985  
WWUS45 KMSO 181850  
WSWMSO  
 
URGENT - WINTER WEATHER MESSAGE  
NATIONAL WEATHER SERVICE MISSOULA MT  
1250 PM MDT SAT OCT 18 2025  
 
IDZ006-MTZ002-006-043-201500-  
/O.NEW.KMSO.WW.Y.0038.251020T0300Z-251020T1500Z/  
SOUTHERN CLEARWATER MOUNTAINS-WEST GLACIER REGION-  
BITTERROOT/SAPPHIRE MOUNTAINS-POTOMAC/SEELEY LAKE REGION-  
1250 PM MDT SAT OCT 18 2025 /1150 AM PDT SAT OCT 18 2025/  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM MDT /8 PM PDT/ SUNDAY  
TO 9 AM MDT /8 AM PDT/ MONDAY ABOVE 5,000 FT...  
 
* WHAT...SNOW EXPECTED ABOVE 5,000 FT. THERE IS A LIKELIHOOD OF  
MINOR TO MODERATE WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS  
UP TO 5 INCHES. THERE IS POTENTIAL FOR 7 TO 12 INCHES IN VERY  
REMOTE LOCATIONS AT THE HIGHEST ELEVATIONS. WINDS GUSTING AS HIGH  
AS 35 MPH. IT IS GOING TO RAIN A LOT BEFORE TRANSITIONING TO SNOW.  
 
* WHERE...THE HIGH ELEVATIONS OF THE BACK COUNTRY AND MOUNTAINS, AS  
WELL AS HIGHWAY 93 SULA TO LOST TRAIL PASS.  
 
* WHEN...FROM 9 PM MDT /8 PM PDT/ SUNDAY TO 9 AM MDT /8 AM PDT/  
MONDAY.  
 
* IMPACTS...WINTER TRAVELING CONDITIONS. FOR MODERATE WINTER WEATHER  
IMPACTS, EXPECT DISRUPTIONS TO NORMAL ACTIVITIES. FOR MINOR WINTER  
WEATHER IMPACTS, EXPECT A FEW INCONVENIENCES TO NORMAL ACTIVITIES.  
USE CAUTION WHILE DRIVING. DIRT ROADS ON PUBLIC LANDS COULD BECOME  
DIFFICULT OR DANGEROUS FOR TRAVEL AFTER HEAVY RAINS FOLLOWED BY  
SNOW. COLD, WET, AND WINDY CONDITIONS WILL BE IDEAL FOR CAUSING  
HYPOTHERMIA.  
 
* ADDITIONAL DETAILS...ELEVATIONS BELOW 5,000 FT WILL STILL SEE  
HEAVY RAIN AND POTENTIALLY SOME SNOW. CONDITIONS AT LOWER  
ELEVATIONS WILL BE INCONVENIENT AND UNCOMFORTABLE.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD  
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY  
CALLING 5 1 1. BE PREPARED FOR COLD, WET WEATHER AND DIFFICULT BACK  
COUNTRY TRAVEL CONDITIONS.  
 
 
 
 
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