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

Keith Reedy
keithreedy@xxxxxxxxxxxx



Begin forwarded message:

> From: National Weather Service <nws.noaa@xxxxxxxxxxxxxxxxxxxxxxx>
> Subject: NOAA's National Weather Service SPC Mesoscale Discussion Update
> Date: August 8, 2011 6:33:43 PM EDT
> To: keithreedy@xxxxxxxxxxxx
> Reply-To: National Weather Service <nws.noaa@xxxxxxxxxxxxxxxxxxxxxxx>
> 
> You are subscribed to SPC Mesoscale Discussion for NOAA's National Weather 
> Service.
> 
> 
> SPC MD 1904
> 08/08/2011 06:24 PM EDT
> 
> MD 1904 CONCERNING SEVERE POTENTIAL...SEVERE THUNDERSTORM WATCH LIKELY FOR IL 
> 
> 
> MESOSCALE DISCUSSION 1904
> NWS STORM PREDICTION CENTER NORMAN OK
> 0523 PM CDT MON AUG 08 2011
> 
> AREAS AFFECTED...IL
> 
> CONCERNING...SEVERE POTENTIAL...SEVERE THUNDERSTORM WATCH LIKELY 
> 
> VALID 082223Z - 082330Z
> 
> DAMAGING WIND THREAT APPEARS TO BE INCREASING WITH DEVELOPING TSTM
> CLUSTER INVOF MESOLOW/COLD FRONT IN W-CNTRL/NWRN IL. THE PROBABILITY
> OF A WW ISSUANCE BY 00Z IS 60 PERCENT.
> 
> 22Z SURFACE ANALYSIS PLACED A MESOLOW AROUND 30 SE MLI WITH A COLD
> FRONT EXTENDING SWWD INTO NRN MO AND AN ARCING BOUNDARY SINKING
> SLOWLY SWD THROUGH STARK TO PUTNAM COUNTIES. THE MOST INTENSE TSTM
> ACTIVITY HAS GENERALLY REMAINED ALONG AND N OF THIS OUTFLOW
> BOUNDARY...BUT CELLS HAVE RECENTLY INCREASED FARTHER SW ALONG THE
> COLD FRONT. A WEDGE OF FULL INSOLATION BETWEEN THIS RENEWED
> DEVELOPMENT AND EARLIER CONVECTIVE DEBRIS HAS ALLOWED TEMPERATURES
> TO SURGE INTO THE 80S ACROSS PORTIONS OF CNTRL IL. GIVEN THIS
> INCREASING DESTABILIZATION AMIDST 30-40 KT EFFECTIVE
> SHEAR...POTENTIAL FOR UPSCALE TSTM GROWTH APPEARS PROBABLE WITH AN
> ATTENDANT THREAT FOR DAMAGING WINDS.
> 
> ..GRAMS.. 08/08/2011
> 
> ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
> 
> ATTN...WFO...LOT...ILX...LSX...DVN...
> 
> LAT...LON   40969039 41418963 41538884 41338826 40588758 40348756
>             39718837 39408959 39699056 40129063 40219061 40969039 
> 
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