Strong to severe thunderstorms formed ahead of a cold front producing gusty gale- to storm-force winds over much of the tidal Potomac River and the Maryland portion of the Chesapeake Bay and its adjoining tidal estuaries.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 15:32:00 to 04-MAY-21 15:32:00 (EST-5)
Location: QUANTICO (KNYG)
Magnitude: 34.00 EG
Reported by: ASOS

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near the ASOS at Quantico Marine Base.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 15:48:00 to 04-MAY-21 16:03:00 (EST-5)
Location: LEESYLVANIA STATE PARK (LSLVN)
Magnitude: 36.00 MG
Reported by: Buoy

Wind gusts of up to 36 knots (41 MPH) were measured by a buoy near Occoquan.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 04-MAY-21 16:04:00 to 04-MAY-21 16:04:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 40.00 MG
Reported by: ASOS

A wind gust of 40 knots (46 MPH) was measured by the ASOS at Ronald Reagan Washington National Airport.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 04-MAY-21 16:05:00 to 04-MAY-21 16:10:00 (EST-5)
Location: NATIONALS PARK (WSHNP)
Magnitude: 34.00 MG
Reported by: Mesonet

Wind gusts of up to 34 knots (39 MPH) were measured by a mesonet at Nationals Park.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 04-MAY-21 16:04:00 to 04-MAY-21 16:04:00 (EST-5)
Location: WEST POTOMAC HS (ALEXD)
Magnitude: 34.00 EG
Reported by: Mesonet

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near West Potomac High School in Alexandria adjacent to the upper tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 04-MAY-21 16:04:00 to 04-MAY-21 16:04:00 (EST-5)
Location: LYLES-CROUCH ACADEMY (AXDRA)
Magnitude: 34.00 MG
Reported by: Mesonet

A wind gust of 34 knots (39 MPH) was measured by a mesonet at Lyles-Crouch Academy in Alexandria adjacent to the upper tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 16:49:00 to 04-MAY-21 16:49:00 (EST-5)
Location: WASHINGTON DISTRICT COLONIAL BEACH (CLNLB)
Magnitude: 49.00 MG
Reported by: Mesonet

A wind gust of 49 knots (56 MPH) was measured by a mesonet at Washington District Colonial Beach.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 16:49:00 to 04-MAY-21 16:59:00 (EST-5)
Location: POTOMAC LIGHT 33 (LT3)
Magnitude: 35.00 MG
Reported by: Buoy

Wind gusts of up to 35 knots (40 MPH) were measured by a buoy near Potomac Light.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 16:50:00 to 04-MAY-21 17:00:00 (EST-5)
Location: BABER POINT (BAB)
Magnitude: 43.00 MG
Reported by: Buoy

Wind gusts of up to 43 knots (49 MPH) were measured by a buoy near Baber Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 04-MAY-21 16:50:00 to 04-MAY-21 16:50:00 (EST-5)
Location: HERRING BAY (HRB)
Magnitude: 34.00 EG
Reported by: Buoy

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near a buoy near Herring Bay.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 16:53:00 to 04-MAY-21 17:03:00 (EST-5)
Location: MONROE CREEK (MON)
Magnitude: 61.00 MG
Reported by: Buoy

Wind gusts of up to 61 knots (70 MPH) were measured by a buoy near Monroe Creek.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 16:54:00 to 04-MAY-21 16:54:00 (EST-5)
Location: BABER POINT (BAB)
Magnitude: 34.00 EG
Reported by: Buoy

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near a buoy near Dahlgren.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 16:56:00 to 04-MAY-21 17:06:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 54.00 MG
Reported by: Buoy

Wind gusts of up to 54 knots (62 MPH) were measured by a buoy near Cobb Island.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 16:57:00 to 04-MAY-21 17:02:00 (EST-5)
Location: BABER POINT (BAB)
Magnitude: 49.00 MG
Reported by: Buoy

Wind gusts of up to 49 knots (56 MPH) were measured by a buoy near Dahlgren.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-MAY-21 17:00:00 to 04-MAY-21 17:05:00 (EST-5)
Location: CUCKOLD CREEK (CCK)
Magnitude: 41.00 MG
Reported by: Buoy

Wind gusts of up to 41 knots (47 MPH) were measured by a buoy near Cuckold Creek.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 04-MAY-21 17:07:00 to 04-MAY-21 17:07:00 (EST-5)
Location: BLACKWALNUT HARBOR (BWH)
Magnitude: 34.00 EG
Reported by: Buoy

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near a buoy near Blackwalnut Harbor.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:24:00 to 04-MAY-21 17:30:00 (EST-5)
Location: PINEY POINT (PPTM2)
Magnitude: 39.00 MG
Reported by: Buoy

Wind gusts of up to 39 knots (45 MPH) were measured by a buoy near Piney Point.

