999 
FXUS65 KMSO 102030
AFDMSO

WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
230 PM MDT SAT APR 10 1999

CUMULUS OVER THE REGION THIS AFTERNOON WILL DISSIPATE BY SUNSET. THIN
HIGH CLOUDS MOVING ACROSS ID ZONES FROM WEST COAST SYSTEM BUT SHOULD
NOT AMOUNT TO WORDING CHANGES FOR TONIGHTS FORECAST. MODELS IN GOOD
AGREEMENT THROUGH 48-HOURS. HEIGHTS SLOWLY BUILD THROUGH MONDAY WITH
SEVERAL DEGREES WARMING EACH DAY. STRONG WESTERLY JET SWINGS
SHORTWAVE ENERGY THROUGH SOUTHWEST CANADA ON MONDAY. THE AVN MODEL
SHOWS A SURFACE COLD FRONT DROPPING INTO NORTHWEST MT LATE AFTERNOON
MONDAY. MOISTURE SHOULD INCREASE AFTER FROPA OVER NORTHWEST MT WHICH
WOULD AFFECT THE MONDAY NIGHT INTO TUESDAY PERIOD...FOR NOW WILL
LEAVE IN DRY FORECAST THROUGH DAY2. WILL WATCH TIMING OF THIS FRONT
SINCE MINOR COOLING TO AFFECT TEMPERATURES WHEN IT SLIDES THROUGH
WESTERN MT...MOSTLY ON TUESDAY.  BOLDT

EXTENDED...SHORTWAVE RIDING NORTHERN JET PROGGED BY SPECTRAL MODEL
RUNS TO SKIP ACROSS BORDER WITH BRITISH COLUMBIA AND ALBERTA EARLY
TUESDAY. COOL AIR BEHIND FRONTAL BOUNDARY SHOULD NOT MAKE IT VERY FAR
INTO THE CWFA BEFORE RIDGING TAKES OVER. SO WILL ONLY INTRODUCE
SLIGHT COOLING TUESDAY WITH PARTLY CLOUDY SKIES. HEIGHTS RISE MIDWEEK
FOR SUNNY AND WARMER WEATHER. SIGLER