A cold front approached the region on July 27th as a strong upper level low pressure system remained over the northeast. Warm and humid air at the surface interacted with cooler air aloft to produce scattered to numerous showers and thunderstorms during the afternoon hours. Many of the storms became severe, producing wind gusts of 30 to nearly 60 knots over the Tidal Potomac River and Maryland Chesapeake Bay. One storm moved over Fairview Beach during an afternoon festival. Boats near the beach were hit by 4 foot waves, with several people being rescued from the water. Only minor injuries were reported.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 27-JUL-08 15:48:00 to 27-JUL-08 16:12:00 (EST-5)
Location: BISHOPS HEAD
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated observation at Bishops Head measured a wind gust of 34 knots.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 27-JUL-08 13:55:00 to 27-JUL-08 13:55:00 (EST-5)
Location: CUCKOLD CREEK
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated observation at Cuckold Creek measured a wind gust of 41 knots.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 27-JUL-08 12:53:00 to 27-JUL-08 12:53:00 (EST-5)
Location: FORT BELVOIR
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

An automated observation at Fort Belvoir measured a wind gust of 34 knots.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 27-JUL-08 13:07:00 to 27-JUL-08 13:12:00 (EST-5)
Location: RONALD REAGAN NATL ARPT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

An automated observation at Reagan National Airport measured a wind gust of 37 knots.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 27-JUL-08 13:35:00 to 27-JUL-08 13:35:00 (EST-5)
Location: DAHLGREN
Magnitude: 40.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Boats off Fairview Beach were hit by an estimated 40 knot wind gust and waves near 4 feet. Several boats were damaged when they were pushed into rocks. Several people were rescued from the water, with 3 minor injuries reported.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 27-JUL-08 13:20:00 to 27-JUL-08 13:20:00 (EST-5)
Location: QUANTICO
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

An automated observation at Quantico measured a wind gust of 41 knots.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 27-JUL-08 12:00:00 to 27-JUL-08 12:00:00 (EST-5)
Location: RIVIERA BEACH
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

The buoy at Baltimore Key Bridge measured a wind gust of 34 knots.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 27-JUL-08 15:55:00 to 27-JUL-08 16:18:00 (EST-5)
Location: CRISFIELD
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated observation at Crisfield measured a wind gust of 57 knots.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 27-JUL-08 15:06:00 to 27-JUL-08 15:30:00 (EST-5)
Location: LEWISETTA
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

A buoy at Lewisetta measured a wind gust of 37 knots.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 27-JUL-08 15:10:00 to 27-JUL-08 15:10:00 (EST-5)
Location: POINT LOOKOUT
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated observation at Point Lookout measured a wind gust of 43 knots.