A line of thunderstorms (Mesoscale Convective Complex, MCS) that developed over the Midwest moved across the waters during the early morning hours. The event was noteworthy due to its timing.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 21-JUL-23 03:00:00 to 21-JUL-23 03:00:00 (EST-5)
Location: GEORGE WASHINGTON UNIVERSITY (GWUNI)
Magnitude: 34.00 EG
Reported by: Mesonet

A squall produced an estimated wind gust to 34 knots (39 MPH) near a mesonet at the George Washington University Foggy Bottom Campus (1852W) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 21-JUL-23 03:01:00 to 21-JUL-23 03:01:00 (EST-5)
Location: OCCOQUAN RIVER (OCC)
Magnitude: 34.00 EG
Reported by: Buoy

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

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 21-JUL-23 03:02:00 to 21-JUL-23 03:02:00 (EST-5)
Location: QUANTICO (KNYG)
Magnitude: 34.00 EG
Reported by: AWOS

A squall produced an estimated wind gust to 34 knots (39 MPH) near the AWOS at Quantico Marine Base (KNYG) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:36:00 to 21-JUL-23 03:42:00 (EST-5)
Location: ANNAPOLIS MD (APAM2)
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced estimated wind gusts to 34 knots (39 MPH) near the Annapolis NOS sensor (APAM2).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:37:00 to 21-JUL-23 03:52:00 (EST-5)
Location: SANDY POINT SOUTH (NRSPS)
Magnitude: 34.00 EG
Reported by: Mesonet

A squall produced estimated wind gusts of up to 34 knots (39 MPH) near a mesonet at WPL Pier 31 (MD068).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:38:00 to 21-JUL-23 03:40:00 (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 Annapolis U.S. Naval Academy (KNAK) adjacent to the Chesapeake Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:39:00 to 21-JUL-23 03:54:00 (EST-5)
Location: TOLLY POINT (TOL)
Magnitude: 44.00 MG
Reported by: Buoy

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

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:42:00 to 21-JUL-23 03:42:00 (EST-5)
Location: ANNAPOLIS BUOY (44063)
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced an estimated wind gust to 34 knots (39 MPH) near the Annapolis CBIBS sensor (44063).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:44:00 to 21-JUL-23 03:54:00 (EST-5)
Location: SAUNDERS POINT LIGHT
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced estimated wind gusts to 34 knots (39 MPH) near the Saunders Point Light WeatherFlow sensor (XMTR).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:45:00 to 21-JUL-23 03:45:00 (EST-5)
Location: SHADY SIDE ES (SHADY)
Magnitude: 39.00 MG
Reported by: Mesonet

A wind gust of 39 knots (45 MPH) was measured by a mesonet in Galesville (EW0112) adjacent to the Chesapeake Bay.

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:46:00 to 21-JUL-23 03:46:00 (EST-5)
Location: THOMAS POINT (TPLM2)
Magnitude: 35.00 MG
Reported by: Buoy

A wind gust of 35 knots (40 MPH) was measured by the Thomas Point NOS sensor (TPLM2).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:46:00 to 21-JUL-23 03:56:00 (EST-5)
Location: GREENBURY POINT (GBY)
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced estimated wind gusts to 34 knots (39 MPH) near the Greenbury Point WeatherFlow sensor (XGBY).

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 21-JUL-23 03:50:00 to 21-JUL-23 04:20:00 (EST-5)
Location: POTOMAC LIGHT 33 (LT3)
Magnitude: 34.00 MG
Reported by: Buoy

Wind gusts of up to 34 knots (39 MPH) were measured by the Potomac Light 33 WeatherFlow sensor (XLT3).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 03:52:00 to 21-JUL-23 03:52:00 (EST-5)
Location: HERRING BAY (HRB)
Magnitude: 34.00 MG
Reported by: Buoy

A wind gust of 34 knots (39 MPH) was measured by the Herring Bay WeatherFlow sensor (XHRB).

