A subtropical ridge was over the Mid Atlantic with northwesterly flow leading to hot and humid conditions. This led to a unstable atmosphere and thunderstorms formed.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUN-13 22:08:00 to 25-JUN-13 22:13:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 35 knots were measured at Greenbury Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUN-13 22:10:00 to 25-JUN-13 22:30:00 (EST-5)
Location: GREENBERRY POINT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 37 knots were measured at Annapolis Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUN-13 22:12:00 to 25-JUN-13 22:27:00 (EST-5)
Location: TOLLY POINT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 37 knots were measured at Tolly Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUN-13 22:17:00 to 25-JUN-13 22:17:00 (EST-5)
Location: KENT ISLAND
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 Kent Island.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUN-13 23:00:00 to 25-JUN-13 23:00:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 36 knots were measured at Thomas Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 25-JUN-13 23:00:00 to 25-JUN-13 23:00:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 36 knots were measured at Thomas Point.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 25-JUN-13 21:30:00 to 25-JUN-13 21:30:00 (EST-5)
Location: BALTIMORE CITY
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 32 knots were measured at Baltimore.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 25-JUN-13 21:48:00 to 25-JUN-13 21:54:00 (EST-5)
Location: RIVIERA BEACH
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 35 knots were measured at Baltimore Key Bridge.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 25-JUN-13 21:50:00 to 25-JUN-13 22:00:00 (EST-5)
Location: SUSQUEHANNA
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts in excess of 31 knots were measured at Susquehanna Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 25-JUN-13 21:50:00 to 25-JUN-13 21:50:00 (EST-5)
Location: MILLER ISLAND
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 42 knots were measured at Hartmiller Island.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 25-JUN-13 21:58:00 to 25-JUN-13 21:58:00 (EST-5)
Location: SUSQUEHANNA
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 34 knots were measured at North Bay North East.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 25-JUN-13 22:00:00 to 25-JUN-13 22:00:00 (EST-5)
Location: PATAPSCO BUOY
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gusts of 37 knots were measured at Patpsco Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 25-JUN-13 22:00:00 to 25-JUN-13 22:06:00 (EST-5)
Location: BALTIMORE APPROACHES BUOY
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts of 35 knots were measured at Tolchester Beach.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUN-13 22:04:00 to 25-JUN-13 22:04:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts in excess of 33 knots were measured at Reagan National Airport.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 25-JUN-13 22:08:00 to 25-JUN-13 22:08:00 (EST-5)
Location: LYLES-CROUCH ACADEMY ALEXANDRIA
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 31 knots were measured at Alexandria.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 25-JUN-13 22:26:00 to 25-JUN-13 22:26:00 (EST-5)
Location: SANDY POINT
Magnitude: 34.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts in excess of 32 knots were measured at Stevenville.