[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 212321
SWOMCD
SPC MCD 212320 
OHZ000-MIZ000-INZ000-ILZ000-212345-

MESOSCALE DISCUSSION 1756
NWS STORM PREDICTION CENTER NORMAN OK
0620 PM CDT WED JUL 21 2004

AREAS AFFECTED...PORTIONS CENTRAL-NRN IL/CENTRAL-NRN IND/CENTRAL-SRN
LOWER MI/NWRN OH

CONCERNING...SEVERE THUNDERSTORM WATCH 663...

VALID 212320Z - 212345Z

NEW WW MAY BE REQUIRED IN THE NEXT HOUR FOR PORTIONS OF CENTRAL-NRN
IND INTO NWRN OH.

CLUSTER OF STORMS...CURRENTLY OVER NWRN IND...IS MOVING TO THE EAST
AT 25 KT...WHILE ADDITIONAL STORMS CONTINUE TO DEVELOP SWD ACROSS
EAST CENTRAL IL WHERE THE AIR MASS IS EXTREMELY UNSTABLE /MLCAPE UP
TO 4500 J/KG/. INCREASING WLY LOW-MID LEVEL WINDS THIS EVENING
ACROSS CENTRAL-NRN IND INTO WRN OH IS EXPECTED TO ALLOW THE
CONTINUATION OF ACTIVITY AS IT SPREADS EWD.

FURTHER NORTH...THE LINE OF STORMS ACROSS CENTRAL-SRN LOWER MI WILL
CONTINUE TO MOVE EWD...REACHING ONTARIO BY 02-03Z.  DOWNSTREAM
MODERATELY UNSTABLE AIR MASS WILL SUPPORT A THREAT FOR DAMAGING
WINDS AS THIS ACTIVITY MOVES EWD AT 30-35 KT.

..PETERS.. 07/21/2004

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

ATTN...WFO...CLE...ILN...DTX...APX...IWX...GRR...IND...LOT...ILX...

44128437 44868241 41188268 39738562 39278793 39438832
41398746 42448610 43038466 

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