688  
FXUS65 KGGW 070335  
AFDGGW  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GLASGOW MT  
835 PM MST THU FEB 6 2025  
   
DISCUSSION  
 
KEY MESSAGES:  
 
1) THE NEXT ROUND OF ACCUMULATING SNOW WILL AFFECT LOCATIONS  
MAINLY SOUTH OF THE MISSOURI RIVER ON FRIDAY AND FRIDAY NIGHT.  
 
2) BELOW AVERAGE TEMPERATURES WILL PERSIST THROUGHOUT THE BALANCE  
OF THE FORECAST PERIOD OVER THE NEXT 7 DAYS.  
 
WEATHER PATTERN OVERVIEW:  
ENSEMBLES CONTINUE TO SHOW CONSENSUS FOR ACCUMULATING SNOW ALONG  
AND SOUTH OF THE MISSOURI RIVER ON FRIDAY. THE SNOW WILL REACH OUR  
SOUTHWESTERN ZONES EARLY FRIDAY MORNING, SPREAD EAST AND BECOME  
STEADIER DURING THE DAY, AND EXIT FRIDAY NIGHT. A WINTER WEATHER  
ADVISORY HAS BEEN ISSUED FROM 5 AM FRIDAY UNTIL 5 AM SATURDAY. A  
BROAD 2 TO 5 INCHES OF SNOWFALL IS EXPECTED OVER THE 24 HOUR  
PERIOD ACROSS THIS AREA WITH THE HIGHEST TOTALS EXPECTED ACROSS  
PETROLEUM COUNTY. IN FACT, ISOLATED 6 INCH TOTALS COULD RESULT  
OVER FAR SOUTHERN PETROLEUM COUNTY. GIVEN LACK OF COVERAGE AND FOR  
SIMPLER MESSAGING, HAVE OPTED TO KEEP ALL AFFECTED ZONES AS A  
COHESIVE ADVISORY FOR NOW.  
 
SATURDAY ONWARD, LOOK FOR COLD WEATHER TO CONTINUE WITH  
REINFORCING ARCTIC AIR ON SUNDAY WITH ANOTHER POTENTIAL ROUND FOR  
LIGHT SNOW. IN GENERAL, BITTERLY COLD TEMPERATURES LOOK TO PERSIST  
OVER THE NEXT 7 DAYS THROUGHOUT THE ENTIRE FORECAST PERIOD.  
 
FORECAST CONFIDENCE & DEVIATIONS:  
NBM CAPTURED THE FORECAST WELL WITH HIGH CONFIDENCE FOR BOTH THE  
FRIDAY SNOW AND THE COLD TEMPERATURES THROUGHOUT THE PERIOD.  
PERHAPS THE ONLY POINTS OF UNCERTAINTY ARE THE EXACT NORTHERN  
EXTENT OF THE SNOW AS WELL AS COVERAGE OF THE 6 INCH TOTALS ACROSS  
SOUTHERN PETROLEUM COUNTY.  
 
 
   
AVIATION  
 
LAST UPDATE: 0330Z  
 
FLIGHT CAT RANGE: VFR - IFR  
 
DISCUSSION: VFR CONDITIONS WILL PERSIST TONIGHT. MVFR CEILINGS  
WILL BEGIN IMPACTING KGGW AROUND ~15Z AND THEN SPREAD TO THE REST  
OF THE TERMINALS BY ABOUT 18-21Z. SNOW COULD BEGIN AT KGDV AND  
KSDY AROUND 20-22Z AND WILL LIKELY DRAG IN IFR VISIBILITIES  
THROUGH THE EVENING HOURS FOR THE SOUTHERN TERMINALS WITH ANY SNOW.  
KGGW AND KOLF ARE AT THE NORTHERN EXTENT OF THE SNOW LINE AND MAY  
ONLY EXPERIENCE A FEW FLURRIES(10-30%). MVFR CEILINGS SHOULD  
CLEAR OUT OF ALL TERMINALS BY MID-DAY SATURDAY.  
 
WIND: LIGHT AND VARIABLE TONIGHT THROUGH FRIDAY MORNING. BECOMING  
NE AND INCREASING TO AROUND 5 TO 15 KTS OR LESS FRIDAY AFTERNOON.  
THEN BACKING N AND BECOMING LIGHT FRIDAY NIGHT.  
 
GAH  
 
 
   
GGW WATCHES/WARNINGS/ADVISORIES  
 
WINTER WEATHER ADVISORY FROM 5 AM FRIDAY TO 5 AM MST SATURDAY  
FOR DAWSON-GARFIELD-MCCONE-PETROLEUM-PRAIRIE-SOUTHWEST PHILLIPS-  
WIBAUX.  
 
 
 
 
 
WEATHER.GOV/GLASGOW  
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