434  
FXUS65 KTFX 161556  
AFDTFX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
956 AM MDT TUE OCT 16 2018  
   
SYNOPSIS
 
 
A HIGH PRESSURE RIDGE PERSISTS OVER OUR AREA THROUGH THIS WEEKEND.  
SIMULTANEOUSLY, FAIR WEATHER IS EXPECTED AND TEMPERATURES WILL  
PRIMARILY BE ABOVE-NORMAL.  
 

 
   
UPDATE
 
 
UPDATED FORECAST IS OUT. MAIN CHANGE WAS TO ADJUST SKY COVER  
TOWARDS CURRENT TRENDS. OTHER CONCERN IS THE VALLEYS OF SOUTHWEST  
MT, TEMPERATURES WILL BE SLOW TO RISE IN THE VALLEYS WITH LIGHT  
WINDS, BUT LEFT CURRENT FORECAST AS IS FOR NOW. BRUSDA  
 

 
 
   
AVIATION
 
 
UPDATED 1051Z.  
VFR AND MAINLY NORTHWESTERLY TO NORTHERLY FLOW ALOFT PERSIST NEXT  
24- HOURS AS HIGH PRESSURE ALOFT CONTINUES TO BUILD FROM THE  
WEST. MULTIPLE, SUBTLE DISTURBANCES EMBEDDED WITHIN THIS FLOW  
YIELD VARIABLE MID- TO UPPER-LEVEL CLOUDINESS THROUGH ABOUT  
00Z/WED, WITH SKIES EXPECTED TO CLEAR CONSIDERABLY THEREAFTER.  
SURFACE WINDS LIKELY REMAIN LIGHT.  
- JASZKA  
 

 
   
PREV DISCUSSION
 
 
/ISSUED 451 AM MDT TUE OCT 16 2018/  
 
TODAY THROUGH NEXT TUESDAY...A HIGH PRESSURE RIDGE ALOFT DRIFTS  
EASTWARD OVER OUR CWA THROUGH MONDAY OF NEXT WEEK, RESULTING IN A  
PROLONGED PERIOD OF FAIR WEATHER. HOWEVER, THIS RIDGE IS STILL  
EXPECTED TO WEAKEN TEMPORARILY WEDNESDAY THROUGH FRIDAY AS SHORTWAVE  
DISTURBANCES MOVE GENERALLY EASTWARD AND SOUTHEASTWARD OVER WESTERN  
AND CENTRAL CANADA, TOWARD THE GREAT LAKES. SIMULTANEOUSLY, A  
CUT-OFF LOW ALOFT OVER THE SOUTHWEST U.S. FINALLY EJECTS  
NORTHEASTWARD. A FEW RAIN AND MOUNTAIN SNOW SHOWERS MAY AFFECT  
SOUTHWEST MT NEXT WEEK TUESDAY AS THE RIDGE MOVES FARTHER EASTWARD  
AND A SHORTWAVE TROUGH OVERSPREADS OUR REGION FROM THE SOUTHWEST.  
HIGH AND LOW TEMPERATURES WILL BE NEAR OR ABOVE-NORMAL THROUGH  
THE PERIOD. IN GENERAL, WEDNESDAY AND SATURDAY LOOK TO BE THE  
WARMEST DAYS, WITH HIGHS REACHING WELL INTO THE 60'S FOR MOST  
PLAINS AND VALLEY LOCATIONS.  
- JASZKA  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
GTF 61 34 65 39 / 0 0 0 0  
CTB 60 31 65 37 / 0 0 0 0  
HLN 60 33 63 37 / 0 0 0 0  
BZN 56 29 61 31 / 0 0 0 0  
WEY 52 20 57 23 / 0 0 0 0  
DLN 56 29 59 31 / 0 0 0 0  
HVR 64 35 67 37 / 0 0 0 0  
LWT 58 34 64 37 / 0 0 0 0  
 

 
   
TFX WATCHES/WARNINGS/ADVISORIES
 
 
NONE.  
 

 
 

 
 
HTTP://WWW.WEATHER.GOV/GREATFALLS  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab MT Page Main Text Page