Cutoff low pressure was over the Ohio Valley. Another area of low pressure strengthened overhead on the occluded boundary. Warm and moist air from the south lead to an unstable atmosphere. Strong shear profiles were in place due to the cutoff low to the west. Strong lift associated with the developing low combined with strong shear and enough instability to produce severe thunderstorms.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 06-APR-17 13:45:00 to 06-APR-17 13:55:00 (EST-5)
Location: GUNPOWDER (GUN)
Magnitude: 54.00 MG
Reported by: Buoy

Wind gusts of 48 to 54 knots were reported at Gunpowder.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 06-APR-17 13:26:00 to 06-APR-17 13:36:00 (EST-5)
Location: SANDY POINT (SPT)
Magnitude: 53.00 MG
Reported by: Buoy

Wind gusts of 34 to 53 knots were reported at Sandy Point.

Marine Thunderstorm Wind in CHESTER RIVER TO QUEENSTOWN MD, ATLANTIC NORTH
From 06-APR-17 13:36:00 to 06-APR-17 13:36:00 (EST-5)
Location: BAYSIDE ES (STVVL)
Magnitude: 50.00 EG
Reported by: Unknown

A wind gust around 50 knots was estimated based on thunderstorm wind damage nearby.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 06-APR-17 13:30:00 to 06-APR-17 13:30:00 (EST-5)
Location: PATAPSCO BUOY (44043)
Magnitude: 45.00 MG
Reported by: Buoy

A wind gust of 45 knots was reported at the Patapsco Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 06-APR-17 13:33:00 to 06-APR-17 13:38:00 (EST-5)
Location: HART MILLER ISLAND (HRT)
Magnitude: 53.00 MG
Reported by: Buoy

Wind gusts of 34 to 53 knots were reported at Hartmiller Island.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 06-APR-17 13:36:00 to 06-APR-17 13:38:00 (EST-5)
Location: TOLCHESTER MD (TCBM2)
Magnitude: 42.00 MG
Reported by: Buoy

Wind gusts of 38 to 42 knots were reported at Tolchester.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 06-APR-17 11:41:00 to 06-APR-17 11:46:00 (EST-5)
Location: LOWER HOOPERS ISLAND (HPR)
Magnitude: 48.00 MG
Reported by: Buoy

Wind gusts of 35 to 48 knots were reported at Hooper Island.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 06-APR-17 11:30:00 to 06-APR-17 11:35:00 (EST-5)
Location: POINT LOOKOUT (PTL)
Magnitude: 53.00 MG
Reported by: Buoy

Wind gusts of 36 to 53 knots were reported at Point Lookout.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 06-APR-17 15:18:00 to 06-APR-17 15:18:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 41.00 MG
Reported by: Buoy

A wind gust of 41 knots was reported at Cobb Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 06-APR-17 13:45:00 to 06-APR-17 13:45:00 (EST-5)
Location: (KMTN)MARTIN STATE AIRPORT
Magnitude: 37.00 MG
Reported by: AWOS

A wind gust of 37 knots was reported at Martin State.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 06-APR-17 13:51:00 to 06-APR-17 13:51:00 (EST-5)
Location: WEIDE MD (KEDG)
Magnitude: 56.00 MG
Reported by: Unknown

A wind gust of 56 knots was reported based on thunderstorm wind damage nearby.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 06-APR-17 13:54:00 to 06-APR-17 13:54:00 (EST-5)
Location: GROVE POINT (GVP)
Magnitude: 51.00 MG
Reported by: Buoy

A wind gust of 51 knots was reported at Grove Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 06-APR-17 14:00:00 to 06-APR-17 14:00:00 (EST-5)
Location: SUSQUEHANNA RIVER BUOY (44057)
Magnitude: 39.00 MG
Reported by: Buoy

Wind gusts of 37 to 39 knots were reported at the Susquehanna River Buoy.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 06-APR-17 14:05:00 to 06-APR-17 14:05:00 (EST-5)
Location: NORTH BAY NORTH EAST MD (NRTBY)
Magnitude: 58.00 MG
Reported by: Buoy

A wind gust of 58 knots was reported at North Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 06-APR-17 14:00:00 to 06-APR-17 14:00:00 (EST-5)
Location: GROVE POINT (GVP)
Magnitude: 60.00 MG
Reported by: Buoy

A wind gust of 60 knots was reported about 3 miles south of the Aberdeen Proving Ground.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 06-APR-17 15:50:00 to 06-APR-17 15:50:00 (EST-5)
Location: GOOSES REEF BUOY (44062)
Magnitude: 35.00 MG
Reported by: Buoy

A wind gust of 35 knots was reported at Gooses Reef.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 16:42:00 to 06-APR-17 16:42:00 (EST-5)
Location: QUANTICO (KNYG)
Magnitude: 34.00 MG
Reported by: AWOS

A wind gust of 34 knots was reported at Quantico.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 06-APR-17 12:44:00 to 06-APR-17 12:49:00 (EST-5)
Location: NATIONALS PARK (WSHNP)
Magnitude: 45.00 MG
Reported by: Mesonet

