A low pressure system, turned tropical disturbance, moving across the western Atlantic and over the Bahamas abruptly formed into Tropical Depression Nineteen on September 11th. Tropical Depression Nineteen gradually continued westward and the center passed about 10 to 20 miles SSE of Miami, Florida during the morning of September 12th with a minimum central pressure of 1007 mb and maximum sustained winds of 35 mph. As Tropical Depression Nineteen moved westward over the South Florida peninsula, it continued to strengthen into a Tropical Storm known as Tropical Storm Sally. Lowest surface pressure recorded over the South Florida Atlantic Coast was 1005.5 mb at Fowey Rocks and maximum sustained winds of 46 mph/40 knots at Fowey Rocks on September 12.
Although the effects from Tropical Depression Nineteen were generally minor for wind, there were sustained Tropical Storm force winds across Biscayne Bay and the near-shore Atlantic waters with sustained Tropical Depression force winds over the outer Atlantic waters, which created hazardous marine conditions.

Marine Tropical Storm in BISCAYNE BAY, ATLANTIC SOUTH
From 12-SEP-20 00:00:00 to 13-SEP-20 01:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Sustained tropical storm force winds around 40 to 43 mph/35 to 37 knots were recorded in Biscayne Bay. A peak wind gust of 52 mph/45 knots was recorded by the WxFlow mesonet (XGVT) at Government Cut at 11:27 AM EDT in association with a strong outer rain band emanating from TD Nineteen on September 12th.

Marine Tropical Storm in DEERFIELD BEACH TO OCEAN REEF FL, ATLANTIC SOUTH
From 12-SEP-20 00:00:00 to 13-SEP-20 01:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Sustained tropical storm force winds around 40 to 46 mph/35 to 40 knots were recorded in the near-shore Atlantic waters. A peak wind gust of 55 mph/48 knots was recorded by the NDBC C-MAN station (FWYF1) at Fowey Rocks at 11:09 AM EDT in association with a strong outer rain band emanating from TD Nineteen on September 12th.

Marine Tropical Storm in JUPITER INLET TO DEERFIELD BEACH FL OUT 20NM, ATLANTIC SOUTH
From 12-SEP-20 00:00:00 to 13-SEP-20 01:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Sustained tropical storm force winds around 40 to 46 mph/35 to 40 knots were recorded in the near-shore Atlantic waters. A peak wind gust of 45 mph/39 knots was recorded by the WxFlow mesonet (XJUP) at Juno Beach Pier at 12:48 PM EDT and by the NOAA C-MAN station (LKWF1) at Lake Worth at 9:48 PM EDT on September 12th.

Marine Tropical Depression in DEERFIELD BEACH TO OCEAN REEF FL 20 TO 60NM, ATLANTIC SOUTH
From 12-SEP-20 00:00:00 to 13-SEP-20 01:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Sustained tropical depression force winds over the offshore waters were probably in the 25 to 33 knot range based on data from hurricane hunter aircraft, with gusts possibly as high as 40 to 45 knots.

Marine Tropical Depression in JUPITER INLET TO DEERFIELD BEACH FL 20 TO 60NM, ATLANTIC SOUTH
From 12-SEP-20 00:00:00 to 13-SEP-20 01:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Sustained tropical depression force winds over the offshore waters were probably in the 25 to 33 knot range based on data from hurricane hunter aircraft, with gusts possibly as high as 40 to 45 knots.