HAZARDOUS WEATHER OUTLOOK
Issue Date: 516 AM MST SUN DEC 20 2009
Expiration: 530 AM MST MON DEC 21 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
MONTANA...SOUTH CENTRAL MONTANA...SOUTHEAST MONTANA AND NORTH
CENTRAL WYOMING.
.DAY ONE...TODAY AND TONIGHT
A MIX OF RAIN SNOW AND LOCALIZED FREEZING RAIN IS EXPECTED ACROSS
THE REGION TODAY AND TONIGHT. THE MOST LIKELY PLACE FOR ISOLATED
FREEZING RAIN WILL BE ACROSS SOUTHEAST MONTANA ESPECIALLY ALONG
THE LOWER ELEVATIONS OF THE YELLOWSTONE...POWDER AND TONGUE
RIVERS.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY
WINTER WEATHER WILL RETURN TO THE AREA ON TUESDAY NIGHT AS COLD
AIR SURGES INTO THE AREA FROM THE NORTHWEST. THIS AIRMASS WILL
COMBINE WITH A PAIR OF STORM SYSTEMS MOVING THROUGH THE GREAT
BASIN AND SOUTHERN CANADA TO BRING SNOW TUESDAY NIGHT THROUGH
THURSDAY. THE ARRIVAL OF THE COLD AIR AND PRECIPITATION ON TUESDAY
NIGHT WILL COMBINE WITH RELATIVELY WARM ROADS TO CAUSE RAPIDLY
DETERIORATING ROADWAYS. SNOWFALL SHOULD CONTINUE ON WEDNESDAY AND
THIS WILL MAINTAIN CHALLENGING DRIVING CONDITIONS ON A BUSY TRAVEL
DAY. EXPECT FALLING TEMPERATURES ON WEDNESDAY WITH READINGS NEAR
ZERO BY THURSDAY MORNING.
PEOPLE PLANNING HOLIDAY TRAVEL WILL NEED TO STAY INFORMED ON THE
LATEST FORECASTS AND BE PREPARED TO ALLOW EXTRA TIME TO COMPLETE
TRAVEL THIS WEEK.
.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
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