

233 

WWUS20 KWNS 092031

SEL5

SPC WW 092031

MDZ000-OHZ000-PAZ000-WVZ000-100200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 45

NWS STORM PREDICTION CENTER NORMAN OK

430 PM EDT THU APR 9 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN MARYLAND PANHANDLE

  EASTERN OHIO

  WESTERN PENNSYLVANIA

  NORTHERN WEST VIRGINIA



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 430 PM UNTIL

  1000 PM EDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EITHER SIDE OF A LINE FROM 25 MILES SOUTH SOUTHWEST

OF WHEELING WEST VIRGINIA TO 20 MILES EAST NORTHEAST OF LATROBE

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 39...WW 40...WW 41...WW

42...WW 43...WW 44...



DISCUSSION...CLUSTER OF THUNDERSTORMS THAT DEVELOPED ALONG THE OH

RIVER HAS EVOLVED INTO AN MCS THAT IS TRACKING ENEWD AT ROUGHLY

40KT.  THIS ACTIVITY SHOULD SPREAD INTO WESTERN PA AROUND 22Z.

DAMAGING WINDS ARE THE PRIMARY SEVERE THREAT...ALTHOUGH ISOLATED

LARGE HAIL IS POSSIBLE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25035.





...DARROW



179 

WWUS20 KWNS 092031

SEL5

SPC WW 092031

MDZ000-OHZ000-PAZ000-WVZ000-100200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 45

NWS STORM PREDICTION CENTER NORMAN OK

430 PM EDT THU APR 9 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN MARYLAND PANHANDLE

  EASTERN OHIO

  WESTERN PENNSYLVANIA

  NORTHERN WEST VIRGINIA



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 430 PM UNTIL

  1000 PM EDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EITHER SIDE OF A LINE FROM 25 MILES SOUTH SOUTHWEST

OF WHEELING WEST VIRGINIA TO 20 MILES EAST NORTHEAST OF LATROBE

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 39...WW 40...WW 41...WW

42...WW 43...WW 44...



DISCUSSION...CLUSTER OF THUNDERSTORMS THAT DEVELOPED ALONG THE OH

RIVER HAS EVOLVED INTO AN MCS THAT IS TRACKING ENEWD AT ROUGHLY

40KT.  THIS ACTIVITY SHOULD SPREAD INTO WESTERN PA AROUND 22Z.

DAMAGING WINDS ARE THE PRIMARY SEVERE THREAT...ALTHOUGH ISOLATED

LARGE HAIL IS POSSIBLE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25035.





...DARROW

