An area of low pressure was located over the Mid Atlantic which increased tropical southerly flow to the region. Heavy rain was the main threat but isolated thunderstorms produced damaging winds and lightning.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 26-AUG-12 07:00:00 to 26-AUG-12 07:00:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts in excess of 32 knots were reported at Thomas Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 26-AUG-12 12:47:00 to 26-AUG-12 12:47:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 31 knots were reported at Greenbury Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 26-AUG-12 13:00:00 to 26-AUG-12 13:00:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts in excess of 31 knots were reported at Thomas Point.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 26-AUG-12 13:24:00 to 26-AUG-12 13:30:00 (EST-5)
Location: RIVIERA BEACH
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 31 knots were reported at Francis Scott Key Bridge.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 16:00:00 to 26-AUG-12 16:00:00 (EST-5)
Location: POTOMAC BUOY
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts in excess of 31 knots were reported at Point Lookout CBIBS Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 16:11:00 to 26-AUG-12 16:11:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts in excess of 31 knots were reported at Patuxent River NAS.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 26-AUG-12 17:40:00 to 26-AUG-12 17:40:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 42 knots were reported at Gooses Reef CBIBS Buoy.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 18:29:00 to 26-AUG-12 18:29:00 (EST-5)
Location: PINEY POINT
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts of 34 knots were reported at St Inigoes.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 17:54:00 to 26-AUG-12 18:06:00 (EST-5)
Location: LEWISETTA
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 35 knots were reported at Lewisetta.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 17:54:00 to 26-AUG-12 18:06:00 (EST-5)
Location: LEWISETTA
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 35 knots were reported at Lewisetta.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 18:12:00 to 26-AUG-12 18:12:00 (EST-5)
Location: PINEY POINT
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 36 knots were reported at Piney Point.

Waterspout in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 10:53:00 to 26-AUG-12 10:53:00 (EST-5)
Location: PINEY POINT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was a waterspout that was sited.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 26-AUG-12 15:05:00 to 26-AUG-12 15:20:00 (EST-5)
Location: CHESAPEAKE BEACH
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts up to 35 knots were reported at Blackwalnut Harbor.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 17:54:00 to 26-AUG-12 18:06:00 (EST-5)
Location: LEWISETTA
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts up to 42 knots were reported at Lewisetta.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 17:54:00 to 26-AUG-12 18:06:00 (EST-5)
Location: LEWISETTA
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts up to 42 knots were reported at Lewisetta.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 26-AUG-12 15:00:00 to 26-AUG-12 16:00:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts up to 37 knots were reported at Gooses Reef CBIBS Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 26-AUG-12 19:00:00 to 26-AUG-12 19:20:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts up to 38 knots were reported at Gooses Reef CBIBS Buoy.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 26-AUG-12 18:48:00 to 26-AUG-12 19:06:00 (EST-5)
Location: CAMBRIDGE
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts up to 39 knots were reported at Cambridge.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 26-AUG-12 10:55:00 to 26-AUG-12 10:55:00 (EST-5)
Location: POINT LOOKOUT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 37 knots were reported at Point Lookout.