A strong cold front, driven by an unusually strong upper-level trough and wind shear, interacted with a hot, humid, and unstable airmass over the Mid-Atlantic. This pattern resulted in the formation of lines of thunderstorms and several supercells. The most widespread and significant wind damage was noted over northern Maryland, although pockets of considerable wind damage were noted over portions of northwestern Virginia and eastern West Virginia. Somewhat atypical for the Mid-Atlantic is late summer was the number of large hail reports, with multiple instances of giant hail noted.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 07-AUG-23 16:55:00 to 07-AUG-23 17:00:00 (EST-5)
Location: BALTIMORE INNER HARBOR (KDMH)
Magnitude: 44.00 MG
Reported by: Mesonet

Wind gusts of up to 44 knots (51 MPH) were measured by a Tempest station on East Randall Street adjacent to the tidal Patapsco River.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 07-AUG-23 17:00:00 to 07-AUG-23 17:00:00 (EST-5)
Location: BALTIMORE KEY BRIDGE (FSKM2)
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots (43 MPH) was measured by a mesonet at Baltimore Tower (MSI05) adjacent to the Patapsco River.

Marine Thunderstorm Wind in PATAPSCO RIVER INCLUDING BALTIMORE HARBOR, ATLANTIC NORTH
From 07-AUG-23 17:00:00 to 07-AUG-23 17:06:00 (EST-5)
Location: BALTIMORE KEY BRIDGE (FSKM2)
Magnitude: 34.00 EG
Reported by: Buoy

A thunderstorm produced estimated wind gusts to 34 knots (39 MPH) near the I-695 Francis Scott Key Bridge NOS sensor (FSKM2).

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 07-AUG-23 17:02:00 to 07-AUG-23 17:02:00 (EST-5)
Location: HART MILLER ISLAND (HRT)
Magnitude: 49.00 MG
Reported by: Buoy

Wind gusts of up to 49 knots (56 MPH) were measured by the Hart Miller WeatherFlow sensor (XHRT).

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 07-AUG-23 17:05:00 to 07-AUG-23 17:05:00 (EST-5)
Location: OCCOQUAN RIVER (OCC)
Magnitude: 34.00 EG
Reported by: Buoy

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near the Occoquan River WeatherFlow sensor (XOCC).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:14:00 to 07-AUG-23 17:22:00 (EST-5)
Location: SANDY POINT (SPT)
Magnitude: 34.00 EG
Reported by: Mesonet

A thunderstorm produced estimated wind gusts to 34 knots (39 MPH) near a mesonet near Annapolis (EW5391) adjacent to the Chesapeake Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:14:00 to 07-AUG-23 17:27:00 (EST-5)
Location: ANNAPOLIS (KNAK)
Magnitude: 36.00 MG
Reported by: ASOS

Wind gusts of up to 36 knots (41 MPH) were measured by the ASOS at the U.S. Naval Academy in Annapolis (KNAK) adjacent to the Chesapeake Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:16:00 to 07-AUG-23 17:56:00 (EST-5)
Location: GREENBURY POINT (GBY)
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of up to 38 knots (44 MPH) were measured by the Greenbury Point WeatherFlow sensor (XGBY).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:18:00 to 07-AUG-23 17:58:00 (EST-5)
Location: SANDY POINT SOUTH (NRSPS)
Magnitude: 42.00 MG
Reported by: Mesonet

Wind gusts of up to 42 knots (48 MPH) were measured by a mesonet at WPL Pier 31 (MD068).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:24:00 to 07-AUG-23 17:24:00 (EST-5)
Location: ANNAPOLIS MD (APAM2)
Magnitude: 36.00 MG
Reported by: Buoy

A wind gust of 36 knots (42 MPH) was measured by the Annapolis NOS sensor (APAM2).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:24:00 to 07-AUG-23 17:29:00 (EST-5)
Location: TOLLY POINT (TOL)
Magnitude: 35.00 MG
Reported by: Buoy

Wind gusts of up to 35 knots (40 MPH) were measured by the Tolly Point WeatherFlow sensor (XTOL).

