182  
FXUS65 KGGW 080847  
AFDGGW  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GLASGOW MT  
247 AM MDT THU MAY 8 2025  
   
DISCUSSION
 
 
KEY MESSAGES:  
 
- WEAK DISTURBANCE COULD BRING SCATTERED RAIN SHOWERS AND ISOLATED  
THUNDERSTORMS THIS AFTERNOON AND EVENING, MAINLY SOUTH OF THE  
MISSOURI RIVER.  
 
- TEMPERATURES WILL CONTINUE TO WARM INTO THE WEEKEND WITH HIGHS  
ABOVE 90 POSSIBLE ON SATURDAY.  
 
WEATHER PATTERN OVERVIEW:  
 
REX BLOCK PATTERN IS BEGINNING TO EVOLVE INTO MORE OF DISJOINTED  
FLOW OVER THE NEXT FEW DAYS. A SHORTWAVE TROUGH WILL PUSH THROUGH  
THE CANADIAN RIDGE TODAY DRAGGING A WEAK FRONT ACROSS MONTANA.  
THIS FLOW PATTERN AND AIR MASS INTERACTION WILL BE ENOUGH TO SET  
OFF SOME SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS DURING  
THE AFTERNOON AND EVENING TODAY. BEST CHANCES FOR THESE GENERAL  
THUNDERSTORMS WILL RESIDE SOUTH OF THE MISSOURI RIVER.  
 
FRIDAY THROUGH SATURDAY, THE VERY WARM RIDGE OF HIGH PRESSURE  
BUILDS UP FROM THE GREAT BASIN, ALL THE WAY THROUGH THE NORTHERN  
ROCKIES AND THE HIGH PLAINS. THIS SET UP WILL EASILY RESULT IN  
NEAR RECORD HIGH TEMPERATURES, ESPECIALLY ON SATURDAY WITH MANY  
LOCATIONS REACHING ABOVE 90 DEGREES. FIRE WEATHER CONCERNS MAY  
INCREASE IF FORECAST WINDS BECOME STRONGER AND/OR FORECAST  
HUMIDITY DROPS MORE.  
 
BEGINNING LATER ON SATURDAY, THE HIGH PRESSURE RIDGE GIVES WAY TO  
AN ENCROACHING LOW PRESSURE TROUGH FROM THE WEST, WHICH WILL ALLOW  
FOR INCREASING CHANCES FOR OFF-AND-ON SHOWERS AND THUNDERSTORMS  
EACH DAY NEXT WEEK, WITH OVERALL AVERAGE CONFIDENCE BECOME GREATER  
WITH TIME.  
 
FORECAST CONFIDENCE & DEVIATIONS:  
 
FOR TODAY AND TONIGHT, USED A BEST CONSENSUS BLEND TO HIGHLIGHT  
ISOLATED THUNDERSTORMS AND THEIR POSSIBLE DOWNDRAFT WINDS.  
OTHERWISE, USED THE GIVEN NBM FOR THE REMAINDER OF THE FORECAST.  
 
CONFIDENCE IS ABOVE AVERAGE FOR HOT TEMPERATURES THIS WEEKEND.  
CONFIDENCE IS AVERAGE FOR SHOWERS AND THUNDERSTORM CHANCES EARLY  
NEXT WEEK.  
 

 
   
AVIATION
 
 
VFR WITH MOSTLY CLEAR SKIES ARE EXPECTED THROUGH EARLY AFTERNOON.  
A FEW ISOLATED SHOWERS OR THUNDERSTORMS MAY BE POSSIBLE NEAR KGDV  
DURING THE AFTERNOON OR EARLY EVENING.  
 

 
   
GGW WATCHES/WARNINGS/ADVISORIES
 
 
NONE.  

 
 

 
 
WEATHER.GOV/GLASGOW  
 
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