[spotters-illianaskywarn] Fwd: NOAA's National Weather Service SPC Mesoscale Discussion Update

  • From: Keith Reedy <wa9dro@xxxxxxxxx>
  • To: spotters-illianaskywarn@xxxxxxxxxxxxx
  • Date: Sun, 27 Jun 2010 13:39:53 -0400


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Begin forwarded message:

> From: National Weather Service <nws.noaa@xxxxxxxxxxxxxxxxxxxxxxx>
> Date: June 27, 2010 1:03:03 PM EDT
> To: keithreedy@xxxxxxxxxxxx
> Subject: NOAA's National Weather Service SPC Mesoscale Discussion Update
> 
> SPC MD 1145
> Sun, 27 Jun 2010 11:53:06 -0500
> 
> 
> 
> 
> MESOSCALE DISCUSSION 1145
> NWS STORM PREDICTION CENTER NORMAN OK
> 1152 AM CDT SUN JUN 27 2010
> 
> AREAS AFFECTED...PORTIONS SRN OH...CENTRAL/ERN KY...WRN WV...SERN
> INDIANA.
> 
> CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
> 
> VALID 271652Z - 271915Z
> 
> SMALL CLUSTERS OF TSTMS MAY POSE SPORADIC DAMAGING WIND THREAT
> ACROSS DISCUSSION AREA...WITH A FEW BOW FORMATIONS POSSIBLE. 
> COVERAGE FCST TO BE MORE ISOLATED TO WIDELY SCATTERED THAN FARTHER N
> ACROSS WW 423...WHERE FOCI FOR ORGANIZED SVR ARE STRONGER ALONG WITH
> MID-UPPER LEVEL SUPPORT.
> 
> TSTMS ARE INCREASING IN COVERAGE AND INTENSITY IN MULTICELL FORM
> OVER E-CENTRAL KY...WITH WITH SOMEWHAT ORGANIZED CLUSTER APCHG CVG
> AREA AT APPROXIMATELY 30-35 KT.  FOREGOING AIR MASS IS DESTABILIZING
> FAVORABLY AND SHOULD SUPPORT ADDITIONAL DEVELOPMENT AS WELL. 
> DEEP-LAYER WINDS AND VERTICAL SHEAR EACH WEAKEN CONSIDERABLY WITH
> SWD EXTENT...AND WILL CONTINUE TO DO SO...ALTHOUGH SOME ENHANCEMENT
> TO AMBIENT/GRADIENT WINDS ALOFT IS POSSIBLE AS UPPER MS VALLEY
> SHORTWAVE TROUGH AND LOW-MIDLEVEL MCV OVER LM EACH MOVE EWD. 
> FORWARD-PROPAGATIONAL PROCESSES THEREFORE SHOULD BE DRIVEN LARGELY
> BY LOCALIZED/UPSCALE GROWTH OF MULTICELLULAR COLD POOLS.  THOSE WILL
> FORCE ASCENT OF DIABATICALLY WARMING PRECONVECTIVE AIR MASS
> CHARACTERIZED BY 70S F SFC DEW POINTS...MINIMAL CINH...AND MLCAPE
> 2000-3500 J/KG.
> 
> ..EDWARDS.. 06/27/2010
> 
> ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
> 
> ATTN...WFO...PBZ...RLX...CLE...JKL...ILN...LMK...IND...
> 
> LAT...LON   37048498 38028535 38988614 39758581 40508243 40288070
>             39028088 38268146 37498252 37048498 
> 
> Read more
> 
> 
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