191  
FXUS65 KGGW 290820  
AFDGGW  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GLASGOW MT  
220 AM MDT FRI AUG 29 2025  
   
DISCUSSION  
 
KEY MESSAGES:  
 
- MONSOONAL MOISTURE WILL BE OVER NE MONTANA IN VARYING DEGREES  
THROUGH SATURDAY AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS  
ARE EXPECTED OVER PARTS OF THE AREA DURING THAT TIME.  
 
- WARM, SUMMER LIKE TEMPERATURES WILL PREVAIL THIS WEEKEND.  
 
- COLD FRONT MOVES IN EITHER MONDAY NIGHT OR TUESDAY, BRINGING  
NORTH WINDS AND THE CHANCE FOR SOME SHOWERS AND THUNDERSTORMS.  
 
WEATHER PATTERN OVERVIEW:  
 
A WEAK UPPER FLOW ALOFT WITHIN AN UPPER TROUGH WILL KEEP VARYING  
DEGREES OF MONSOONAL MOISTURE OVER NE MONTANA TODAY, TONIGHT AND  
SATURDAY. THE OVERALL MOISTURE WILL BE DEEPER OVER CENTRAL AND  
SOUTHERN MONTANA WHICH WILL LIMIT MOST OF THE PRECIPITATION  
CHANCES TO SW OF A LINE NEAR OPHEIM, GLASGOW, CIRCLE AND GLENDIVE.  
MOST OF THE MOISTURE THAT MAKES IT INTO NE MONTANA WILL BE AT THE  
MID AND HIGH LEVELS WHICH WILL RESULT IN MAINLY CLOUDY SKIES  
THROUGH SATURDAY. AT THIS POINT, THERE IS A 30-50 PERCENT  
PROBABILITY OF PHILLIPS, PETROLEUM, AND WESTERN GARFIELD COUNTIES  
RECEIVING AT LEAST A TENTH OF AN INCH OF RAIN FROM THIS SYSTEM  
WHILE AREAS EAST OF GLASGOW, CIRCLE AND GLENDIVE HAVE LESS THAN A  
20 PERCENT CHANCE OF SEEING ANY MEASURABLE PRECIPITATION AT ALL.  
 
THE SYSTEM MOVES TO THE EAST SATURDAY NIGHT AND SUNDAY AND LABOR  
DAY WILL BE WARM AND DRY WITH HIGHS IN THE 80S TO NEAR 90.  
 
A COLD FRONT IS EXPECTED EITHER MONDAY NIGHT OR TUESDAY THAT WILL  
BRING ISOLATED SHOWERS AND THUNDERSTORMS. THERE IS LOW CONFIDENCE  
ON PRECIPITATION AMOUNTS AND LOCATION WITH THIS FRONT. COOLER  
TEMPERATURES WILL PREVAIL TUESDAY AND WEDNESDAY.  
 
THE REMAINDER OF THE WEEK WILL HAVE THE FORECAST AREA IN NW FLOW  
ALOFT BETWEEN A COOL UPPER LOW OVER THE GREAT LAKES AND A VERY  
WARM RIDGE OVER THE ROCKIES AND PACIFIC COAST WITH MAINLY DRY  
WEATHER.  
 
FORECAST CONFIDENCE & DEVIATIONS:  
 
MADE MINOR TWEAKS TO POPS TODAY AND TONIGHT WITH NO OTHER  
CHANGES TO BASE NBM.  
 
THERE IS HIGH CONFIDENCE THAT PETROLEUM AND PHILLIPS COUNTIES WILL  
HAVE PRECIPITATION AT SOME POINT TODAY AND TONIGHT WITH LOW  
CONFIDENCE IN TIMING. CONFIDENCE IN PRECIPITATION IS LOW  
ELSEWHERE. THERE IS HIGH CONFIDENCE IN FORECAST TEMPERATURES OVER  
THE NEXT 4 DAYS AND A COLD FRONT MOVING THROUGH ON MONDAY NIGHT  
INTO TUESDAY.  
 
 
   
AVIATION  
 
LAST UPDATED: 0815Z  
 
FLIGHT CAT RANGE: VFR  
 
DISCUSSION: MID AND HIGH-LEVEL CLOUDS WILL BE OVER THE REGION  
TODAY, TONIGHT AND SATURDAY. ISOLATED TO SCATTERED RAIN SHOWERS  
WILL STAY TO THE WEST AND SOUTH OF THE AIRFIELDS/TERMINALS MOST OF  
THE TIME. A SHOWER TONIGHT COULD REACH AS FAR EAST AS KGGW AND  
KGDV.  
 
WIND: WINDS WILL BE LIGHT AND VARIABLE EARLY. THEN, THE WINDS WILL  
VARY FROM NE, EAST TO SE AT 5 TO 10 KNOTS MOST OF TODAY AND BECOME  
LIGHT AND VARIABLE TONIGHT.  
 
EQUIPMENT: KGDV AWOS IS CURRENTLY NOT SENDING METARS. AMENDMENTS  
WILL NOT BE SCHEDULED.  
 
 
   
GGW WATCHES/WARNINGS/ADVISORIES  
 
NONE.  
 
 
 
 
WEATHER.GOV/GLASGOW  
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