[MCD] SWOMCD

Mon Nov 28 07:43:36 UTC 2005

ACUS11 KWNS 280736
SWOMCD
SPC MCD 280735 
MEZ000-NHZ000-281130-

MESOSCALE DISCUSSION 2488
NWS STORM PREDICTION CENTER NORMAN OK
0135 AM CST MON NOV 28 2005

AREAS AFFECTED...MUCH OF MAINE

CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION 

VALID 280735Z - 281130Z

PROLONGED PERIOD OF FREEZING RAIN WITH RATES AT OR EXCEEDING 0.05
INCHES PER 3 HR EXPECTED TO SPREAD ENEWD ACROSS SWRN AND SRN ME...
INLAND OF THE IMMEDIATE COAST...THROUGH AT LEAST 12Z.

PRECIPITATION OVER CENTRAL AND NRN ME EXPECTED TO START AS A MIXTURE
OF SNOW/SLEET...THEN CHANGING TO FREEZING RAIN ACROSS MAINLY CENTRAL
 AND NWRN ME BY 10-12Z.  FREEZING RAIN RATES SHOULD BE AROUND 0.05
INCHES PER 3 HR TIME FRAME.

07Z SURFACE ANALYSIS INDICATED SUB-FREEZING TEMPERATURES ACROSS MUCH
OF ME...EXCEPT ALONG THE IMMEDIATE COASTAL AREAS.  05Z RUC SHOWED
THIS SUB-FREEZING AIR MASS WILL REMAIN ENTRENCHED ACROSS MOST OF THE
AREA OF CONCERN THROUGH 12-14Z...AS STRONG WAA IN THE LOWER
TROPOSPHERE MAINTAINS A WARM LAYER ATOP THE COLD SURFACE
TEMPERATURES.  05Z RUC POINT FORECAST SOUNDINGS SUGGESTED THE
INITIAL DRY AIR LOCATED IN THE LOW-MID LEVELS PER 00Z OBSERVED
SOUNDINGS WILL SATURATE OVERNIGHT...GIVEN MOISTENING PROCESSES
EXPECTED THROUGH UVVS AND ADVECTION.  THERMODYNAMIC PROFILES OVER
SRN ME FROM OXFORD TO YORK COUNTIES SEWD TO INLAND PORTIONS OF
DOWNEAST ME SUPPORT FREEZING RAIN.  FARTHER N INTO CENTRAL AND NRN
ME...THE AIR MASS SHOULD BE SLOWER TO SATURATE WHICH SUGGESTS
PRECIPITATION WILL LIKELY BEGIN AS LIGHT SNOW AND/OR SNOW/SLEET MIX.
 MIXED PRECIPITATION OVER CENTRAL/NWRN ME IS EXPECTED TO CHANGE TO
FREEZING RAIN BY 12-14Z.

..PETERS.. 11/28/2005

...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...BETWEEN 00-01 UTC...06-07 UTC...12-13 UTC...
AND 18-19 UTC FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.

ATTN...WFO...CAR...GYX...

45196741 44676858 44186982 43997030 44137083 44687103
45317104 46277023 47216966 47516916 47416817 47046759 