A cold front moved through the Mid Atlantic the evening. Warm conditions during the day led to increased instability and showers and thunderstorms formed due to convergence.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-AUG-13 16:00:00 to 09-AUG-13 16:00:00 (EST-5)
Location: ANNAPOLIS
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts in excess of 34 knots were measured at Annapolis.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-AUG-13 16:03:00 to 09-AUG-13 16:08:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 37 knots were measured at Greenbury Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-AUG-13 16:07:00 to 09-AUG-13 16:27:00 (EST-5)
Location: TOLLY POINT
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 40 knots were measured at Tolly Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-AUG-13 16:10:00 to 09-AUG-13 16:10:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts in excess of 39 knots were measured at Annapolis Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-AUG-13 16:15:00 to 09-AUG-13 16:15:00 (EST-5)
Location: STEVENSVILLE
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Wind gusts in excess of 33 knots were measured at Stevensville.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-AUG-13 17:00:00 to 09-AUG-13 17:00:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 33 knots were measured at Thomas Point Lighthouse.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-AUG-13 18:00:00 to 09-AUG-13 18:10:00 (EST-5)
Location: BABAR POINT
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 41 knots were measured at Baber Point.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-AUG-13 18:23:00 to 09-AUG-13 18:37:00 (EST-5)
Location: CUCKOLD CREEK
Magnitude: 44.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 44 knots were measured at Cuckold Creek.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-AUG-13 18:23:00 to 09-AUG-13 18:37:00 (EST-5)
Location: COBB POINT
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 38 knots were measured at Cove Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 09-AUG-13 18:45:00 to 09-AUG-13 20:34:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts in excess of 41 knots were measured at Patuxent River.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 09-AUG-13 19:30:00 to 09-AUG-13 20:42:00 (EST-5)
Location: BISHOPS HEAD
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 39 knots were measured at Bishops Head.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 09-AUG-13 19:32:00 to 09-AUG-13 19:35:00 (EST-5)
Location: BISHOPS HEAD
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 43 knots were measured at Bishops Head.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 09-AUG-13 20:25:00 to 09-AUG-13 20:25:00 (EST-5)
Location: LOWER HOOPERS ISLAND
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 34 knots were measured at Lower Hooper Island.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-AUG-13 17:15:00 to 09-AUG-13 17:20:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 38 knots were measured at Herring Bay.