Marine Thunderstorm Wind in CHESTER RIVER TO QUEENSTOWN MD, ATLANTIC NORTH
From 07-AUG-23 17:25:00 to 07-AUG-23 18:05:00 (EST-5)
Location: ROCK HALL ES (RKHAL)
Magnitude: 39.00 MG
Reported by: Mesonet

Wind gusts of up to 39 knots (45 MPH) were measured by a Tempest station at Huntingfield Point adjacent to the tidal Chester River.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:28:00 to 07-AUG-23 17:33:00 (EST-5)
Location: SANDY POINT (SPT)
Magnitude: 34.00 EG
Reported by: Buoy

A thunderstorm produced estimated wind gusts to 34 knots (39 MPH) near the Sandy Point WeatherFlow sensor (XSPT).

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 07-AUG-23 17:30:00 to 07-AUG-23 17:40:00 (EST-5)
Location: NORTH BAY BUOY (NB)
Magnitude: 39.00 MG
Reported by: Mesonet

Wind gusts of up to 39 knots (45 MPH) were measured by a Tempest station on Indian Field Court adjacent to the Chesapeake Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 17:41:00 to 07-AUG-23 17:46:00 (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 the Herring Bay WeatherFlow sensor (XHRB).

Marine Thunderstorm Wind in EASTERN BAY, ATLANTIC NORTH
From 07-AUG-23 18:00:00 to 07-AUG-23 18:00:00 (EST-5)
Location: US-50 (MD040)
Magnitude: 34.00 EG
Reported by: Mesonet

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near a mesonet at Crab Alley Bay adjacent to Eastern Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 07-AUG-23 18:08:00 to 07-AUG-23 18:29:00 (EST-5)
Location: KENT POINT MD (KPTM2)
Magnitude: 42.00 MG
Reported by: Mesonet

Wind gusts of up to 42 knots (48 MPH) were measured by a mesonet on the MD-33 Knapps Narrows Drawbridge (MD073).

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 07-AUG-23 18:30:00 to 07-AUG-23 18:30:00 (EST-5)
Location: GOOSES REEF BUOY (44062)
Magnitude: 47.00 MG
Reported by: Buoy

A wind gust of 47 knots (54 MPH) was measured by the Gooses Reef CBIBS sensor (44062).

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 07-AUG-23 18:37:00 to 07-AUG-23 18:42:00 (EST-5)
Location: MONROE CREEK (MON)
Magnitude: 49.00 MG
Reported by: Buoy

Wind gusts of up to 49 knots (56 MPH) were measured by the Monroe Creek WeatherFlow sensor (XMON).

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 07-AUG-23 18:40:00 to 07-AUG-23 18:45:00 (EST-5)
Location: CHOPTANK RIVER (CHOP)
Magnitude: 55.00 MG
Reported by: Mesonet

Wind gusts of up to 55 knots (63 MPH) were measured by a Tempest station in Oxford adjacent to the tidal Choptank River.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 07-AUG-23 18:49:00 to 07-AUG-23 18:54:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 44.00 MG
Reported by: Buoy

Wind gusts of up to 44 knots (51 MPH) were measured by the Cobb Point WeatherFlow sensor (XCOB).

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 07-AUG-23 18:56:00 to 07-AUG-23 18:59:00 (EST-5)
Location: QUANTICO (KNYG)
Magnitude: 49.00 MG
Reported by: AWOS

Wind gusts of up to 49 knots (56 MPH) were measured by the AWOS at Quantico Marine Base (KNYG) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 07-AUG-23 19:05:00 to 07-AUG-23 19:05:00 (EST-5)
Location: COBB POINT (COB)
Magnitude: 34.00 EG
Reported by: Mesonet

A thunderstorm produced an estimated wind gust to 34 knots (39 MPH) near a Tempest station on Waterside Drive.

Marine Thunderstorm Wind in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 07-AUG-23 19:05:00 to 07-AUG-23 19:05:00 (EST-5)
Location: COLES POINT (COL)
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots (43 MPH) was measured by a mesonet in Leonardtown (EW1760) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 07-AUG-23 19:15:00 to 07-AUG-23 19:15:00 (EST-5)
Location: HORN POINT LAB (HPLWS)
Magnitude: 37.00 MG
Reported by: Mesonet

A wind gust of 37 knots (43 MPH) was measured by a mesonet in Cambridge (GW0807) adjacent to the tidal Choptank River.

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 07-AUG-23 19:18:00 to 07-AUG-23 19:42:00 (EST-5)
Location: CAMBRIDGE (CAMM2)
Magnitude: 36.00 MG
Reported by: Buoy

Wind gusts of up to 36 knots (41 MPH) were measured by the Cambridge/Eaton Point Light NOS sensor (CAMM2).

