A cold front intersected an extremely unstable airmass. The result was numerous strong to severe thunderstorms containing damaging wind gusts and some hail.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 13-AUG-21 16:18:00 to 13-AUG-21 16:42:00 (EST-5)
Location: BALTIMORE KEY BRIDGE (FSKM2)
Magnitude: 39.00 MG
Reported by: Buoy

Wind gusts of up to 39 knots (45 MPH) were measured by a buoy near Francis Scott Key Bridge.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 13-AUG-21 16:09:00 to 13-AUG-21 16:09:00 (EST-5)
Location: ORIOLE PARK AT CAMDEN YARDS (BLTPC)
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots (43 MPH) was measured by a mesonet at Oriole Park at Camden Yards adjacent to Baltimore Inner Harbor.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 13-AUG-21 16:14:00 to 13-AUG-21 16:14:00 (EST-5)
Location: HAMPSTEAD HILL ACADEMY (BLMHH)
Magnitude: 34.00 EG
Reported by: Mesonet

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near a mesonet at Hampstead Hill Academy adjacent to Baltimore Inner Harbor.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 13-AUG-21 16:18:00 to 13-AUG-21 16:18:00 (EST-5)
Location: BALTIMORE KEY BRIDGE (FSKM2)
Magnitude: 38.00 MG
Reported by: Mesonet

A wind gust of 38 k nots (44 MPH) was measured by a mesonet on I-695 Francis Scott Key Bridge.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 13-AUG-21 16:30:00 to 13-AUG-21 16:36:00 (EST-5)
Location: BALTIMORE (BLTM2)
Magnitude: 35.00 MG
Reported by: Buoy

Wind gusts of up to 35 knots (40 MPH) were measured by a buoy in Baltimore Inner Harbor.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 13-AUG-21 16:35:00 to 13-AUG-21 16:35:00 (EST-5)
Location: ORIOLE PARK AT CAMDEN YARDS (BLTPC)
Magnitude: 38.00 MG
Reported by: Buoy

A wind gust of 38 knots (44 MPH) was measured by a mesonet at Oriole Park at Camden Yards adjacent to Baltimore Inner Harbor.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 13-AUG-21 16:52:00 to 13-AUG-21 16:52:00 (EST-5)
Location: SUSQUEHANNA RIVER BUOY (44057)
Magnitude: 39.00 MG
Reported by: Mesonet

A wind gust of 39 knots (45 MPH) was measured by a mesonet on US-40 Hatem Bridge.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 16:54:00 to 13-AUG-21 16:59:00 (EST-5)
Location: QUANTICO (KNYG)
Magnitude: 45.00 MG
Reported by: ASOS

Wind gusts of up to 45 knots (52 MPH) were measured by the ASOS at Quantico Marine Base (KNYG) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 13-AUG-21 16:55:00 to 13-AUG-21 16:55:00 (EST-5)
Location: HART MILLER ISLAND (HRT)
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:01:00 to 13-AUG-21 17:01:00 (EST-5)
Location: GREENBURY POINT (GBY)
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:03:00 to 13-AUG-21 17:23:00 (EST-5)
Location: ANNAPOLIS (KNAK)
Magnitude: 36.00 MG
Reported by: Mesonet

Wind gusts of up to 36 knots (41 MPH) were measured by a mesonet on the US-50/US-301 Chesapeake Bay Bridge.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:10:00 to 13-AUG-21 17:20:00 (EST-5)
Location: THOMAS POINT (TPLM2)
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of up to 38 knots (44 MPH) were measured by a buoy near Saunders Point Light.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 13-AUG-21 17:11:00 to 13-AUG-21 17:11:00 (EST-5)
Location: GROVE POINT (GVP)
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 17:24:00 to 13-AUG-21 17:24:00 (EST-5)
Location: WASHINGTON DISTRICT COLONIAL BEACH (CLNLB)
Magnitude: 34.00 EG
Reported by: Mesonet

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near a mesonet on Colonial Beach.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:28:00 to 13-AUG-21 17:28:00 (EST-5)
Location: TOLLY POINT (TOL)
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:29:00 to 13-AUG-21 17:29:00 (EST-5)
Location: THOMAS POINT (TPLM2)
Magnitude: 46.00 MG
Reported by: Buoy

