

992 

WWUS20 KWNS 261738

SEL6

SPC WW 261738

KYZ000-MDZ000-NYZ000-OHZ000-PAZ000-VAZ000-WVZ000-LEZ000-270100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 726

NWS STORM PREDICTION CENTER NORMAN OK

135 PM EDT TUE OCT 26 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN KENTUCKY

       WESTERN MARYLAND PANHANDLE

       FAR WESTERN NEW YORK

       EASTERN OHIO

       WESTERN PENNSYLVANIA

       FAR WESTERN VIRGINIA

       WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 135 PM UNTIL

900 PM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH OF FRANKLIN

PENNSYLVANIA TO 50 MILES WEST OF BLUEFIELD WEST VIRGINIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.



OTHER WATCH INFORMATION...CONTINUE...WW 722...WW 723...WW

724...WW 725...



DISCUSSION...LONG-LIVED QLCS WITH A HISTORY OF WIDESPREAD WIND

DAMAGE AND A FEW TORNADOES IS EXPECTED TO CONTINUE EWD THROUGH THE

UPPER OH VALLEY AND CUMBERLAND PLATEAU THIS AFTERNOON INTO EVENING.

BOUNDARY LAYER AHEAD OF CONVECTIVE SYSTEM IS WARMING/MOISTENING...

SUPPORTING A NARROW AXIS OF MARGINAL...BUT SUFFICIENT INSTABILITY.

GIVEN THE VERY STRONG LOW AND DEEP-LAYER SHEAR IN PLACE...

ENVIRONMENT WILL REMAIN FAVORABLE FOR EMBEDDED BOWS AND SUPERCELLS

CAPABLE OF DAMAGING WINDS AND A FEW TORNADOES.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 24045.





...MEAD

