A strong cold front slowly traced through the area during the morning hours of the 5th. A southerly flow ahead of the front caused copious amounts of moisture to move into the region from the Atlantic Ocean and Gulf of Mexico. The deep moisture combined with a mid-level trough that was associated with the cold front to produce moderate amounts of instability. Lift from the cold front along with moderate instability triggered showers and thunderstorms across the waters.
Thunderstorms were able to mix down gusty winds from aloft.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 05-APR-11 05:00:00 to 05-APR-11 05:00:00 (EST-5)
Location: BISHOPS HEAD
Magnitude: 60.00 MG
Reported by: Mesonet

A wind gust of 60 knots was reported at Bishops Head.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 05-APR-11 05:06:00 to 05-APR-11 05:12:00 (EST-5)
Location: BISHOPS HEAD
Magnitude: 54.00 MG
Reported by: Mesonet

Wind gusts up to 54 knots were reported at Bishops Head.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 05-APR-11 05:20:00 to 05-APR-11 05:20:00 (EST-5)
Location: RACCOON POINT
Magnitude: 49.00 MG
Reported by: Mesonet

A wind gust of 49 knots was reported at Raccoon Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 05-APR-11 04:58:00 to 05-APR-11 05:09:00 (EST-5)
Location: SMITH ISLAND
Magnitude: 52.00 MG
Reported by: Mesonet

Wind gusts up to 52 knots were reported at Smith Island.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 05-APR-11 04:40:00 to 05-APR-11 04:50:00 (EST-5)
Location: POTOMAC BUOY
Magnitude: 48.00 MG
Reported by: Buoy

Wind gusts up to 48 knots were reported the Potomac Buoy.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 05-APR-11 04:40:00 to 05-APR-11 04:45:00 (EST-5)
Location: POINT LOOKOUT
Magnitude: 50.00 MG
Reported by: Mesonet

Wind gusts up to 50 knots were reported at Point Lookout.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 05-APR-11 08:14:00 to 05-APR-11 08:29:00 (EST-5)
Location: MILLER ISLAND
Magnitude: 38.00 MG
Reported by: Mesonet

Wind gusts between 37 and 38 knots were reported at Miller Island.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 05-APR-11 09:00:00 to 05-APR-11 09:00:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 41.00 MG
Reported by: Buoy

A wind gust of 41 knots was measured at the Thomas Point Lighthouse.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 05-APR-11 04:10:00 to 05-APR-11 04:10:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 57.00 MG
Reported by: Mesonet

A wind gust of 57 knots was reported at Herring Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 05-APR-11 08:21:00 to 05-APR-11 08:21:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 36.00 MG
Reported by: Mesonet

A wind gust of 36 knots was measured at Greenberry Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 05-APR-11 09:11:00 to 05-APR-11 09:11:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 34.00 MG
Reported by: Mesonet

A wind gust of 34 knots was reported at Greenberry Point.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 05-APR-11 08:18:00 to 05-APR-11 08:42:00 (EST-5)
Location: RIVIERA BEACH
Magnitude: 37.00 MG
Reported by: Buoy

Wind gust between 36 and 37 knots were reported at the Francis Scott Key Bridge.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 08:40:00 to 05-APR-11 08:56:00 (EST-5)
Location: POTOMAC LIGHT
Magnitude: 38.00 MG
Reported by: Mesonet

Wind gusts of 38 knots were reported at the Potomac Lighthouse.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 08:44:00 to 05-APR-11 08:44:00 (EST-5)
Location: CUCKOLD CREEK
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots was reorted at Cuckold Creek.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 03:24:00 to 05-APR-11 03:24:00 (EST-5)
Location: QUANTICO
Magnitude: 52.00 MG
Reported by: ASOS

A wind gust of 52 knots was measured at Quantico.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 03:50:00 to 05-APR-11 03:50:00 (EST-5)
Location: MONROE CREEK
Magnitude: 51.00 MG
Reported by: Mesonet

A wind gust of 51 knots was reported at Monroe Creek.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 05-APR-11 08:25:00 to 05-APR-11 08:45:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 37.00 MG
Reported by: Mesonet

Wind gusts up to 37 knots were reported at Herring Bay.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 05-APR-11 03:35:00 to 05-APR-11 03:35:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 48.00 MG
Reported by: ASOS

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

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 05-APR-11 09:10:00 to 05-APR-11 09:10:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 34.00 EG
Reported by: Mesonet

Wind gusts in excess of 30 knots were reported at Herring Bay.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 05-APR-11 08:00:00 to 05-APR-11 08:25:00 (EST-5)
Location: BALTIMORE CITY
Magnitude: 39.00 MG
Reported by: Mesonet

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

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 05-APR-11 08:13:00 to 05-APR-11 08:13:00 (EST-5)
Location: ORIOLE PARK AT CAMDEN YARDS
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots was reported at Orioles Park.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 05-APR-11 07:42:00 to 05-APR-11 07:42:00 (EST-5)
Location: WASHINGTON NATIONALS PARK
Magnitude: 34.00 MG
Reported by: Mesonet

A wind gust of 34 knots was reported in Washington DC.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 05-APR-11 08:15:00 to 05-APR-11 08:34:00 (EST-5)
Location: MARYLAND SCIENCE CENTER
Magnitude: 34.00 EG
Reported by: Mesonet

Wind gusts in excess of 30 knots was reported at the Maryland Science Center.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 05-APR-11 08:04:00 to 05-APR-11 08:04:00 (EST-5)
Location: WASHINGTON NATIONALS PARK
Magnitude: 44.00 MG
Reported by: Mesonet

A wind gust of 44 knots was reported at Nationals Park.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 07:48:00 to 05-APR-11 07:54:00 (EST-5)
Location: QUANTICO
Magnitude: 35.00 MG
Reported by: Mesonet

Wind gusts up to 35 knots were reported at Mason Neck.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 03:43:00 to 05-APR-11 03:43:00 (EST-5)
Location: ROUTE 301 BRIDGE
Magnitude: 50.00 MG
Reported by: Mesonet

A wind gust of 50 knots was measured at the Route 301 Bridge.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 08:45:00 to 05-APR-11 08:55:00 (EST-5)
Location: MONROE CREEK
Magnitude: 46.00 MG
Reported by: Mesonet

Wind gusts up to 46 knots were reported at Monroe Creek.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 05-APR-11 08:22:00 to 05-APR-11 08:55:00 (EST-5)
Location: GUNPOWDER FALLS STATE PARK
Magnitude: 34.00 MG
Reported by: Mesonet

A wind gust of 34 knot was measured at the Deerfield Elementary School.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 05-APR-11 08:35:00 to 05-APR-11 08:50:00 (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 CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 05-APR-11 08:36:00 to 05-APR-11 08:36:00 (EST-5)
Location: BALTIMORE APPROACHES BUOY
Magnitude: 34.00 EG
Reported by: Mesonet

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