928  
FXUS65 KGGW 291550 AAA  
AFDGGW  
 
AREA FORECAST DISCUSSION...UPDATED  
NATIONAL WEATHER SERVICE GLASGOW MT  
950 AM MDT THU JUL 29 2021  
   
DISCUSSION
 
 
SENT AN UPDATE THIS MORNING MAINLY TO DROP TEMPERATURES A FEW  
DEGREES DUE TO THE EXTENSIVE CLOUD COVER, AND TO ADJUST CHANCES  
FOR PRECIPITATION, FOLLOWING RECENT RADAR TRENDS BLENDING WITH THE  
BEST NEAR-TERM MODEL CONSENSUS I COULD FIND. SPOTTY, HIT-AND-MISS  
SEEMS TO BE THE BEST DESCRIPTION OF CHANCES FOR RAIN SHOWERS TODAY  
THROUGH TONIGHT.  
 
PREVIOUS DISCUSSION: A SHORTWAVE MOVES ACROSS THE RIDGE IN  
MONTANA TODAY AND THIS EVENING WITH SOME MONSOONAL MOISTURE THAT  
COULD PRODUCE A FEW SHOWERS AND THUNDERSTORMS WITH THE BEST CHANCE  
BEING SOUTH OF THE MISSOURI RIVER. MANY AREAS WILL SEE LITTLE OR  
NO MEASURABLE PRECIPITATION WITH A VERY DRY ATMOSPHERE IN THE  
LOWER LEVELS WITH THIS SYSTEM. CLOUD COVER TODAY WILL KEEP  
TEMPERATURES SOMEWHAT COOLER THAN THEY HAVE BEEN LATELY. SKIES  
WILL CLEAR LATE TONIGHT AS THE WAVE MOVES TO THE EAST.  
 
THE RIDGE AXIS BACKS TO THE WEST TONIGHT AND BUILDS OVER THE  
CANADIAN ROCKIES AND WESTERN MONTANA AND IDAHO ON FRIDAY. THIS  
WILL TURN THE FLOW ALOFT TO THE NW ON FRIDAY. CLEAR SKIES WILL  
ALLOW FOR WARMER TEMPERATURES THAT WILL BE IN THE MID 80S TO MID  
90S FOR HIGHS.  
 
THE RIDGE EXPANDS INTO ALL OF MONTANA OVER THE WEEKEND WITH HOT  
AND DRY WEATHER CONTINUING WITH HIGHS IN THE 90S IN MOST AREAS.  
THE RIDGE AXIS DRIFTS EAST ON MONDAY KEEPING THE HOT AND DRY  
WEATHER OVER THE AREA.  
 
MODELS ARE POINTING TOWARDS A SHORTWAVE TROUGH MOVING INTO  
WESTERN MONTANA ON MONDAY AND REACHES EASTERN MONTANA ON TUESDAY  
THAT IS EXPECTED TO FLATTEN THE RIDGE. THE SYSTEM COULD BRING A  
CHANCE OF SHOWERS AND THUNDERSTORMS.  
 

 
   
AVIATION
 
 
LAST UPDATED: 1545Z  
 
FLIGHT CAT: MAINLY VFR  
 
SMOKE AND HAZE: TEMPORARY MVFR MAY OCCUR AT TIMES DUE TO HAZE AND  
SMOKE. MOST HAZE RESTRICTIONS WILL REMAIN SOUTHWEST OF THE  
TERMINALS THIS MORNING BUT COULD DRIFT INTO THE AREA THIS  
AFTERNOON AND EVENING.  
 
DISCUSSION: THERE WILL BE MID AND HIGH LEVEL CLOUDS MOST OF THE  
TIME OVER THE AREA TODAY AND THIS EVENING BRINGING MONSOONAL  
MOISTURE. ISOLATED SHOWERS AND THUNDERSTORMS ARE POSSIBLE BUT  
SHOULD NOT RESTRICT VISIBILITY. SKIES WILL CLEAR LATE TONIGHT.  
 
WIND: SOUTHEAST AT 5 TO 10 KTS THIS MORNING, INCREASING TO 10 TO  
20 KTS THIS AFTERNOON. SOUTHEAST WINDS WILL DIMINISH TO 5 TO 10  
KNOTS LATE TONIGHT.  
 

 
   
GLASGOW WATCHES/WARNINGS/ADVISORIES
 
NONE.  
 

 
 

 
 
WEATHER.GOV/GLASGOW  
 
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