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 21-JUL-23 04:06:00 to 21-JUL-23 04:06:00 (EST-5)
Location: BABER POINT (BAB)
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced an estimated wind gust to 34 knots (39 MPH) near the Baber Point WeatherFlow sensor (XBAB).

Marine Thunderstorm Wind in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 21-JUL-23 04:08:00 to 21-JUL-23 04:08:00 (EST-5)
Location: MONROE CREEK (MON)
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced an estimated wind gust to 34 knots (39 MPH) near the Monroe Creek WeatherFlow sensor (XMON).

Marine Thunderstorm Wind in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 21-JUL-23 04:10:00 to 21-JUL-23 04:19:00 (EST-5)
Location: KENT POINT MD (KPTM2)
Magnitude: 35.00 MG
Reported by: Mesonet

Wind gusts of up to 35 knots (40 MPH) were measured by a mesonet on the MD-33 Knapps Narrows Drawbridge (MD073) adjacent to the Chesapeake Bay and tidal Choptank River.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 21-JUL-23 04:15:00 to 21-JUL-23 04:15:00 (EST-5)
Location: ROD N REEL CHESAPEAKE BEACH (CHSRL)
Magnitude: 34.00 EG
Reported by: Mesonet

A squall produced an estimated wind gust to 34 knots (39 MPH) near a Tempest station on Island Club Road adjacent to the tidal Choptank River.

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 21-JUL-23 04:18:00 to 21-JUL-23 04:30:00 (EST-5)
Location: GOOSES REEF BUOY (44062)
Magnitude: 37.00 MG
Reported by: Buoy

Wind gusts of up to 37 knots (43 MPH) were measured by the Gooses Reef CBIBS sensor (44062).

Marine Thunderstorm Wind in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 21-JUL-23 04:18:00 to 21-JUL-23 04:18:00 (EST-5)
Location: BLACKWALNUT HARBOR (BWH)
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced an estimated wind gust to 34 knots (39 MPH) near the Blackwalnut Harbor WeatherFlow sensor (XBWH).

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 21-JUL-23 04:42:00 to 21-JUL-23 04:45:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced estimated wind gusts to 34 knots (39 MPH) near the Cove Point NOS sensor (COVM2).

Marine Thunderstorm Wind in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 21-JUL-23 05:01:00 to 21-JUL-23 05:01:00 (EST-5)
Location: MID BAY BUOY
Magnitude: 47.00 MG
Reported by: Mesonet

A wind gust of 47 knots (54 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 21-JUL-23 05:16:00 to 21-JUL-23 05:16:00 (EST-5)
Location: LOWER HOOPERS ISLAND (HPR)
Magnitude: 34.00 EG
Reported by: Buoy

A squall produced an estimated wind gust to 34 knots (39 MPH) near the Lower Hooper Island WeatherFlow sensor (XHPR).

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 21-JUL-23 02:52:00 to 21-JUL-23 03:07:00 (EST-5)
Location: (DCA)REAGAN NATIONAL AIRPORT
Magnitude: 41.00 MG
Reported by: ASOS

Wind gusts of up to 41 knots (47 MPH) were measured by the ASOS at Ronald Reagan Washington National Airport (KDCA) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 21-JUL-23 02:55:00 to 21-JUL-23 02:55:00 (EST-5)
Location: GEORGE MASON ES (ALXD2)
Magnitude: 34.00 EG
Reported by: Mesonet

A squall produced an estimated wind gust to 34 knots (39 MPH) near a mesonet at George Mason Elementary School (ALXD2) adjacent to the tidal Potomac River.

Marine Thunderstorm Wind in TIDAL POTOMAC KEY BRIDGE TO INDIAN HD MD, ATLANTIC NORTH
From 21-JUL-23 03:00:00 to 21-JUL-23 03:00:00 (EST-5)
Location: NATIONALS PARK (WSHNP)
Magnitude: 36.00 MG
Reported by: Mesonet

A wind gust of 36 knots (41 MPH) was measured by a mesonet at Nationals Park (WSHNP) adjacent to the tidal Potomac River.