MESO: Mesoscale Discussion 2132

ACUS11 KWNS 070844
SWOMCD
SPC MCD 070844
PAZ000-071445-

MESOSCALE DISCUSSION 2132
NWS STORM PREDICTION CENTER NORMAN OK
0244 AM CST FRI DEC 07 2012

AREAS AFFECTED...CNTRL PA

CONCERNING...FREEZING RAIN

VALID 070844Z - 071445Z

SUMMARY...AREAS OF LIGHT FREEZING RAIN ARE EXPECTED EARLY THIS
MORNING...ENDING FROM SW TO NE AS TEMPERATURES WARM...AND CHANGING
TO ALL RAIN AFTER 15Z.

DISCUSSION...A COLD SURFACE RIDGE IS IN PLACE ACROSS THE NERN STATES
WITH TEMPERATURES IN THE 20S F. SWLY FLOW OFF THE SURFACE IS HELPING
TO ENHANCE ISENTROPIC LIFT ALONG A WARM FRONT...WITH WIDESPREAD
SHOWERS ACROSS OH INTO WRN PA. WITH SURFACE WET BULB TEMPERATURES
WELL BELOW 32 F...INITIAL PRECIPITATION SHOULD BE FREEZING RAIN
ACROSS CNTRL AND NRN PA. MODELS INDICATE A FEW HUNDREDTHS PER HOUR
WILL BE POSSIBLE FOR SEVERAL HOURS...BEFORE WARM ADVECTION BRING
TEMPERATURES ABOVE FREEZING. UPSTREAM SURFACE OBSERVATIONS ALSO
INDICATE HOURLY AMOUNTS GENERALLY NEAR 0.05".

..JEWELL.. 12/07/2012

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...BGM...CTP...

LAT...LON 41967685 41767620 41407596 40827604 40427655 40097709
39937749 40347795 40857846 41277862 41727843 41937785
41967685

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