THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH UNTIL 8:00PM EDT
Sel8 spc Ww 271641

Urgent - Immediate Broadcast Requested Severe Thunderstorm Watch Number 618 Nws Storm Prediction Center Norman OK 1240 PM EDT Fri Jun 27 2008

The Nws Storm Prediction Center Has Issued A Severe Thunderstorm Watch For Portions Of

District Of Columbia Delaware Eastern Maryland Southern New Jersey Parts Of Southeast Pennsylvania A Large Part Of Virginia Coastal Waters

Effective This Friday Afternoon And Evening From 1240 PM Until 800 PM EDT.

Hail To 2 Inches In Diameter... Thunderstorm Wind Gusts To 70 Mph... And Dangerous Lightning Are Possible In These Areas.

The Severe Thunderstorm Watch Area Is Approximately Along And 100 Statute Miles East And West Of A Line From 55 Miles South Southeast Of Roanoke Virginia To 10 Miles North Of Philadelphia Pennsylvania. For A Complete Depiction Of The Watch See The Associated Watch Outline Update (wous64 Kwns Wou8).

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.

Discussion... Thunderstorms Will Increase In Number And Intensity Over And E Of Higher Terrain As Air Mass Is Now Mdtly Unstable With Mlcapes Aoa 2000 J/Kg. With 20-30 Kt Of Mid Level Flow Primary Threat Will Be Damaging Winds Associated With Short Line Segments Along With Marginally Severe Hail. Activity Will Develop Ewd Across The Lower Elevations Thru The Afternoon.

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 26020.

... Hales