779  
FXUS65 KGGW 240822  
AFDGGW  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GLASGOW MT  
222 AM MDT THU JUL 24 2025  
   
DISCUSSION
 
 
KEY MESSAGES:  
 
- DRY AND WARMER WEATHER EXPECTED TODAY.  
 
- TEMPERATURES WILL CONTINUE TO WARM ON FRIDAY BUT THERE WILL BE  
CHANCES FOR AFTERNOON AND EVENING AFTERNOON AND EVENING  
THUNDERSTORMS.  
 
- FREQUENT CHANCES FOR SHOWERS AND THUNDERSTORMS BEGIN SATURDAY  
EVENING AND WILL CONTINUE ACROSS THE REGION FOR SEVERAL DAYS.  
 
WEATHER PATTERN OVERVIEW:  
 
MOIST GROUND, LIGHT WINDS AND RH AT OR NEAR 100 PERCENT WILL  
ALLOW FOG TO DEVELOP IN SOME AREAS OF NE MONTANA EARLY THIS  
MORNING. WILL MENTION PATCHY FOG IN THE FORECAST. ANY FOG THAT  
DEVELOPS WILL DISSIPATE BY 9 AM WITH DAYTIME HEATING.  
 
TODAY THROUGH FRIDAY MORNING A WEAK RIDGE OF HIGH PRESSURE BUILDS  
INTO OUR REGION FROM THE SOUTH, BRINGING TEMPERATURES CLOSER TO  
NORMAL FOR THIS TIME OF YEAR WHICH IS IN THE MID TO UPPER 80S IN  
MOST AREAS.  
 
FLOW ALOFT TURNS TO THE WSW ON FRIDAY AND SW OVER THE WEEKEND AS  
AN UPPER TROUGH DIGS ALONG THE PACIFIC COAST. THIS WILL BRING  
MOISTURE BACK INTO THE REGION. CHANCES FOR SHOWERS AND  
THUNDERSTORMS WILL BEGIN FRIDAY AFTERNOON AND EVENING SOUTH OF THE  
MISSOURI RIVER FOLLOWED BY MAINLY DRY WEATHER SATURDAY MORNING.  
 
FREQUENT CHANCES FOR SHOWERS AND THUNDERSTORMS WILL BEGIN SATURDAY  
AFTERNOON IN THE EAST AND ACROSS THE ENTIRE REGION SATURDAY  
EVENING. FREQUENT WAVES IN SW FLOW ALOFT WILL CONTINUE THE SHOWERS  
AND THUNDERSTORM CHANCES ON SUNDAY. WHILE AN UPPER RIDGE BUILDS  
OVER THE REGION EARLY NEXT WEEK, MONSOONAL MOISTURE AND CONTINUED  
WAVES ON THE PERIPHERY OF THE RIDGE WILL KEEP SHOWER AND  
THUNDERSTORM CHANCES GOING OVER THE REGION FOR SEVERAL DAYS.  
 
FORECAST CONFIDENCE & DEVIATIONS:  
 
HIGH CONFIDENCE ON THE WARMER TEMPERATURES TODAY AND FRIDAY. LOW  
CONFIDENCE ON THE TIMING AND LOCATION OF ANY FOG THIS MORNING. LOW  
CONFIDENCE ON ANY SHOWER AND THUNDERSTORM CHANCES FRIDAY AFTERNOON  
AND BEYOND.  
 
OTHER THAN BEING MORE GENEROUS THAN THE NBM WITH THE PATCHY FOG  
THIS MORNING, NO CHANGES TO THE BASE FORECAST FOR NOW.  
 

 
   
AVIATION
 
 
LAST UPDATE: 0815Z  
 
FLIGHT CAT RANGE: VFR - AIRPORT SHUTDOWN.  
 
DISCUSSION: MAINLY VFR. HOWEVER, MOISTURE IN THE LOWER ATMOSPHERE  
WILL BRING CHANCES FOR FOG THROUGH 15Z AT KOLF, KGGW, AND KSDY  
RESPECTIVELY. CHANCES FOR THIS FOG COULD DROP VISIBILITY TO LESS  
THAN 1SM AT TIMES MAINLY BETWEEN 10Z AND 14Z AND AIRPORT SHUTDOWN  
COULD OCCUR. WILL HANDLE THE LOWEST VISIBILITIES THIS MORNING  
WITH A TEMPO. FOG SHOULD CLEAR UP QUICKLY WITH SUNRISE LEAVING A  
VFR CONDITIONS TODAY AND TONIGHT.  
 
WIND: LIGHT AND VARIABLE EARLY THIS MORNING BECOMING SOUTH TO SW 5  
TO 10 KNOTS BY LATE MORNING. WINDS WILL BECOME SE 5 TO 10 KNOTS  
THIS EVENING.  
 

 
   
GGW WATCHES/WARNINGS/ADVISORIES
 
 
NONE.  

 
 

 
 
WEATHER.GOV/GLASGOW  
 
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