[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 201721
SWOMCD
SPC MCD 201721 
OHZ000-INZ000-ILZ000-201915-

MESOSCALE DISCUSSION 0606
NWS STORM PREDICTION CENTER NORMAN OK
1221 PM CDT WED APR 20 2005

AREAS AFFECTED...ERN IL...NRN/CNTRL IND...NWRN OH

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 201721Z - 201915Z

...THUNDERSTORMS WILL SOON DEVELOP FROM PORTIONS OF NERN IL INTO
NWRN OH.  SEVERE THUNDERSTORM WATCH MAY BE REQUIRED...

LATEST VIS SATELLITE IMAGERY STRONGLY IMPLIES WHAT LITTLE INHIBITION
WAS HOLDING BACK BOUNDARY LAYER CONVECTION IS ALL BUT GONE...PER
RECENT RAPID CU FIELD EXPANSION.  DIAGNOSTIC DATA SUPPORTS THIS WITH
STEEP LOW LEVEL LAPSE RATES BENEATH MODEST DEEP LAYER WLY FLOW.  OF
PARTICULAR INTEREST IS THE ENHANCED CONVERGENCE ALONG SWD-MOVING
MODIFIED LAKE BREEZE/COLD FRONT.  THIS BOUNDARY SHOULD ENHANCE
CONVERGENCE AND THUNDERSTORM THREAT WITHIN A MODERATELY UNSTABLE
AIRMASS.  MULTICELL UPDRAFTS CAPABLE OF PRODUCING GUSTY WINDS AND
HAIL WILL BE THE PRIMARY THREATS.

..DARROW.. 04/20/2005

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...CLE...ILN...IWX...IND...LOT...ILX...

40968849 41108578 41398320 40818256 40218382 39668903 

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