A cold front passed through the waters on the 26th. Hot and humid conditions ahead of the front caused moderate amounts of instability. The cold front triggered showers and thunderstorms. There was enough instability for thunderstorms to produce gusty winds.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 26-JUL-12 19:20:00 to 26-JUL-12 19:20:00 (EST-5)
Location: SUSQUEHANNA
Magnitude: 35.00 MG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 26-JUL-12 19:29:00 to 26-JUL-12 19:29:00 (EST-5)
Location: HAVRE DE GRACE
Magnitude: 34.00 MG
Reported by: Mesonet

A wind gust of 34 knots was reported at Havre De Grace.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 26-JUL-12 20:23:00 to 26-JUL-12 20:23:00 (EST-5)
Location: MILLER ISLAND
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 26-JUL-12 21:40:00 to 26-JUL-12 21:40:00 (EST-5)
Location: PATAPSCO BUOY
Magnitude: 39.00 MG
Reported by: Buoy

A wind gust of 39 knots was reported at the Patapsco Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 26-JUL-12 21:32:00 to 26-JUL-12 21:32:00 (EST-5)
Location: BALTIMORE APPROACHES BUOY
Magnitude: 39.00 MG
Reported by: Mesonet

A wind gust of 39 knots was measured at Tolchester Beach.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 26-JUL-12 22:42:00 to 26-JUL-12 22:42:00 (EST-5)
Location: CAMBRIDGE
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 26-JUL-12 21:23:00 to 26-JUL-12 21:27:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 36.00 MG
Reported by: Mesonet

Wind gusts up to 36 knots were reported at Greenbury Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 26-JUL-12 21:31:00 to 26-JUL-12 21:31:00 (EST-5)
Location: TOLLY POINT
Magnitude: 34.00 EG
Reported by: Mesonet

Wind gusts in excess of 30 knots were measured at Tolly Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 26-JUL-12 21:45:00 to 26-JUL-12 21:45:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 39.00 MG
Reported by: C-MAN Station

A wind gust of 39 knots was measured at Thomas Point Lighthouse.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 26-JUL-12 22:46:00 to 26-JUL-12 22:54:00 (EST-5)
Location: COVE POINT
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of 38 knots were measured at Cove Point.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 26-JUL-12 22:21:00 to 26-JUL-12 22:27:00 (EST-5)
Location: POTOMAC LIGHT
Magnitude: 34.00 EG
Reported by: Mesonet

Wind gusts in excess of 30 knots was reported at the Potomac Lighthouse.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 26-JUL-12 21:19:00 to 26-JUL-12 21:19:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 37.00 MG
Reported by: ASOS

A wind gust of 37 knots was measured at Reagan National.