A wind gust of 46 knots (53 MPH) was measured by a buoy near Thomas Point.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:33:00 to 13-AUG-21 17:48:00 (EST-5)
Location: HERRING BAY (HRB)
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:35:00 to 13-AUG-21 18:10:00 (EST-5)
Location: KENT POINT MD (KPTM2)
Magnitude: 44.00 MG
Reported by: Mesonet

Wind gusts of up to 44 knots (51 MPH) were measured by a mesonet on MD-33 Knapps Narrows Drawbridge.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 17:40:00 to 13-AUG-21 17:40:00 (EST-5)
Location: THOMAS POINT (TPLM2)
Magnitude: 42.00 MG
Reported by: Buoy

A wind gust of 42 knots (48 MPH) was measured by a buoy near Saunders Point Light.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 13-AUG-21 17:41:00 to 13-AUG-21 17:41:00 (EST-5)
Location: BLACKWALNUT HARBOR (BWH)
Magnitude: 35.00 MG
Reported by: Buoy

A wind gust of 35 knots (40 MPH) was measured by a buoy in Blackwalnut Harbor.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 17:43:00 to 13-AUG-21 17:58:00 (EST-5)
Location: POTOMAC LIGHT 33 (LT3)
Magnitude: 55.00 MG
Reported by: Buoy

Wind gusts of up to 55 knots (63 MPH) were measured by a buoy near Potomac Light.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 17:43:00 to 13-AUG-21 18:08:00 (EST-5)
Location: CUCKOLD CREEK (CCK)
Magnitude: 55.00 MG
Reported by: Buoy

Wind gusts of up to 55 knots (63 MPH) were measured by a buoy near Cuckold Creek.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 17:47:00 to 13-AUG-21 17:52:00 (EST-5)
Location: BABER POINT (BAB)
Magnitude: 36.00 MG
Reported by: Buoy

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

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 17:47:00 to 13-AUG-21 17:52:00 (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 Dahlgren.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 17:47:00 to 13-AUG-21 17:57:00 (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 13-AUG-21 17:48:00 to 13-AUG-21 17:48:00 (EST-5)
Location: BABER POINT (BAB)
Magnitude: 38.00 MG
Reported by: Buoy

A wind gust of 38 knots (44 MPH) was measured by a buoy near Dahlgren.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 13-AUG-21 17:49:00 to 13-AUG-21 18:04:00 (EST-5)
Location: MONROE CREEK (MON)
Magnitude: 45.00 MG
Reported by: Buoy

Wind gusts of up to 45 knots (52 MPH) were measured by a buoy near Monroe Creek.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 13-AUG-21 17:54:00 to 13-AUG-21 18:04:00 (EST-5)
Location: GOOSES REEF BUOY (44062)
Magnitude: 52.00 MG
Reported by: Buoy

Wind gusts of up to 52 knots (60 MPH) were measured by a buoy near Gooses Reef.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 17:58:00 to 13-AUG-21 18:08:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of up to 38 knots (44 MPH) were measured by a buoy near Cobb Point.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 13-AUG-21 18:01:00 to 13-AUG-21 18:46:00 (EST-5)
Location: BLACKWALNUT HARBOR (BWH)
Magnitude: 45.00 MG
Reported by: Buoy

Wind gusts of up to 45 knots (52 MPH) were measured by a buoy in Blackwalnut Harbor.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 13-AUG-21 18:03:00 to 13-AUG-21 18:18:00 (EST-5)
Location: HERRING BAY (HRB)
Magnitude: 51.00 MG
Reported by: Buoy

Wind gusts of up to 51 knots (59 MPH) were measured by a buoy in Herring Bay.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 13-AUG-21 18:05:00 to 13-AUG-21 18:05:00 (EST-5)
Location: CHOPTANK RIVER (CHOP)
Magnitude: 34.00 MG
Reported by: Mesonet

