SWOMCD
SPC MCD 190002
PAZ000-WVZ000-OHZ000-190100-
MESOSCALE DISCUSSION 1657
NWS STORM PREDICTION CENTER NORMAN OK
0702 PM CDT MON JUL 18 2011
AREAS AFFECTED...OH...WRN PA
CONCERNING...SEVERE THUNDERSTORM WATCH 658...
VALID 190002Z - 190100Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 658
CONTINUES.
WARM ADVECTION APPEARS TO BE A PRIMARY MECHANISM DRIVING SCATTERED
THUNDERSTORM ACTIVITY FROM SERN LOWER MI...SEWD INTO THE OH VALLEY.
ADDITIONALLY...A WEAK SHORT WAVE TROUGH IS DIGGING SEWD TOWARD THE
OH VALLEY AND THIS MAY PROVIDE SUFFICIENT ASCENT...GIVEN UNSTABLE
WLY FEED...FOR RENEWED THUNDERSTORM ACTIVITY ACROSS WRN PORTIONS OF
WW658 OVER THE NEXT FEW HOURS. OTHERWISE...BACK EDGE OF STRONGER
CONVECTION WILL SOON SPREAD SOUTH OF THE WATCH INTO SRN OH/NRN WV.
..DARROW.. 07/19/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PBZ...CLE...ILN...
LAT...LON 41608319 42037990 40447991 40018320 41608319
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