

349 

WWUS20 KWNS 201820

SEL7

SPC WW 201820

DCZ000-MDZ000-PAZ000-VAZ000-WVZ000-CWZ000-210300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 317

NWS STORM PREDICTION CENTER NORMAN OK

220 PM EDT SAT JUN 20 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  DISTRICT OF COLUMBIA

  MARYLAND

  SOUTHERN PENNSYLVANIA

  NORTHERN VIRGINIA

  EASTERN AND NORTHERN WEST VIRGINIA

  COASTAL WATERS



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 220 PM UNTIL

  1100 PM EDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...TO THE EAST OF THE REMNANTS OF BILL...STRONG TO SEVERE

THUNDERSTORMS ARE EXPECTED TO INCREASE THROUGH THE AFTERNOON/EARLY

EVENING HOURS WITHIN AN ENVIRONMENT CHARACTERIZED BY MODERATE

INSTABILITY AND INCREASING SHEAR. DAMAGING WINDS AND MARGINALLY

SEVERE HAIL WILL BE POSSIBLE AND SOME TORNADO RISK WILL EXIST AS

WELL.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF

ELKINS WEST VIRGINIA TO 20 MILES EAST NORTHEAST OF BALTIMORE

MARYLAND.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



&&



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 26025.





...GUYER



979 

WWUS20 KWNS 201820

SEL7

SPC WW 201820

DCZ000-MDZ000-PAZ000-VAZ000-WVZ000-CWZ000-210300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 317

NWS STORM PREDICTION CENTER NORMAN OK

220 PM EDT SAT JUN 20 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  DISTRICT OF COLUMBIA

  MARYLAND

  SOUTHERN PENNSYLVANIA

  NORTHERN VIRGINIA

  EASTERN AND NORTHERN WEST VIRGINIA

  COASTAL WATERS



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 220 PM UNTIL

  1100 PM EDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...TO THE EAST OF THE REMNANTS OF BILL...STRONG TO SEVERE

THUNDERSTORMS ARE EXPECTED TO INCREASE THROUGH THE AFTERNOON/EARLY

EVENING HOURS WITHIN AN ENVIRONMENT CHARACTERIZED BY MODERATE

INSTABILITY AND INCREASING SHEAR. DAMAGING WINDS AND MARGINALLY

SEVERE HAIL WILL BE POSSIBLE AND SOME TORNADO RISK WILL EXIST AS

WELL.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF

ELKINS WEST VIRGINIA TO 20 MILES EAST NORTHEAST OF BALTIMORE

MARYLAND.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



&&



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 26025.





...GUYER

