Plenty of moisture continued to rotate around high pressure over the southeastern Conus. Hot conditions combined with the moisture to cause moderate amounts of instability to develop. The instability combined with forcing from a surface trough to trigger showers and thunderstorms during the afternoon and evening hours. The moderate instability caused some thunderstorms to produce gusty winds and large hail.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 09-JUN-11 19:24:00 to 09-JUN-11 19:24:00 (EST-5)
Location: RIVIERA BEACH
Magnitude: 34.00 MG
Reported by: Buoy

A wind gust of 34 knots was measured at Key Bridge.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-JUN-11 22:30:00 to 09-JUN-11 22:30:00 (EST-5)
Location: ANNAPOLIS
Magnitude: 34.00 EG
Reported by: Buoy

A wind gust in excess of 30 knots was reported at the Annapolis Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-JUN-11 22:40:00 to 09-JUN-11 22:40:00 (EST-5)
Location: TOLLY POINT
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported at Tolly Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-JUN-11 23:06:00 to 09-JUN-11 23:06:00 (EST-5)
Location: TOLLY POINT
Magnitude: 38.00 MG
Reported by: Mesonet

A wind gust of 38 knots was reported at Tolly Point.

Marine Hail in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-JUN-11 22:30:00 to 09-JUN-11 22:30:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 0.88 
Reported by: Public

Nickel sized hail was reported near Highland Beach.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-JUN-11 22:50:00 to 09-JUN-11 23:05:00 (EST-5)
Location: QUANTICO
Magnitude: 36.00 MG
Reported by: ASOS

A wind gust of 36 knots was reported at Quantico.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 09-JUN-11 23:31:00 to 09-JUN-11 23:31:00 (EST-5)
Location: CUCKOLD CREEK
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported at Cuckold Creek.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 09-JUN-11 19:30:00 to 09-JUN-11 19:30:00 (EST-5)
Location: MARYLAND SCIENCE CENTER
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported at the Federal Hill Elementary School.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 09-JUN-11 19:34:00 to 09-JUN-11 19:34:00 (EST-5)
Location: BALTIMORE CITY
Magnitude: 34.00 EG
Reported by: Mesonet

A wind gust in excess of 30 knots was reported at the Hampstead Elementary School.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 09-JUN-11 19:50:00 to 09-JUN-11 19:58:00 (EST-5)
Location: MARTIN STATE AIRPORT
Magnitude: 42.00 MG
Reported by: Mesonet

Wind gusts up to 42 knots were measured at Miller Island.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 09-JUN-11 19:54:00 to 09-JUN-11 20:06:00 (EST-5)
Location: BALTIMORE APPROACHES BUOY
Magnitude: 56.00 MG
Reported by: Mesonet

Wind gust up to 56 knots were reported at Tolchester Beach.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-JUN-11 22:59:00 to 10-JUN-11 00:31:00 (EST-5)
Location: STEVENSVILLE
Magnitude: 40.00 MG
Reported by: AWOS

Wind gusts up to 40 knots were reported at Stevensville.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-JUN-11 23:01:00 to 09-JUN-11 23:01:00 (EST-5)
Location: STEVENSVILLE
Magnitude: 34.00 EG
Reported by: Mesonet

Wind gusts in excess of 30 knots were reported at Sandy Point.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 09-JUN-11 19:40:00 to 09-JUN-11 19:40:00 (EST-5)
Location: BALTIMORE CITY
Magnitude: 52.00 EG
Reported by: Trained Spotter

Wind gusts were estimated to be around 60 mph.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 09-JUN-11 23:00:00 to 09-JUN-11 23:00:00 (EST-5)
Location: THOMAS POINT LIGHT
Magnitude: 44.00 MG
Reported by: Buoy

A wind gust of 44 knots was reported at Thomas Point Lighthouse.