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 04-MAY-21 17:30:00 to 04-MAY-21 17:36:00 (EST-5)
Location: SOLOMONS ISLAND (SLIM2)
Magnitude: 34.00 EG
Reported by: Buoy

A thunderstorm produced estimated wind gusts to 34 knots (39 MPH) near a buoy near Solomons Island.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 04-MAY-21 17:30:00 to 04-MAY-21 17:30:00 (EST-5)
Location: GOOSES REEF BUOY (44062)
Magnitude: 35.00 MG
Reported by: Buoy

A wind gust of 35 knots (40 MPH) was measured by a buoy near Gooses Reef.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:33:00 to 04-MAY-21 17:33:00 (EST-5)
Location: PATUXENT RIVER ASOS (KNHK)
Magnitude: 40.00 MG
Reported by: ASOS

A wind gust of 40 knots (46 MPH) was measured by the ASOS at Patuxent River Naval Air Station.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:34:00 to 04-MAY-21 17:34:00 (EST-5)
Location: ST INIGOES (KNUI)
Magnitude: 34.00 MG
Reported by: ASOS

A wind gust of 34 knots (39 MPH) was measured by the ASOS at Saint Inigoes.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 04-MAY-21 17:36:00 to 04-MAY-21 17:36:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 44.00 MG
Reported by: Buoy

A wind gust of 44 knots (51 MPH) was measured by a buoy near Cove Point.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:36:00 to 04-MAY-21 17:54:00 (EST-5)
Location: LEWISETTA MD (LWTV2)
Magnitude: 42.00 MG
Reported by: Buoy

Wind gusts of up to 42 knots (48 MPH) were measured by a buoy near Lewisetta.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 04-MAY-21 17:47:00 to 04-MAY-21 17:52:00 (EST-5)
Location: BLACKWALNUT HARBOR (BWH)
Magnitude: 35.00 MG
Reported by: Buoy

Wind gusts of up to 35 knots (40 MPH) were measured by a buoy near Blackwalnut Harbor.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:48:00 to 04-MAY-21 17:54:00 (EST-5)
Location: LEWISETTA (LWS)
Magnitude: 41.00 MG
Reported by: Buoy

Wind gusts of up to 41 knots (47 MPH) were measured by a buoy near Lewisetta.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:48:00 to 04-MAY-21 17:53:00 (EST-5)
Location: POINT LOOKOUT (PTL)
Magnitude: 34.00 MG
Reported by: Buoy

Wind gusts of up to 34 knots (39 MPH) were measured by a buoy near Point Lookout.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:49:00 to 04-MAY-21 17:54:00 (EST-5)
Location: LOWER HOOPER ISLAND (HPR)
Magnitude: 47.00 MG
Reported by: Buoy

Wind gusts of up to 47 knots (54 MPH) were measured by a buoy near Hooper Island.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 04-MAY-21 18:00:00 to 04-MAY-21 18:12:00 (EST-5)
Location: BISHOPS HEAD (BISM2)
Magnitude: 41.00 MG
Reported by: Buoy

Wind gusts of up to 41 knots (47 MPH) were measured by a buoy near Bishops Head.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 04-MAY-21 16:05:00 to 04-MAY-21 16:05:00 (EST-5)
Location: LONG BRANCH ES (ARLNL)
Magnitude: 36.00 MG
Reported by: Mesonet

A wind gust of 36 knots (41 MPH) was measured by a mesonet at Hoffman-Boston Elementary School in Arlington adjacent to the upper tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 04-MAY-21 17:08:00 to 04-MAY-21 17:13:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 35.00 MG
Reported by: Mesonet

A wind gust of 35 knots (40 MPH) was measured by a mesonet on Cobb Island adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 08-MAY-21 13:05:00 to 08-MAY-21 13:05:00 (EST-5)
Location: GEORGE WASHINGTON UNIVERSITY (GWUNI)
Magnitude: 34.00 EG
Reported by: Mesonet

A convective shower produced an estimated wind gust to 34 knots (39 MPH) near a mesonet near AGU in DC adjacent to the upper tidal Potomac River.

Marine Thunderstorm Wind in EASTERN BAY, ATLANTIC NORTH
From 08-MAY-21 13:20:00 to 08-MAY-21 13:31:00 (EST-5)
Location: US-50 (MD040)
Magnitude: 37.00 MG
Reported by: Mesonet

Wind gusts of up to 37 knots (43 MPH) were measured by a mesonet near Grasonville.