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Mesoscale Discussion 405
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   MESOSCALE DISCUSSION 0405
   NWS STORM PREDICTION CENTER NORMAN OK
   0345 PM CDT FRI APR 25 2014

   AREAS AFFECTED...PORTIONS OF CNTRL/ERN NC AND SRN VA

   CONCERNING...TORNADO WATCH 91...

   VALID 252045Z - 252215Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 91 CONTINUES.

   SUMMARY...THE RISK FOR TORNADOES...DAMAGING WINDS,..AND LARGE HAIL
   CONTINUES ACROSS TORNADO WATCH 91.

   DISCUSSION...THE GREATEST TORNADO RISK WILL AFFECT PARTS OF THE NRN
   COASTAL PLAIN OF NC AND ADJACENT PARTS OF THE TIDEWATER OF VA DURING
   THE NEXT COUPLE OF HOURS...AND ONE OR TWO STRONG TORNADOES CANNOT BE
   RULED OUT. VIS IMAGERY DEPICTS CONFLUENCE OF BOUNDARY-LAYER CLOUD
   STREETS EXTENDING NWD INTO A LARGER MASS OF SEMI-DISCRETE SUPERCELLS
   ACROSS CNTRL/N-CNTRL NC...HIGHLIGHTING MODERATELY UNSTABLE INFLOW
   INGESTED INTO THE ONGOING STORMS. MHX AND AKQ VWPS SAMPLE
   LONG/CURVED LOW-LEVEL HODOGRAPHS SUPPORTING 150-250 0-1-KM SRH...AND
   LOW-LEVEL SRH SHOULD INCREASE FURTHER AS TROPOSPHERIC FLOW FIELDS
   RESPOND AHEAD OF AN APPROACHING MID-LEVEL VORT MAX...REINFORCING THE
   TORNADO RISK AS STORMS SPREAD E. ELSEWHERE...SFC OBS REVEAL 2-HRLY
   PRESSURE FALLS AROUND 2.0-3.5 MB...REFLECTING THE STRENGTHENING DEEP
   ASCENT THAT WILL PROMPT AN INCREASE IN CONVECTIVE COVERAGE OVER THE
   PIEDMONT DURING THE NEXT FEW HOURS WITH THE RISK FOR SVR STORMS.

   ..COHEN.. 04/25/2014


   ATTN...WFO...AKQ...MHX...RAH...ILM...RNK...GSP...

   LAT...LON   35258049 36737969 37597757 37287621 36517563 35277563
               34687663 34727918 35258049 

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Page last modified: April 25, 2014
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