SWOMCD
SPC MCD 112037
WVZ000-KYZ000-OHZ000-112200-
MESOSCALE DISCUSSION 1520
NWS STORM PREDICTION CENTER NORMAN OK
0337 PM CDT SAT JUL 11 2009
AREAS AFFECTED...PARTS OF SRN OH/WRN WV
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 112037Z - 112200Z
ALTHOUGH THE SEVERE THREAT MAY REMAIN FAIRLY LOCALIZED AND/OR SHORT
LIVED...TRENDS WILL CONTINUE TO BE CLOSELY MONITORED FOR THE
POSSIBILITY OF A MORE EXTENSIVE SEVERE THREAT THAT COULD REQUIRE A
WATCH.
NEAR THE BASE OF THE AMPLIFYING GREAT LAKES UPPER TROUGH...A SURFACE
MESO LOW HAS BECOME BETTER DEFINED DURING THE PAST HOUR OR SO
NEAR/NORTHWEST OF HUNTINGTON WV. THIS IS LIKELY IN ASSOCIATION WITH
A CONVECTIVELY INDUCED CYCLONIC VORTICITY CENTER APPROACHING THE
REGION WITHIN MODERATELY STRONG NORTHWESTERLY MID-LEVEL FLOW.
ALTHOUGH THE POTENTIAL LONGEVITY OF THIS FEATURE IS STILL
UNCLEAR...THE SMALL ONGOING CONVECTIVE CLUSTER AND EMBEDDED
SUPERCELL LIKELY WILL PERSIST THROUGH AT LEAST THE 21-23Z TIME
FRAME...SPREADING ACROSS HUNTINGTON AND ADJACENT AREAS OF EASTERN
KENTUCKY/WESTERN WEST VIRGINIA. POTENTIAL INSTABILITY IS NOT
PARTICULARLY STRONG...BUT MODESTLY LARGE LOW-LEVEL HODOGRAPHS MAY
SUPPORT AN ADDITIONAL ISOLATED TORNADO OR LOCALIZED STRONG DAMAGING
WINDS...AND PERHAPS SOME HAIL.
..KERR.. 07/11/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RLX...JKL...ILN...
LAT...LON 38978282 38698176 38288156 37658201 37628281 38168344
38978282
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