Wind gusts of 36 to 45 knots were reported at Nationals Park.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 06-APR-17 12:48:00 to 06-APR-17 12:48:00 (EST-5)
Location: WASHINGTON DC (WASD2)
Magnitude: 35.00 MG
Reported by: Mesonet

A wind gust of 35 knots was reported.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 06-APR-17 12:54:00 to 06-APR-17 12:54:00 (EST-5)
Location: PINEY POINT (PPTM2)
Magnitude: 38.00 MG
Reported by: Buoy

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

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 06-APR-17 13:36:00 to 06-APR-17 13:48:00 (EST-5)
Location: HAMPSTEAD HILL ACADEMY (BLMHH)
Magnitude: 45.00 MG
Reported by: Mesonet

Wind gusts of 34 to 45 knots were reported.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 14:45:00 to 06-APR-17 15:00:00 (EST-5)
Location: BABAR POINT (BAB)
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of 34 to 38 knots were reported at Baber Point.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 15:02:00 to 06-APR-17 15:02:00 (EST-5)
Location: CUCKOLD CREEK (CCK)
Magnitude: 36.00 MG
Reported by: Buoy

A wind gust of 36 knots was reported at Cuckold Creek.

Waterspout in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 06-APR-17 12:43:00 to 06-APR-17 12:44:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Reported by: Other Federal Agency

A water spout was on video.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 06-APR-17 11:49:00 to 06-APR-17 12:24:00 (EST-5)
Location: RACCOON POINT (RAC)
Magnitude: 40.00 MG
Reported by: Buoy

Wind gusts of 34 to 40 knots were reported at Racoon Point.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 06-APR-17 11:50:00 to 06-APR-17 12:05:00 (EST-5)
Location: CRISFIELD FIRE DEPARTMENT (CRSFL)
Magnitude: 38.00 MG
Reported by: Mesonet

Wind gusts of 36 to 38 knots were reported at Crisfield.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 12:12:00 to 06-APR-17 12:12:00 (EST-5)
Location: QUANTICO (KNYG)
Magnitude: 44.00 MG
Reported by: AWOS

A wind gust of 44 knots was reported at Quantico.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 12:19:00 to 06-APR-17 12:24:00 (EST-5)
Location: LEESYLVANIA STATE PARK (LSLVN)
Magnitude: 41.00 MG
Reported by: Buoy

Wind gusts of 39 to 41 knots were reported at Occoquon.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 12:20:00 to 06-APR-17 12:33:00 (EST-5)
Location: BABAR POINT (BAB)
Magnitude: 43.00 MG
Reported by: Buoy

Wind gusts of 34 to 43 knots were reported at Baber Creek, Tower 70, Pylons DAH, and Potomac Light 33.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 12:33:00 to 06-APR-17 12:38:00 (EST-5)
Location: MONROE CREEK (MON)
Magnitude: 50.00 MG
Reported by: Buoy

Wind gusts of 35 to 50 knots were reported at Monroe Creek.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 12:37:00 to 06-APR-17 12:37:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 36.00 MG
Reported by: Buoy

A wind gust of 36 knots was reported at Cuckold Creek.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 06-APR-17 12:38:00 to 06-APR-17 12:48:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 42.00 MG
Reported by: Buoy

Wind gusts of 36 to 42 knots were reported at Cobb Point.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 06-APR-17 12:44:00 to 06-APR-17 12:44:00 (EST-5)
Location: LONG BRANCH ES (ARLNL)
Magnitude: 35.00 MG
Reported by: Mesonet

A wind gust of 35 knots was reported at Hoffman-Boston Elementary School.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 06-APR-17 13:06:00 to 06-APR-17 13:16:00 (EST-5)
Location: HERRING BAY (HRB)
Magnitude: 43.00 MG
Reported by: Buoy

Wind gusts of 36 to 43 knots were reported at Herring Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 06-APR-17 13:14:00 to 06-APR-17 13:27:00 (EST-5)
Location: GREENBERRY POINT (GBY)
Magnitude: 48.00 MG
Reported by: Buoy

Wind gusts of 36 to 48 knots were reported at Greenberry Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 06-APR-17 13:18:00 to 06-APR-17 13:18:00 (EST-5)
Location: GOOSES REEF BUOY (44062)
Magnitude: 49.00 MG
Reported by: Buoy

A wind gust of 49 knots was reported at  Blackwalnut Harbor.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 06-APR-17 13:20:00 to 06-APR-17 13:20:00 (EST-5)
Location: THOMAS POINT (TPLM2)
Magnitude: 48.00 MG
Reported by: Buoy

A wind gust of 48 knots was reported at Thomas Point Lighthouse.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 06-APR-17 13:21:00 to 06-APR-17 13:21:00 (EST-5)
Location: TOLLY POINT (TOL)
Magnitude: 35.00 MG
Reported by: Buoy

A wind gust of 35 knots was reported at Tolly Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 06-APR-17 13:23:00 to 06-APR-17 13:23:00 (EST-5)
Location: KENT ISLAND (KNT)
Magnitude: 38.00 MG
Reported by: Buoy

A wind gust of 38 knots was reported at Kent Island.