A potent cold front passed through the waters on the first. Ahead of the front, plenty of moisture lead to unstable conditions. The instability combined with the forcing from the front to trigger showers and thunderstorms. Thunderstorms produced gusty winds and large hail.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 21:10:00 to 01-JUL-09 21:10:00 (EST-5)
Location: RACCOON POINT
Magnitude: 53.00 MG
Reported by: Mesonet

A wind gust of 53 knots was measured at Raccoon Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 20:26:00 to 01-JUL-09 20:26:00 (EST-5)
Location: LOWER HOOPERS ISLAND
Magnitude: 34.00 MG
Reported by: Mesonet

A wind gust of 34 knots was reported at Lower Hoopers island.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 20:06:00 to 01-JUL-09 20:06:00 (EST-5)
Location: LEWISETTA
Magnitude: 34.00 EG
Reported by: Buoy

A wind gust in excess of 30 knots was reported at Lewisetta.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 20:20:00 to 01-JUL-09 20:20:00 (EST-5)
Location: POINT LOOKOUT
Magnitude: 45.00 MG
Reported by: Mesonet

A wind gust of 45 knots was reported at Point Lookout.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 21:10:00 to 01-JUL-09 21:10:00 (EST-5)
Location: CRISFIELD
Magnitude: 40.00 EG
Reported by: Trained Spotter

A wind gust was estimated around 40 knots at Crisfield.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 21:07:00 to 01-JUL-09 21:07:00 (EST-5)
Location: CRISFIELD
Magnitude: 36.00 MG
Reported by: Mesonet

A wind gust of 36 knots was measured at Crisfield.

Waterspout in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 01-JUL-09 18:52:00 to 01-JUL-09 18:59:00 (EST-5)
Location: COLONIAL BEACH
Reported by: Public

A waterspout was spotted by the public near Colonial Beach.

Marine Hail in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 19:10:00 to 01-JUL-09 19:10:00 (EST-5)
Location: PINEY POINT
Magnitude: 0.75 
Reported by: Fire Department/Rescue

Penny size hail was reported near Cobb Island.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 19:14:00 to 01-JUL-09 19:14:00 (EST-5)
Location: PINEY POINT
Magnitude: 50.00 EG
Reported by: Public

A tree fell onto a house near Leonardtown.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 19:26:00 to 01-JUL-09 19:26:00 (EST-5)
Location: PINEY POINT
Magnitude: 50.00 EG
Reported by: Public

A tree fell onto a house near Compton.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 19:26:00 to 01-JUL-09 19:26:00 (EST-5)
Location: PINEY POINT
Magnitude: 50.00 EG
Reported by: Public

A tree fell onto a house near Compton.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 20:45:00 to 01-JUL-09 20:45:00 (EST-5)
Location: SMITH ISLAND
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported at Smith Island.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 20:05:00 to 01-JUL-09 20:05:00 (EST-5)
Location: ST INIGOES
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported at Saint Inigoes.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 20:44:00 to 01-JUL-09 20:44:00 (EST-5)
Location: BISHOPS HEAD
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots was reported at Bishops Head.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 21:09:00 to 01-JUL-09 21:09:00 (EST-5)
Location: BISHOPS HEAD
Magnitude: 50.00 EG
Reported by: Law Enforcement

A wind gust of 50 knots was estimated based off thunderstorm wind damage near Bishops Head.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 01-JUL-09 20:30:00 to 01-JUL-09 20:30:00 (EST-5)
Location: POINT LOOKOUT
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported at Point Lookout.