A wind gust of 34 knots (39 MPH) was measured by a mesonet on Kim Drive adjacent to the tidal Choptank River.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 18:16:00 to 13-AUG-21 18:16:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 36.00 MG
Reported by: Mesonet

A wind gust of 36 knots (41 MPH) was measured by a mesonet near Leonardtown adjacent to the lower tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 18:24:00 to 13-AUG-21 18:36:00 (EST-5)
Location: LEWISETTA MD (LWTV2)
Magnitude: 37.00 MG
Reported by: Buoy

Wind gusts of up to 37 knots (42 MPH) were measured by a buoy near Lewisetta.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 18:24:00 to 13-AUG-21 18:42:00 (EST-5)
Location: PINEY POINT (PPTM2)
Magnitude: 43.00 MG
Reported by: Buoy

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

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 13-AUG-21 18:24:00 to 13-AUG-21 18:36:00 (EST-5)
Location: SOLOMONS ISLAND (SLIM2)
Magnitude: 42.00 MG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 18:29:00 to 13-AUG-21 18:29:00 (EST-5)
Location: PATUXENT RIVER ASOS (KNHK)
Magnitude: 41.00 MG
Reported by: ASOS

A wind gust of 41 knots (47 MPH) was measured by the ASOS at Patuxent River Naval Air Station (KNHK) adjacent to the Chesapeake Bay and tidal Patuxent River.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 13-AUG-21 18:30:00 to 13-AUG-21 18:36:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 35.00 MG
Reported by: Buoy

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

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 13-AUG-21 18:30:00 to 13-AUG-21 18:30:00 (EST-5)
Location: SOLOMONS ISLAND (SLIM2)
Magnitude: 39.00 MG
Reported by: Buoy

A wind gust of 39 knots (45 MPH) was measured by a buoy near Solomons Island.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 18:35:00 to 13-AUG-21 18:35:00 (EST-5)
Location: ST INIGOES (KNUI)
Magnitude: 36.00 MG
Reported by: ASOS

A wind gust of 36 knots (41 MPH) was measured by the ASOS at Saint Inigoes (KNUI) adjacent to the lower tidal Potomac River.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 18:39:00 to 13-AUG-21 18:49:00 (EST-5)
Location: POINT LOOKOUT (PTL)
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of up to 38 knots (44 MPH) were measured by a buoy near Point Lookout.

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 13-AUG-21 18:44:00 to 13-AUG-21 19:14:00 (EST-5)
Location: LOWER HOOPER ISLAND (HPR)
Magnitude: 51.00 MG
Reported by: Buoy

Wind gusts of up to 44 knots (51 MPH) were measured by a buoy near Lower Hooper Island.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 13-AUG-21 18:54:00 to 13-AUG-21 19:06:00 (EST-5)
Location: CAMBRIDGE (CAMM2)
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of up to 38 knots (44 MPH) were measured by a buoy near Cambridge.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 13-AUG-21 18:54:00 to 13-AUG-21 19:24:00 (EST-5)
Location: BISHOPS HEAD (BISM2)
Magnitude: 46.00 MG
Reported by: Buoy

Wind gusts of up to 46 knots (53 MPH) were measured by a buoy near Bishops Head Pier.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 13-AUG-21 19:00:00 to 13-AUG-21 19:00:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 37.00 MG
Reported by: Buoy

A wind gust of 37 knots (42 MPH) was measured by a buoy near Cove Point.

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 13-AUG-21 19:00:00 to 13-AUG-21 19:25:00 (EST-5)
Location: DOWELL ES (LSBY2)
Magnitude: 38.00 MG
Reported by: Mesonet

Wind gusts of up to 38 knots (44 MPH) were measured by a mesonet on US-50 at the Choptank River.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 13-AUG-21 19:14:00 to 13-AUG-21 19:34:00 (EST-5)
Location: RACCOON POINT (RAC)
Magnitude: 40.00 MG
Reported by: Buoy

Wind gusts of up to 40 knots (46 MPH) were measured by a buoy near Raccoon Point.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 13-AUG-21 19:20:00 to 13-AUG-21 19:30:00 (EST-5)
Location: CRISFIELD CG (CRS)
Magnitude: 36.00 MG
Reported by: Buoy

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