A strong upper-level disturbance and its associated cold front moved over the waters on the 25th. Hot and humid conditions ahead of the front led to high amounts of instability. Showers and thunderstorms developed along and ahead of the cold front. Due to the high amounts of instability, some thunderstorms were able to mix down strong winds from aloft.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 25-JUL-10 15:45:00 to 25-JUL-10 16:24:00 (EST-5)
Location: COVE POINT
Magnitude: 44.00 MG
Reported by: Buoy

Wind gusts between 34 and 44 knots were reported at Cove Point.

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 25-JUL-10 16:00:00 to 25-JUL-10 16:31:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 38.00 MG
Reported by: ASOS

Wind gusts up to 38 knots were reported at Patuxent River.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 25-JUL-10 16:12:00 to 25-JUL-10 16:24:00 (EST-5)
Location: PINEY POINT
Magnitude: 37.00 MG
Reported by: Buoy

Wind gusts up to 37 knots were reported at Piney Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUL-10 14:59:00 to 25-JUL-10 14:59:00 (EST-5)
Location: US NAVAL ACADEMY
Magnitude: 54.00 MG
Reported by: ASOS

A wind gust of 54 knots was measured at Annapolis.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 25-JUL-10 15:25:00 to 25-JUL-10 15:25:00 (EST-5)
Location: QUANTICO
Magnitude: 57.00 EG
Reported by: Fire Department/Rescue

Thunderstorm wind gusts were estimated to be around 57 knots due to damage about three miles northwest of Nanjemoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 25-JUL-10 15:30:00 to 25-JUL-10 15:30:00 (EST-5)
Location: CHESAPEAKE BEACH
Magnitude: 39.00 MG
Reported by: Mesonet

A wind gust of 39 knots was reported at Chesapeake Beach.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 25-JUL-10 15:42:00 to 25-JUL-10 15:42:00 (EST-5)
Location: CAMBRIDGE
Magnitude: 43.00 MG
Reported by: Buoy

A wind gust of 43 knots was reported at Cambridge.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 25-JUL-10 16:30:00 to 25-JUL-10 16:30:00 (EST-5)
Location: LEWISETTA
Magnitude: 34.00 MG
Reported by: Buoy

A wind gust of 34 knots was reported at Lewisetta.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 25-JUL-10 16:15:00 to 25-JUL-10 16:30:00 (EST-5)
Location: POTOMAC BUOY
Magnitude: 34.00 MG
Reported by: Buoy

A wind gust of 35 knots was reported at the Potomac Buoy.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 25-JUL-10 14:24:00 to 25-JUL-10 14:24:00 (EST-5)
Location: BALTIMORE CITY
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported near Fells Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUL-10 14:49:00 to 25-JUL-10 14:49:00 (EST-5)
Location: US NAVAL ACADEMY
Magnitude: 54.00 MG
Reported by: ASOS

A wind gust of 54 knots was measured at Annapolis.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUL-10 14:35:00 to 25-JUL-10 14:35:00 (EST-5)
Location: WASHINGTON NATIONALS PARK
Magnitude: 52.00 EG
Reported by: Public

Wind gusts were estimated around 60 mph due to thunderstorm wind damage about one mile west of the White House.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUL-10 14:48:00 to 25-JUL-10 14:48:00 (EST-5)
Location: WASHINGTON NATIONALS PARK
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots was measured at Washington D.C.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 25-JUL-10 14:55:00 to 25-JUL-10 14:55:00 (EST-5)
Location: POINT LOOKOUT
Magnitude: 38.00 MG
Reported by: Buoy

A wind gust of 38 knots was measured at the Potomac Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 25-JUL-10 14:10:00 to 25-JUL-10 14:30:00 (EST-5)
Location: SUSQUEHANNA
Magnitude: 37.00 MG
Reported by: Buoy

A wind gust of 37 knots was reported at the Susquehanna Buoy.

