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Product Timestamp: 2003-05-20 15:40 UTC

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FXUS65 KBYZ 201540 AAA
AFDBIL

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
940 AM MDT TUE MAY 20 2003

.SHORT TERM...VALID FOR TDY AND WED...

PREVIOUS FORECAST IN GOOD SHAPE SO NO UPDATE NEEDED. FLOW ALOFT
WAS ZONAL THIS MORNING AND SURFACE HIGH WAS CENTERED OVER PLAINS
STATES. SOME CIRRUS NOTED ON VISIBLE SATELLITE IMAGERY MOVING ACROSS
MT. HIGH LEVEL MOISTURE WILL INCREASE OVER THE REGION THIS AFTERNOON
RESULTING IN PARTLY CLOUDY SKIES AS MOISTURE OVER PACIFIC NW MOVES E.
850 MB TEMPS PROGGED TO RISE TO NEAR +12 DEG C BY 00Z. MIXING THIS AIR
DOWN TO THE SURFACE YIELDED UPPER 60S FOR AFTERNOON HIGHS BUT SOME
CLOUD COVER WILL KEEP TEMPS IN MID 60S. REMAINDER OF SHORT TERM WILL
BE DRY WITH A WARMING TREND AS ZONAL FLOW GIVES WAY TO UPPER
RIDGING. ARTHUR

.LONG TERM...VALID FOR THU...FRI...SAT...SUN...MON...

EXTENDED MODELS CONTINUE TO BE IN GOOD AGREEMENT FOR MAJOR WARMUP
THROUGH THE WEEKEND. MODELS CONTINUE TO AMPLIFY UPPER RIDGE WITH PEAK ON
SUNDAY. 700 MB TEMPERATURE RIDGE PROGGED OVER WESTERN ZONES WITH
TEMPERATURES TO +13C. THIS WOULD SUPPORT TEMPERATURES REACHING NEAR
RECORD LEVELS IN THE UPPER 80S BY SATURDAY. WILL BE RAISING
TEMPERATURES MOST DAYS IN THE EXTENDED TO OR NEAR RECORD LEVELS. TEMP
AXIS CHANGES VERY LITTLE ON SUNDAY...SO EXPECT HEAT TO CONTINUE INTO
SUNDAY. MODELS FORECASTING POSSIBLE KNOCKING DOWN OF RIDGE ON MONDAY
WITH CHANCE OF THUNDERSTORMS IN THE GRIDS LOOKING OK...WITH COOLER
TEMPERATURES. RASCH


    TDY WED     THU     FRI     SAT     SUN     MON
-------------------------------------------------------
BIL 065 043/072 046/076 049/084 053/087 054/087 053/081
    0/B 00/B    00/B    00/U    00/U    00/B    03/T
LVM 063 038/069 038/078 041/083 046/086 048/086 047/077
    0/B 00/B    00/B    00/U    00/U    00/B    03/T
HDN 066 042/073 046/075 048/082 052/088 053/088 052/081
    0/B 00/B    00/B    00/U    00/U    00/B    03/T
MLS 066 042/072 046/075 048/083 053/086 052/086 051/080
    0/B 00/B    00/B    00/U    00/U    00/B    03/T
4BQ 066 041/073 044/075 045/084 049/086 050/086 050/081
    0/B 00/B    00/B    00/U    00/U    00/B    03/T
BHK 064 039/069 043/073 046/080 051/082 050/082 050/080
    0/B 00/B    00/B    00/U    00/U    00/B    03/T
SHR 065 039/070 040/075 046/084 049/085 051/085 051/081
    0/B 00/B    00/B    00/U    00/U    00/B    03/T


.BYZ...
MT...NONE.
WY...NONE.
$$