Marine Thunderstorm Wind in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 07-AUG-23 19:18:00 to 07-AUG-23 19:24:00 (EST-5)
Location: SOLOMONS ISLAND (SLIM2)
Magnitude: 52.00 MG
Reported by: Buoy

Wind gusts of up to 52 knots (60 MPH) were measured by one of the Solomons Island NOS sensors (SLIM2).

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 07-AUG-23 19:19:00 to 07-AUG-23 19:29:00 (EST-5)
Location: CAMBRIDGE (CAMM2)
Magnitude: 41.00 MG
Reported by: Mesonet

Wind gusts of up to 41 knots (47 MPH) were measured by a mesonet on the US-50 Choptank River Bridge (MD004).

Marine Thunderstorm Wind in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 07-AUG-23 19:19:00 to 07-AUG-23 19:19:00 (EST-5)
Location: PATUXENT RIVER ASOS (KNHK)
Magnitude: 43.00 MG
Reported by: ASOS

A wind gust of 43 knots (49 MPH) was measured by the ASOS at Patuxent River Naval Air Station (KNHK) adjacent to the Chesapeake Bay and the tidal Patuxent River.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 07-AUG-23 19:40:00 to 07-AUG-23 19:40:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 36.00 MG
Reported by: Mesonet

A wind gust of 36 knots (41 MPH) was measured by a mesonet on Hoopers Island.

Marine Thunderstorm Wind in TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND, ATLANTIC NORTH
From 07-AUG-23 19:41:00 to 07-AUG-23 19:46:00 (EST-5)
Location: LOWER HOOPERS ISLAND (HPR)
Magnitude: 38.00 MG
Reported by: Buoy

Wind gusts of up to 38 knots (44 MPH) were measured by the Lower Hooper Island WeatherFlow sensor (XHPR).

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 07-AUG-23 21:20:00 to 07-AUG-23 21:20:00 (EST-5)
Location: CHOPTANK RIVER (CHOP)
Magnitude: 42.00 MG
Reported by: Mesonet

A wind gust of 42 knots (48 MPH) was measured by a Tempest station on Kim Drive adjacent to the tidal Choptank River.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 07-AUG-23 16:39:00 to 07-AUG-23 16:39:00 (EST-5)
Location: (KMTN)MARTIN STATE AIRPORT
Magnitude: 43.00 MG
Reported by: Mesonet

A wind gust of 43 knots (50 MPH) was measured by a mesonet at the intersection of MD-43 White Marsh Boulevard and MD-150 Eastern Boulevard (MD063) adjacent to the Chesapeake Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 07-AUG-23 16:43:00 to 07-AUG-23 16:48:00 (EST-5)
Location: SENECA CREEK
Magnitude: 39.00 MG
Reported by: Buoy

Wind gusts of up to 39 knots (45 MPH) were measured by the Seneca Creek WeatherFlow sensor (XSNC).

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 07-AUG-23 16:49:00 to 07-AUG-23 17:00:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 45.00 MG
Reported by: ASOS

Wind gusts of up to 45 knots (52 MPH) were measured by the ASOS at Ronald Reagan Washington National Airport (KDCA) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 07-AUG-23 16:45:00 to 07-AUG-23 16:45:00 (EST-5)
Location: (KMTN)MARTIN STATE AIRPORT
Magnitude: 45.00 MG
Reported by: AWOS

A wind gust of 45 knots (52 MPH) was measured by the AWOS at Martin State Airport (KMTN) adjacent to the Chesapeake Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 07-AUG-23 16:54:00 to 07-AUG-23 16:59:00 (EST-5)
Location: GROVE POINT (GVP)
Magnitude: 43.00 MG
Reported by: Buoy

Wind gusts of up to 43 knots (49 MPH) were measured by the Grove Point WeatherFlow sensor (XGVP).

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 07-AUG-23 16:54:00 to 07-AUG-23 17:19:00 (EST-5)
Location: UPPER POTOMAC BUOY (44061)
Magnitude: 35.00 MG
Reported by: Mesonet

Wind gusts of up to 35 knots (40 MPH) were measured by a mesonet at the I-95/I-495 Capital Beltway and I-295 interchange (MD062) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 07-AUG-23 16:55:00 to 07-AUG-23 17:12:00 (EST-5)
Location: QUANTICO (KNYG)
Magnitude: 43.00 MG
Reported by: AWOS

Wind gusts of up to 43 knots (49 MPH) were measured by the AWOS at Quantico Marine Base (KNYG) adjacent to the tidal Potomac River.