Severe Storm Outlook Narrative (AC)
Issued by NWS

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000 ACUS11 KWNS 271524 SWOMCD SPC MCD 271524 MEZ000-MAZ000-NHZ000-RIZ000-272030- MESOSCALE DISCUSSION 0046 NWS STORM PREDICTION CENTER NORMAN OK 0924 AM CST TUE JAN 27 2015 AREAS AFFECTED...RI...ERN MA...ERN NH...AND MUCH OF MAINE CONCERNING...HEAVY SNOW VALID 271524Z - 272030Z SUMMARY...HEAVY SNOWFALL WITH RATES IN EXCESS OF 1 INCH/HR WILL CONTINUE THROUGH AT LEAST 20Z ACROSS RI...ERN MA...ERN NH...AND MUCH OF MAINE. THE AXIS OF HEAVIEST SNOWFALL WILL SHIFT NWD WITH TIME. DISCUSSION...SFC MESOANALYSIS AT 15Z INDICATES A LOW SE OF MA WITH A MINIMUM CENTRAL PRESSURE OF 978 MB...MOVING NEWD WITH TIME. A CLOSED UPPER LOW WITH AN ASSOCIATED VORTICITY MAXIMUM IS LOCATED JUST OFFSHORE THE RI/MA COAST...ALSO MOVING NEWD. MID-LEVEL FRONTOGENESIS AND DEEP ASCENT ASSOCIATED WITH THE UPPER LOW ARE THE PRIMARY FEATURES RESPONSIBLE FOR THE ONGOING N/S ORIENTED BAND OF HEAVY SNOW ACROSS THE DISCUSSION AREA. LATEST SFC OBSERVATIONS SHOW BLIZZARD CONDITIONS CONTINUING ALONG THE COAST FROM MAINE TO MA WITH A STRONG PRESSURE GRADIENT BETWEEN THE SFC LOW OFF THE MA COAST AND HIGH PRESSURE ACROSS THE ERN CANADIAN PROVINCES. AS BOTH THE SFC AND UPPER LOW MOVE NEWD THROUGH 20Z...THE AXIS OF HEAVIEST SNOWFALL WILL CONTINUE TO SHIFT NWD AWAY FROM RI AND ERN MA...AND TOWARDS ERN NH AND MUCH OF CNTRL/ERN MAINE. SNOWFALL RATES SHOULD BEGIN TO DECREASE AFTER 20Z AS THE SFC LOW FILLS UNDERNEATH THE UPPER LOW CIRCULATION...AND MID-LEVEL FRONTOGENESIS SHIFTS NWD AND AWAY FROM THE DISCUSSION AREA. ..GLEASON/PETERS.. 01/27/2015 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CAR...GYX...BOX... LAT...LON 41397175 42567179 44637103 46056883 46566782 45646757 45146706 44676710 44426739 44116834 43776965 42947057 41357043 41397175

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