The subtropical ridge was to our south while the subtropical jet remained just to our north. An upper-level disturbance in the jet stream passed through on the 22nd. Warm and humid air was in place due to a west-southwest flow around the ridge. Moderate amounts of instability along with the upper-level disturbance caused showers and thunderstorms to develop. Some thunderstorms produced gusty winds over the waters.

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 22-JUN-10 20:23:00 to 22-JUN-10 20:23:00 (EST-5)
Location: CHESAPEAKE BIOLOGICAL LABORATORY
Magnitude: 37.00 MG
Reported by: Buoy

A wind gust of 37 knots was reported at Solomons Island.

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 22-JUN-10 20:13:00 to 22-JUN-10 20:13:00 (EST-5)
Location: PATUXENT RIVER BUOY
Magnitude: 35.00 MG
Reported by: Trained Spotter

A wind gust was estimated around 40 mph about 3 miles south-southeast of the Patuxent River Buoy.

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 22-JUN-10 20:45:00 to 22-JUN-10 20:45:00 (EST-5)
Location: PATUXENT RIVER BUOY
Magnitude: 35.00 MG
Reported by: Trained Spotter

A wind gust was estimated around 40 mph about 3 miles south-southeast of the Patuxent River Buoy.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 22-JUN-10 20:45:00 to 22-JUN-10 20:45:00 (EST-5)
Location: CAMBRIDGE
Magnitude: 50.00 EG
Reported by: Trained Spotter

A wind gust around 50 knots was reported about two miles north of Cambridge.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 22-JUN-10 20:23:00 to 22-JUN-10 20:25:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 40.00 MG
Reported by: ASOS

Wind gusts between 35 and 40 knots were reported at Patuxent River.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 22-JUN-10 18:16:00 to 22-JUN-10 18:16:00 (EST-5)
Location: MARTIN STATE AIRPORT
Magnitude: 52.00 EG
Reported by: Public

A wind gust of 60 mph was estimated due to thunderstorm wind damage about five miles northeast of the Martin State Airport.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 22-JUN-10 18:54:00 to 22-JUN-10 19:04:00 (EST-5)
Location: QUANTICO
Magnitude: 49.00 MG
Reported by: ASOS

Wind gusts up to 49 knots were reported at Quantico.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 22-JUN-10 19:01:00 to 22-JUN-10 19:01:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 48.00 MG
Reported by: ASOS

A wind gust of 48 knots was measured at the Reagan National Airport.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 22-JUN-10 19:00:00 to 22-JUN-10 19:00:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 52.00 EG
Reported by: Trained Spotter

Wind gusts of 60 mph were estimated due to thunderstorm wind gusts about one mile northwest of the Reagan National Airport.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 22-JUN-10 20:00:00 to 22-JUN-10 20:00:00 (EST-5)
Location: CHESAPEAKE BEACH
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots was reported at Chesapeake Beach.

Marine Hail in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 22-JUN-10 18:16:00 to 22-JUN-10 18:16:00 (EST-5)
Location: MARTIN STATE AIRPORT
Magnitude: 0.75 
Reported by: Public

Penny size hail was reported about five miles northeast of the Martin State Airport.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 22-JUN-10 20:24:00 to 22-JUN-10 20:24:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 38.00 MG
Reported by: ASOS

A wind gust of 38 knots was reported at Patuxent River.