Isaias tracked offshore of the local forecast area through the day August 3rd.  Occasional rainbands moved onshore over the local area through the day with gusts of 20-40 mph.

Tropical Storm in COASTAL ST. JOHNS, FLORIDA
From 02-AUG-20 04:00:00 to 04-AUG-20 04:00:00 (EST-5)
Reported by: Official NWS Observations

TS Isaias tracked north, offshore of the local coast. Broken rain bands moved onshore with brief squalls. At  5:27 am on 8/3, the AWOS at St. Augustine airport measured a peak wind of 21 mph from the north. A peak gust of 32 mph from the NNE was measured at 5:59 am. The St. Augustine C-Man station measured peak winds at 6:10 am with sustained 33 mph and a gust to 41 mph. Rainfall was minimal across the area with measured totals 1.02 inches at a few locations across western parts of the county per a CoCoRaHS station. Otherwise, rainfall was less than 1 inch with several areas near St. Augustine measuring around 0.50 inches. Storm surge was up to 2 ft inundation, most locations were 1.5 ft above dry ground or less. The only damage reported was from the National Park Service who stated that there was minor beach erosion at Fort Matanzas.

Tropical Storm in COASTAL DUVAL, FLORIDA
From 02-AUG-20 04:00:00 to 04-AUG-20 05:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Tropical Storm Isaias tracked northward and remained offshore of the local Atlantic coast and produced with broken squalls moving onshore over the local area. Impacts to the county were minimal and confined to the immediate coast where Jacksonville Beach lost about 5 feet of sand in some locations. The peak wind across the county was measured with a WeatherFlow mesonet station at Jacksonville Beach Pier and was sustained 35 mph with a peak gust of 41 mph on Aug. 3rd at 3:27 pm. Gusts in squalls generally ranged between 30-40 mph elsewhere across the county. Rainfall was minimal and the peak value across the county was measured at the NWS Jacksonville office of 0.53 inches. Peak storm surged was 1.44 ft above ground level (MHHW) at Mayport on Aug 3rd at 9:54 pm. The surge reached 1.23 ft MHHW at the Dames Point Bridge at 11 pm on Aug 3rd. Within the St Johns River basin peak surge reach 0.88 ft MHHW at the Southbank Riverwalk in downtown Jacksonville on Aug 3rd at 11:45 pm and 0.80 ft MHHW at the Buckman Bridge on Aug  4th at 12:45 am.

Tropical Storm in COASTAL NASSAU, FLORIDA
From 02-AUG-20 04:00:00 to 04-AUG-20 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Minimal impacts occurred to the county. The peak wind measured at the Fernandina Beach AWOS was 20 mph with a gust to 29 mph on Aug. 3rd at 2:35 pm. Measured rainfall was less than 0.50 inches across the county. The peak surge at Fernandina Beach was 1.59 ft MHHW on Aug. 3rd at 10:18 pm.

Tropical Storm in COASTAL FLAGLER, FLORIDA
From 02-AUG-20 04:00:00 to 04-AUG-20 04:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

There was no significant damage to the county. The peak wind gust was 41 mph at the Marineland WeatherFlow station on August 3rd at 3:23 am. Peak measured storm total rainfall was 0.63 inches about 1 mile SE of Flagler Beach by a COCORaHS observer. Peak storm surge was 1.22 ft  MHHW at Mantanzas River Bings Landing on August 4th at 1 am.