMPERATURES MILDER, BUT
AREAS OUTSIDE OF THE WIND COULD BE COLDER. ADDITIONAL FROSTS OR
FREEZES ARE POSSIBLE THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
MTZ006-261400-
/O.NEW.KMSO.FZ.W.0001.260425T0600Z-260426T1400Z/
BITTERROOT/SAPPHIRE MOUNTAINS-
1243 PM MDT FRI APR 24 2026
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
SUNDAY...
* WHAT...SUB-FREEZING TEMPERATURES AS LOW AS 13 EXPECTED.
* WHERE...BITTERROOT/SAPPHIRE MOUNTAINS.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S OR COLDER).
* ADDITIONAL DETAILS...ADDITIONAL FROSTS OR FREEZES ARE POSSIBLE
THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
IDZ007-261400-
/O.NEW.KMSO.FR.Y.0001.260425T0600Z-260426T1400Z/
OROFINO/GRANGEVILLE REGION-
1143 AM PDT FRI APR 24 2026
...FROST ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 7 AM PDT
SUNDAY...
* WHAT...TEMPERATURES AS LOW AS 27 WILL RESULT IN FROST FORMATION.
* WHERE...OROFINO/GRANGEVILLE REGION.
* WHEN...FROM 11 PM THIS EVENING TO 7 AM PDT SUNDAY.
* IMPACTS...FROST COULD HARM SENSITIVE OUTDOOR VEGETATION. SENSITIVE
OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.
* ADDITIONAL DETAILS...ADDITIONAL FROSTS ARE POSSIBLE THROUGH
WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
IDZ009-261400-
/O.NEW.KMSO.FR.Y.0001.260425T0600Z-260426T1400Z/
WESTERN LEMHI COUNTY-
1243 PM MDT FRI APR 24 2026
...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MDT
SUNDAY...
* WHAT...TEMPERATURES AS LOW AS 23 IN POPULATED AREAS WILL RESULT IN
FROST FORMATION. THERE IS A 30 PERCENT CHANCE FOR A HARD FREEZE.
* WHERE...WESTERN LEMHI COUNTY.
* WHEN...FROM MIDNIGHT TONIGHT TO 8 AM MDT SUNDAY.
* IMPACTS...FROST AND FREEZE CONDITIONS COULD KILL CROPS, OTHER
SENSITIVE VEGETATION. POSSIBLE DAMAGE TO UNPROTECTED OUTDOOR
PLUMBING AND IRRIGATION SYSTEMS WITH THE HARD FREEZE(TEMPERATURES
IN THE LOWER 20S).
* ADDITIONAL DETAILS...ADDITIONAL FROSTS OR FREEZES ARE POSSIBLE
THROUGH WEDNESDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
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