HAZARDOUS WEATHER OUTLOOK
Issue Date: 400 AM MST THU DEC 31 2009
Expiration: 400 AM MST FRI JAN 01 2010
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.
.DAY ONE...TODAY AND TONIGHT
A WIND CHILL ADVISORY IS IN EFFECT FOR AREAS NEAR THE CANADIAN
BORDER THROUGH 10 AM FOR HAZARDOUS WIND CHILLS OF 15 TO 30 BELOW.
LIGHT SNOW IS EXPECTED ACROSS PARTS OF THE AREA. ACCUMULATIONS ARE
EXPECTED TO BE LIGHT...WELL UNDER AN INCH.
AS SURFACE HIGH PRESSURE MOVES INTO THE DAKOTAS TONIGHT IT WILL
CREATE A TIGHTENING PRESSURE GRADIENT ACROSS THE AREA RESULTING IN
INCREASING EAST WIND. WITH AN ARCTIC AIR MASS IN PLACE THIS WIND
WILL CREATE DANGEROUS WIND CHILLS OF 25 TO 40 BELOW ZERO FROM
LATER TONIGHT INTO OR THROUGH SATURDAY. A WIND CHILL ADVISORY OR
WARNING WILL LIKELY BE NEEDED FOR AT LEAST PARTS OF NORTHEAST
MONTANA LATER TONIGHT.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
A WIND CHILL ADVISORY OR WARNING WILL LIKELY BE NEEDED FOR AT
LEAST PARTS OF NORTHEAST MONTANA FRIDAY THROUGH MUCH OF SATURDAY
DUE TO A TIGHT PRESSURE GRADIENT AND COLD ARCTIC AIR IN PLACE.
ACCUMULATING SNOW AND AREAS OF LIGHT FREEZING RAIN ARE ALSO
POSSIBLE FRIDAY NIGHT AND SATURDAY AS A WARM FRONT MOVES THROUGH
NORTHEAST MONTANA FROM SOUTHWEST TO NORTHEAST. THIS COULD POSSIBLY
REQUIRE A WINTER WEATHER ADVISORY FOR AT LEAST PARTS OF THE AREA
DUE TO ICE...SNOW AMOUNTS AND BLOWING SNOW.
OTHERWISE NO OTHER HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
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