At 1147 PM EDT, Doppler radar was tracking a strong thunderstorm near Gettysburg, moving northeast at 30 mph. HAZARD. Wind gusts of 50 to 55 mph. SOURCE. Radar indicated. IMPACT. Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include. Weigelstown, Hampton, Shiloh, Dillsburg, Lake Meade, Dover, East Berlin, Siddonsburg, York Springs, Heidlersburg, Hunterstown, Franklintown, Wellsville, Ski Roundtop Ski Area, and Messiah College.

At 1123 PM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Gettysburg to Emmitsburg to near Thurmont to near Frederick. Movement was northeast at 35 mph. HAZARD. Wind gusts up to 50 mph. SOURCE. Radar indicated. IMPACT. Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include. Hanover, Gettysburg, Parkville, Littlestown, Codorus, McSherrystown, Spring Grove, Glen Rock, Pennville, Bonneauville, New Oxford, East Berlin, Lake Heritage, York Airport, Abbottstown, Seven Valleys, Glenville, Two Taverns, Gettysburg National Military Park, and Gettysburg College.

* WHAT. South winds 10 to 20 kt with gusts up to 25 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. Until 6 PM EDT Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 10 to 15 kt with gusts up to 25 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, and Patuxent River to Broomes Island MD. * WHEN. From 6 AM to 6 PM EDT Monday. * IMPACTS. Conditions will be hazardous to small craft.