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Mesoscale Discussion 1144
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   MESOSCALE DISCUSSION 1144
   NWS STORM PREDICTION CENTER NORMAN OK
   0555 PM CDT TUE JUN 23 2015

   AREAS AFFECTED...RI...MA...ME...NH

   CONCERNING...TORNADO WATCH 345...

   VALID 232255Z - 240030Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 345 CONTINUES.

   SUMMARY...ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO
   POSE A THREAT FOR HAIL AND POSSIBLY A TORNADO ACROSS PARTS OF MA
   NORTH INTO NH AND EXTREME WESTERN MAINE IN THE NEXT 1-2 HOURS. THIS
   POTENTIAL WILL LIKELY DECREASE QUICKLY AFTER SUNSET.

   DISCUSSION...A COLD FRONT FROM THE UPPER CT RIVER VALLEY SSW TO NWRN
   MA PROVIDES THE WRN LIMIT OF TSTM POTENTIAL ACROSS NRN NEW ENGLAND
   EARLY THIS EVENING. THE EASTERN LIMIT COMES IN THE FORM OF A WELL
   DEFINED WARM FRONT EAST OF THE NH/ME BORDER. A NARROW CORRIDOR OF
   MODEST INSTABILITY REMAINS BETWEEN THESE TWO SFC FEATURES WHERE
   LATEST OBJECTIVE DATA INDICATED POCKETS OF EFFECTIVE SRH ON THE
   ORDER OF 100-200 M2/S2. LIFT ALONG THE EWD ADVANCING COLD FRONT WILL
   CONTINUE TO PROMOTE TSTMS GIVEN WEAK INHIBITION...STRONG BACKGROUND
   ASCENT...AND SUFFICIENT INSTABILITY. WHILE A MORE LINEAR CONVECTIVE
   MODE APPEARS TO BE UNDERWAY ALONG THE COLD FRONT IN NRN NH...STORMS
   FURTHER SOUTH CONTINUE TO SHOW DISCRETE CHARACTER AND REMAIN CAPABLE
   OF PRODUCING MARGINALLY SEVERE HAIL AND POSSIBLY A WEAK/BRIEF
   TORNADO. CELLS CROSSING THE WARM FRONT IN WRN ME COULD ALSO POSE A
   BRIEF TORNADO THREAT GIVEN LOCALLY ENHANCED/STRENGTHENED DIRECTIONAL
   SHEAR ON THE BOUNDARY...PRIOR TO TRACKING INTO A MORE STABLE AIRMASS
   WITH ERN EXTENT.

   ..CARBIN/DARROW.. 06/23/2015


   ATTN...WFO...GYX...BOX...BTV...OKX...ALY...

   LAT...LON   41097213 41567294 41637298 41657298 41777301 41807301
               42097306 42097306 42107306 42387306 42727305 43437249
               43827220 43917218 44157197 44317184 44667166 45057151
               45197142 45297089 44016996 43446980 42326986 42086985
               41646996 41357009 41117025 41287061 41217084 41127157
               41097213 

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