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March 13-14 Storm Nowcasting/Obs


nj2va

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MD 291 graphic
   Mesoscale Discussion 0291
   NWS Storm Prediction Center Norman OK
   0901 PM CDT Mon Mar 13 2017

   Areas affected...Northern VA...Central MD...Southeast PA...Western
   NJ

   Concerning...Heavy snow 

   Valid 140201Z - 140600Z

   SUMMARY...Moderate to heavy snow will blossom across this region
   during the evening hours, with rates of over 1"/hour possible
   through 06z.

   DISCUSSION...Recent radar loop indicates that precipitation is
   rapidly increasing in areal coverage and intensity across parts of
   the Delmarva region.  At 01z, snow is being reported along and north
   of a line from NYG - NAK - PTW, while rain is being reported to the
   south.  This rain/snow line will likely move only slightly northward
   before 06z, suggesting that the DC and Baltimore metro areas will
   remain in mostly frozen precipitation.  However, several recent
   model runs suggest that this southern fringe of the snow zone may
   begin to mix with/change to sleet or freezing rain around midnight
   as profiles begin to warm in the 900-700mb layer.  Nevertheless, it
   appears likely that a corridor of locally heavy snowfall rates will
   develop from far northern VA, northeastward into central MD and
   southeast PA through 06z.  Warm surface temperatures may result in
   substantial melting of snow initially, but higher rates will likely
   overcome the warm ground and begin to accumulate soon.

   ..Hart.. 03/14/2017


   ATTN...WFO...PHI...BGM...CTP...LWX...

   LAT...LON   39707845 41147547 40927476 39757538 38657730 38567834
               39047876 39707845 
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4 minutes ago, ThePhotoGuy said:
MD 291 graphic

   Mesoscale Discussion 0291
   NWS Storm Prediction Center Norman OK
   0901 PM CDT Mon Mar 13 2017

   Areas affected...Northern VA...Central MD...Southeast PA...Western
   NJ

   Concerning...Heavy snow 

   Valid 140201Z - 140600Z

   SUMMARY...Moderate to heavy snow will blossom across this region
   during the evening hours, with rates of over 1"/hour possible
   through 06z.

   DISCUSSION...Recent radar loop indicates that precipitation is
   rapidly increasing in areal coverage and intensity across parts of
   the Delmarva region.  At 01z, snow is being reported along and north
   of a line from NYG - NAK - PTW, while rain is being reported to the
   south.  This rain/snow line will likely move only slightly northward
   before 06z, suggesting that the DC and Baltimore metro areas will
   remain in mostly frozen precipitation.  However, several recent
   model runs suggest that this southern fringe of the snow zone may
   begin to mix with/change to sleet or freezing rain around midnight
   as profiles begin to warm in the 900-700mb layer.  Nevertheless, it
   appears likely that a corridor of locally heavy snowfall rates will
   develop from far northern VA, northeastward into central MD and
   southeast PA through 06z.  Warm surface temperatures may result in
   substantial melting of snow initially, but higher rates will likely
   overcome the warm ground and begin to accumulate soon.

   ..Hart.. 03/14/2017


   ATTN...WFO...PHI...BGM...CTP...LWX...

   LAT...LON   39707845 41147547 40927476 39757538 38657730 38567834
               39047876 39707845 

I like this very, very much

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