A cold front approached the Mid Atlantic while a surface trough was located across the Potomac Highlands. Southerly flow ahead of both features led to humid and warm conditions across the region. Showers and thunderstorms formed in vicinity of the surface trough and moved eastward. Some storms became severe producing damaging winds and large hail.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 09-JUL-14 17:54:00 to 09-JUL-14 18:06:00 (EST-5)
Location: PINEY POINT
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 31-40 knots were measured at Piney Point.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 09-JUL-14 18:09:00 to 09-JUL-14 18:09:00 (EST-5)
Location: PINEY POINT
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Wind gusts of 34 knots were measured at St. Inigoes.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 09-JUL-14 16:09:00 to 09-JUL-14 16:09:00 (EST-5)
Location: SUSQUEHANNA
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 36 knots were measured at North Bay North East.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 09-JUL-14 16:35:00 to 09-JUL-14 16:35:00 (EST-5)
Location: MARTIN STATE AIRPORT
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 36 knots were measured at Gunpowder.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 09-JUL-14 16:27:00 to 09-JUL-14 16:27:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 46.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Wind gusts of 46 knots were measured at Quantico.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-JUL-14 17:15:00 to 09-JUL-14 17:30:00 (EST-5)
Location: BABAR POINT
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 31-34 knots were measured at Baber Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 09-JUL-14 18:12:00 to 09-JUL-14 18:24:00 (EST-5)
Location: COVE POINT
Magnitude: 46.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 46 knots were measured at Cove Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 09-JUL-14 18:13:00 to 09-JUL-14 18:13:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts of 40 knots were measured at Annapolis.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 09-JUL-14 18:20:00 to 09-JUL-14 18:20:00 (EST-5)
Location: PATUXENT RIVER ASOS
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 31 knots were measured at Gooses Reef Buoy.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-JUL-14 17:12:00 to 09-JUL-14 17:28:00 (EST-5)
Location: CUCKOLD CREEK
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 34 knots were measured at Cuckold Creek.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-JUL-14 17:15:00 to 09-JUL-14 17:15:00 (EST-5)
Location: MONROE CREEK
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 32 knots were measured at Monroe Creek.