WINTER WEATHER ADVISORY
Warning Issue Date: 425 PM EST THU DEC 17 2009
...WINTER WEATHER ADVISORY IN EFFECT FROM NOON FRIDAY TO 7 PM EST
SATURDAY...
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A WINTER
WEATHER ADVISORY FOR A WINTRY MIX...WHICH IS IN EFFECT FROM NOON
FRIDAY TO 7 PM EST SATURDAY. THE WINTER STORM WATCH IS NO LONGER
IN EFFECT.
BASIS...AN AREA OF LOW PRESSURE IS EXPECTED TO DEVELOP OVER THE
GULF OF MEXICO TONIGHT... THEN TRACK NORTHEAST ALONG THE CAROLINA
COAST FRIDAY NIGHT THROUGH SATURDAY.
PRECIPITATION TYPES AND ACCUMULATION...SNOW AND SLEET ACCUMULATIONS
OF 1 TO 2 INCHES ARE POSSIBLE...WITH AN ADDITIONAL COATING OF ICE
FROM FREEZING RAIN ALSO POSSIBLE. WITH THE STORM SYSTEM STILL IN
THE INITIAL STAGES OF DEVELOPMENT...THE TRACK OF THE LOW PRESSURE
SYSTEM REMAINS UNCERTAIN. THE SMALLEST DEVIATION EAST OR WEST FROM
THE CURRENT FORECAST TRACK...COULD RESULT IN HEAVIER OR LESSER
AMOUNTS OF SNOW OR ICE ACROSS THE ADVISORY AREA.
TIMING AND DURATION...PRECIPITATION WILL BEGIN AS SNOW ACROSS
THE NORTHWEST AND CENTRAL PIEDMONT...INCLUDING THE TRIANGLE REGION
FRIDAY AFTERNOON. THE PRECIPITATION MAY BECOME MIXTURE OF
SLEET...FREEZING RAIN...OR RAIN FRIDAY NIGHT...BEFORE ENDING
AS A RAIN OR SNOW MIX SATURDAY EVENING.
IMPACTS...TRAVELING WILL BECOME TREACHEROUS ACROSS THE ADVISORY AREA
FRIDAY EVENING THROUGH THE DAY ON SATURDAY...WITH SLICK ICY SPOTS
LIKELY TO DEVELOP ON ELEVATED SURFACES...INCLUDING BRIDGES AND
OVERPASSES. SOME SCATTERED POWER OUTAGES ARE POSSIBLE DUE TO THE
COMBINATION OF FREEZING RAIN AND STRONG WINDS OF 20 TO 30 MPH.
$$
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