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Mesoscale Discussion 42
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   MESOSCALE DISCUSSION 0042
   NWS STORM PREDICTION CENTER NORMAN OK
   1053 AM CST SAT JAN 24 2015

   AREAS AFFECTED...COAST OF MAINE

   CONCERNING...HEAVY SNOW 

   VALID 241653Z - 242300Z

   SUMMARY...HEAVY SNOW IS EXPECTED TO DEVELOP ALONG THE COAST OF MAINE
   THIS AFTERNOON. SNOWFALL RATES SHOULD REACH 1 INCH PER HOUR IS SOME
   SPOTS WITHIN THE MCD AREA.

   DISCUSSION...THE LATEST SFC ANALYSIS SHOWS A 990 MB LOW ABOUT 125
   STATUTE MILES TO THE SOUTHEAST OF LONG ISLAND. A 70 TO 80 KT
   LOW-LEVEL JET IS ANALYZED OVER THE GULF STREAM WITH THE EXIT REGION
   OF A MID-LEVEL JET LOCATED NORTH OF CAPE COD. AS THE LEFT EXIT
   REGION OF THE MID-LEVEL JET OVERSPREADS THE COAST OF MAINE OVER THE
   NEXT FEW HOURS...LIFT WILL BECOME MARKEDLY ENHANCED. IN
   ADDITION...FORECAST SOUNDINGS ALONG THE COAST OF MAINE THIS
   AFTERNOON SHOW VEERING WINDS WITH HEIGHT AND CONSIDERABLE SHEAR IN
   THE 850 MB TO 500 MB LAYER. THIS IS INDICATIVE OF STRONG ISENTROPIC
   LIFT WHICH WILL BE FAVORABLE FOR THE DEVELOPMENT OF HEAVY SNOW
   BANDS. MODERATE SNOW IS ALREADY ONGOING NEAR PORTLAND MAINE. THIS
   SNOW BAND SHOULD GRADUALLY INTENSIFY AS IT EXPANDS NEWD ALONG THE
   COAST OVER THE NEXT FEW HOURS. SNOWFALL RATES COULD REACH 1 INCH PER
   HOUR WITHIN THE HEAVIEST PART OF THE BAND. AREAS ALONG THE COAST TO
   THE EAST AND NORTHEAST OF AUGUSTA MAINE SHOULD BE AFFECTED AFTER
   18Z.

   ..BROYLES/CORFIDI.. 01/24/2015


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

   LAT...LON   44366773 43706963 43267040 43247082 43707093 44287035
               45306729 44786697 44366773 

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Page last modified: January 24, 2015
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