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FXUS01 KWBC 092055
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
454 PM EDT THU OCT 09 2008
VALID 00Z FRI OCT 10 2008 - 12Z SAT OCT 11 2008
ALL ATTENTION IS ALONG THE WESTERN THIRD OF THE UNITED STATES
WHERE A SIGNIFICANT UPPER-LEVEL LOW WILL AFFECT THE REGION WELL
INTO THE WEEKEND. THE BIGGEST IMPACTS WILL BE IN THE FORM OF VERY
COOL TEMPERATURES...WIDESPREAD SNOWFALL...AND GUSTY WINDS. A
SURFACE FRONTAL BOUNDARY DIVING SOUTHWARD THROUGH THE HIGH TERRAIN
WILL DROP TEMPERATURES SIGNIFICANTLY UPON PASSAGE. DAYTIME HIGHS
MAY FALL IN UPWARD OF 30 DEGREES FAHRENHEIT BRINGING A LATE
AUTUMN/EARLY WINTER FEEL TO THE AIR. HIGHS BOTH FRIDAY AND
SATURDAY WILL RESIDE BETWEEN THE MID 30S TO MID 40S ACROSS THE
CENTRAL GREAT BASIN. AS THE FRONT DRIVES FARTHER TO THE
SOUTH...EVEN THE DESERT SOUTHWEST CAN EXPECT CHANGES IN THE
SENSIBLE WEATHER BY THE END OF THE WORK WEEK AND INTO THE EARLY
PART OF THE WEEKEND. LOCATIONS COMMONLY IN THE 90S AND APPROACHING
THE CENTURY MARK WILL BE RESTRICTED TO AFTERNOON HIGHS IN THE 70S.
THE PRECIPITATION EVENT UNDERWAY WILL PRIMARILY BE A SNOW MAKER AS
LIGHT TO MODERATE SNOW WILL FALL ACROSS MUCH OF THE INTERIOR WEST.
INITIALLY...THE SNOW WILL COMMENCE OVER THE NORTHERN ROCKIES AND
STRETCH EASTWARD INTO THE NORTHERN HIGH PLAINS. BY FRIDAY...AS THE
WEATHER SYSTEM DROPS SOUTHWARD...SO WILL THE BANDS OF SNOWFALL
WHICH WILL CROSS INTO THE CENTRAL GREAT BASIN AND THE CENTRAL
ROCKY MOUNTAINS. WHILE MANY AREAS WILL RECEIVE MEASURABLE
SNOWS...THE BEST FOCUS FOR HIGHER AMOUNTS WILL BE ACROSS THE
TETONS OVER WESTERN WYOMING NORTHWARD INTO MUCH OF SOUTHERN
MONTANA. IN RESPONSE TO THE EXPECTED WINTRY WEATHER...NUMEROUS
FORECAST OFFICES ACROSS WYOMING AND MONTANA HAVE ISSUED WINTER
STORM WATCHES AND WINTER WEATHER ADVISORIES THROUGH THE DURATION
OF THIS STORM. FARTHER TO THE SOUTH ACROSS EASTERN ARIZONA AND
WESTERN NEW MEXICO...A SURGE OF MOISTURE IN ADVANCE OF HURRICANE
NORBERT WILL HELP TRIGGER SHOWERS AND THUNDERSTORMS ACROSS THE
REGION BEGINNING FRIDAY AFTERNOON. SOME LOCALLY HEAVIER AMOUNTS
ARE EXPECTED AS THE TERRAIN WILL ENHANCE SOME OF THE RAINBANDS.
ELSEWHERE...A CUT-OFF UPPER LOW CURRENTLY MOVING ACROSS THE
SOUTHEASTERN STATES WILL CONTINUE TO SLOW IN FORWARD SPEED AND
EVENTUALLY STALL JUST OFF THE COASTLINE. CONSEQUENTLY...NUMEROUS
SHOWERS AND THUNDERSTORMS WILL FIRE ACROSS THE SOUTHEAST AND
STRETCH NORTHWARD INTO THE CAROLINAS. THIS SHOULD KEEP THE WEATHER
UNSETTLED INTO THE EARLY PART OF THE UPCOMING WEEKEND.
AN ABUNDANCE OF WARMTH WILL REACH MOST AREAS EAST OF THE PLAINS. A
BUILDING UPPER-LEVEL RIDGE WILL BRING TEMPERATURES WELL INTO THE
70S ON FRIDAY AND EVEN RISING INTO THE LOW TO MID 80S BY SATURDAY.
THIS REMARKABLE WARMTH IS ANOMALOUS IN NATURE AS SUCH TEMPERATURES
ARE EVEN WARMER THAN THAT HITTING THE DESERT SOUTHWEST THIS
WEEKEND.
RUBIN-OSTER
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