Marine Thunderstorm Wind in CHESTER RIVER TO QUEENSTOWN MD, ATLANTIC NORTH
From 25-JUL-10 15:12:00 to 25-JUL-10 15:12:00 (EST-5)
Location: TOLCHESTER BEACH
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 25-JUL-10 15:07:00 to 25-JUL-10 15:20:00 (EST-5)
Location: QUANTICO
Magnitude: 48.00 MG
Reported by: ASOS

Wind gusts between 35 and 48 knots were reported at Quantico.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 25-JUL-10 15:31:00 to 25-JUL-10 15:31:00 (EST-5)
Location: POTOMAC LIGHT
Magnitude: 45.00 EG
Reported by: Fire Department/Rescue

Wind gusts were estimated around 45 knots due to thunderstorm wind damage.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUL-10 14:37:00 to 25-JUL-10 14:37:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 43.00 MG
Reported by: Mesonet

A wind gust of 43 knots was measured at Rosslyn.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 25-JUL-10 15:39:00 to 25-JUL-10 16:04:00 (EST-5)
Location: POTOMAC LIGHT
Magnitude: 46.00 MG
Reported by: Mesonet

Wind gusts up to 46 knots were reported at the Potomac Lighthouse.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 25-JUL-10 15:37:00 to 25-JUL-10 15:52:00 (EST-5)
Location: BABAR POINT
Magnitude: 39.00 MG
Reported by: Mesonet

Wind gusts up to 39 knots were reported at Baber Point.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUL-10 14:40:00 to 25-JUL-10 14:40:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 35.00 MG
Reported by: Mesonet

A wind gust of 35 knots was reported near Reagan National Airport.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUL-10 14:40:00 to 25-JUL-10 14:58:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 46.00 MG
Reported by: ASOS

Wind gusts up to 46 knots were measured at Reagan National Airport.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUL-10 14:44:00 to 25-JUL-10 14:44:00 (EST-5)
Location: LYLES-CROUCH ACADEMY ALEXANDRIA
Magnitude: 35.00 MG
Reported by: Mesonet

A wind gust of 35 knots was measured near the Woodrow Wilson Bridge.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 25-JUL-10 14:55:00 to 25-JUL-10 14:55:00 (EST-5)
Location: QUANTICO
Magnitude: 38.00 MG
Reported by: Mesonet

A wind gust of 38 knots was measured at Mason Neck.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUL-10 14:44:00 to 25-JUL-10 14:44:00 (EST-5)
Location: LYLES-CROUCH ACADEMY ALEXANDRIA
Magnitude: 35.00 MG
Reported by: Mesonet

A wind gust of 35 knots was measured near Alexandria.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 25-JUL-10 15:43:00 to 25-JUL-10 15:43:00 (EST-5)
Location: POTOMAC LIGHT
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported near Dahlgren.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUL-10 15:08:00 to 25-JUL-10 15:08:00 (EST-5)
Location: TOLLY POINT
Magnitude: 50.00 MG
Reported by: Mesonet

A wind gust of 50 knots was measured at Tolly Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUL-10 15:17:00 to 25-JUL-10 15:17:00 (EST-5)
Location: KENT ISLAND
Magnitude: 34.00 EG
Reported by: Mesonet

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

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 25-JUL-10 16:12:00 to 25-JUL-10 16:24:00 (EST-5)
Location: CHESAPEAKE BIOLOGICAL LABORATORY
Magnitude: 36.00 MG
Reported by: Buoy

A wind gust of 36 knots was measured at Solomons Island.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 25-JUL-10 14:00:00 to 25-JUL-10 14:00:00 (EST-5)
Location: BALTIMORE CITY
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported near Fells Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUL-10 14:59:00 to 25-JUL-10 14:59:00 (EST-5)
Location: ROUTE 301 BRIDGE
Magnitude: 54.00 MG
Reported by: Mesonet

A wind gust of 54 knots was measured at Eastport.