SWOMCD
SPC MCD 280018
MEZ000-280215-
MESOSCALE DISCUSSION 2542
NWS STORM PREDICTION CENTER NORMAN OK
0618 PM CST SAT DEC 27 2008
AREAS AFFECTED...NRN MAINE
CONCERNING...FREEZING RAIN
VALID 280018Z - 280215Z
FREEZING RAIN RATES 0.02 TO 0.05 INCH/HR ARE POSSIBLE FROM 00Z-06Z
BEFORE TRANSITIONING TO RAIN FROM S TO N DURING THE PERIOD.
RADAR MOSAIC SHOWS A BROKEN SHIELD OF SHOWERS GENERALLY MOVING EWD
ACROSS PARTS OF NRN VT-NH AND SRN QUEBEC. THIS AREA OF
PRECIPITATION WILL LIKELY MOVE EWD INTO PARTS OF NRN MAINE DURING
THE NEXT FEW HOURS AS LOW LVL WAA/MOISTURE FLUX --GPS PRECIPITABLE
H20 NEAR 1 INCH-- IS MAINTAINED ACROSS THE REGION. 00Z CAR RAOB
SHOWS AN 850-700MB LAYER AOA 0 DEG C WITH A SHALLOW SUB-FREEZING
LAYER BELOW. NAMKF/RUC/GFS FORECAST SOUNDINGS MAINTAIN THIS THERMAL
STRATIFICATION THROUGH MOST OF THE PERIOD WITH THE NEAR SURFACE COLD
WEDGE ERODING NWD OF THE REGION BY 06Z. LATEST SHORT TERM
DETERMINISTIC GUIDANCE INDICATES RATES WILL GENERALLY BE
MODEST...WITH 0.02 INCH/HR RATES LIKELY WITH LOCALIZED RATES
APPROACHING 0.05 INCH/HR.
..SMITH.. 12/28/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
ATTN...WFO...CAR...
LAT...LON 46466777 45766837 45646900 46026966 46047023 47456917
47196902 47316818 47046778 46466777
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