A waterspout produced by Tropical Cyclone Isaias moved onshore in Calvert County. There were also several sustained tropical storm force wind measurements from buoys.

Marine Tropical Storm in CHESAPEAKE BAY POOLES IS TO SANDY PT MD, ATLANTIC NORTH
From 04-AUG-20 07:00:00 to 04-AUG-20 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Multiple reports of tropical storm force sustained winds between 34 and 41 knots, as well as gusts between 40 0and 52 knots. Observations scattered around the entire zone.

Marine Tropical Storm in CHESAPEAKE BAY N OF POOLES IS MD, ATLANTIC NORTH
From 04-AUG-20 07:00:00 to 04-AUG-20 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Peak wind gust of 51 knots at 9:42 AM EST and 49 knots at 7:14 AM EST at Grove Point (GVP) and Cobb Point (COB) respectively. Sustained winds at both locations were 43 knots and 37 knots respectively.

Marine Tropical Storm in CHESAPEAKE BAY SANDY PT TO N BEACH MD, ATLANTIC NORTH
From 04-AUG-20 08:00:00 to 04-AUG-20 09:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Multiple reports of tropical storm force sustained winds between 34 and 40 knots, as well as gusts between 38 0and 56 knots. Reports were scattered around the entire zone.

Marine Tropical Storm in TIDAL POTOMAC COBB IS MD TO SMITH PT VA, ATLANTIC NORTH
From 04-AUG-20 07:00:00 to 04-AUG-20 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Multiple reports of sustained tropical storm force winds of 35-45 knots, with many peak wind gusts in the 50-60 knot range.

Marine Tropical Storm in CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER, ATLANTIC NORTH
From 04-AUG-20 07:30:00 to 04-AUG-20 09:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Multiple reports of sustained tropical storm force winds of 40-45 knots, with many peak wind gusts in the 50-60 knot range.

Waterspout in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 04-AUG-20 06:33:00 to 04-AUG-20 06:33:00 (EST-5)
Location: ROD N REEL CHESAPEAKE BEACH (CHSRL)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A waterspout moved onshore near Plum Point.

Marine Tropical Storm in CHESAPEAKE BAY N BEACH TO DRUM PT MD, ATLANTIC NORTH
From 04-AUG-20 06:45:00 to 04-AUG-20 08:45:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Sustained winds of 35 knots reported at Herring Bay (HRB), with a peak gust of 45 knots at 6:50 AM EST. Sustained winds of 32 knots at Cove Piont NOS Station (COVM2), with peak gust of 49 knots at 8:42 AM EST.

Marine Tropical Storm in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 04-AUG-20 06:00:00 to 04-AUG-20 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Estimated wind gusts of 40-60 knots across the zone, based on observations from surrounding zones, and some observations that can be used to cover both zones.

Marine Tropical Storm in TIDAL POTOMAC INDIAN HD TO COBB IS MD, ATLANTIC NORTH
From 04-AUG-20 07:00:00 to 04-AUG-20 08:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Multiple reports of sustained tropical storm force winds around 35 knots, with many peak wind gusts in the 35-50 knot range.

Marine Tropical Storm in CHESAPEAKE BAY DRUM PT TO SMITH PT VA, ATLANTIC NORTH
From 04-AUG-20 08:00:00 to 04-AUG-20 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Sustained winds of 36 knots reported at the Francis Scott Key Bridge NOS Station (FSKM2), with a peak gust of 41 knots at 9:18 AM EST. Peak gust at the Baltimore NOS Station (BLTM2) was 37 knots at 9:48 AM EST.

Marine Tropical Storm in PATUXENT RIVER TO BROOMES ISLAND MD, ATLANTIC NORTH
From 04-AUG-20 07:00:00 to 04-AUG-20 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Peak sustained winds of 36 knots, with a peak gust to 45 knots observed at 5:48 AM EST. This occurred with a storm in an outer band. Strong Tropical Storm force wind gusts continued for a few of hours after this.