Coastal Flood — Inalnd St. Johns, Florida

2021-11-05 to 2021-11-07 · Inalnd St. Johns, Florida

Event narrative

On Friday, November 5th, the tide gauge at Racy Point on the St. Johns River (SRPF1) reached a peak tide of 1.64 ft MHHW datum. Minor tidal flooding impacts begin around 1.5 ft MHHW. Around 5:30 pm on Saturday November 6th, the tide gauge reached a peak water of 2.34 ft MHHW datum. Moderate tidal flooding impacts begin around 2 ft at this location. On Sunday November 7th around 4:15 pm, the tide gauge reached 2.14 ft MHHW.

Wider weather episode

An area of low pressure developed across the southern Gulf of Mexico on Friday Nov. 5th and tracked eastward across north-central Florida Friday night, deepening offshore of the local NE FL Atlantic coast on Saturday Nov. 6th as strong surface high pressure wedged southward north of the region. This created a rare, true Nor'Easter event for the local area which including coastal and tidal flooding with inundation of 2-3 ft at high tides and damaging wind gusts, A High Wind Warning and Storm Warning for coastal and marine areas was issued. Localized heavy rainfall occurred for portions of coastal NE Florida. Moderate to major coastal erosion occurred. Coastal wind gusts of 40-50 mph started Friday morning then increased to 45-55 mph into Friday evening. The strongest winds of the event occurred for coastal NE FL Saturday morning, Nov. 6th, with sustained speeds 45-55 mph and gusts 60-70 mph. A peak wind gust of 68 mph was measured at the St. Augustine C-MAN station Saturday morning 11/6 around 06:30 am (peak sustained wind was 55 mph from the north) with a gust of 70 mph at 5:37 am at the Huguenot Park mesonet site. Moderate tidal flooding occurred along the local Atlantic coast with inundation of 2-3 feet.

Source: NOAA Storm Events Database, event_id 991644. Narrative written by the NWS forecast office that issued the report.