Florida, 2018

Coastal Flood in Florida, November 23 to 24, 2018

November 23 to 24, 2018 · NWS JAX · 6 events in 4 counties and zones

A tight pressure gradient between low pressure east of the region and high pressure north of the area created strong onshore flow. The persistent onshore flow combined with high astronomical tides created moderate tidal flooding around high tide.

Where it happened

Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
6

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS JAX wrote it up.

A tight pressure gradient between low pressure east of the region and high pressure north of the area created strong onshore flow. The persistent onshore flow combined with high astronomical tides created moderate tidal flooding around high tide.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jacksonville, FL wrote its last area forecast discussion before the first event at Nov 22, 4:37 PM EST, 16 hours 5 minutes earlier.

Area forecast discussion, Nov 22, 4:37 PM EST, 16 hours 5 minutes before
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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

6 coastal flood. Local standard time, as filed.

Coastal Flood, Coastal Duval

When
November 23, 8:42 AM EST
Where
Coastal Duval forecast zone
Reported by
C-MAN Station
Coordinates
30.335, -81.648 (the zone’s center; the record gives no point)

The Mayport C-Man station reported water level at 2.07 ft above MHHW around high tide.

Coastal Flood, Coastal Nassau

When
November 23, 8:48 AM EST
Where
Coastal Nassau forecast zone
Reported by
C-MAN Station
Coordinates
30.611, -81.771 (the zone’s center; the record gives no point)

Water level peaked at 2.37 ft above MHHW at the Fernandina Beach C-man station.

Coastal Flood, Coastal St. Johns

When
November 23, 9:15 AM EST
Where
Coastal St. Johns forecast zone
Reported by
Broadcast Media

A1A flooded along the Matanzas River in historic St. Augustine. The nearest tide gage along the Tolomoto River measured water level 3.67 ft MHHW as of 8:54 am, reaching moderate flooding thresholds. Thus far, this level tied the 9th highest historic crest for the site, previously set on 11/14/2012.

Coastal Flood, Coastal Duval

When
November 23, 10:05 AM EST
Where
Coastal Duval forecast zone
Reported by
NWS Employee
Coordinates
30.335, -81.648 (the zone’s center; the record gives no point)

Tidal flooding was observed along Beach Blvd and the Intracoastal Waterway. Water was over the road and across parking lots near Beach Marine. Observations were consistent with strong local Nor'easter events rising water levels into minor flood stage to low end moderate flood stage.

Coastal Flood, Coastal Duval

When
November 23, 11:30 AM EST to November 24, 12:30 PM EST
Where
Coastal Duval forecast zone
Reported by
Public
Coordinates
30.335, -81.648 (the zone’s center; the record gives no point)

Coastal flooding occurred at morning high tide on 11/23 around 11:30 am and again on 11/24 at 12:30 pm along Hopkins Creek in Neptune Beach just off of the Intracoastal Waterway. Water topped the Kings Road Causeway.

Coastal Flood, Coastal Flagler

When
November 24, 1:40 PM EST
Where
Coastal Flagler forecast zone
Reported by
Emergency Manager
Coordinates
29.471, -81.293 (the zone’s center; the record gives no point)

Water over-topped older docks in Palm Coast with high tide.

What these are

Coastal Flood
Flooding of coastal land by the sea, from storm surge, onshore wind or high tides.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Florida in 2018Every state in 2018This day in weather historyWarnings in Florida, November 2018

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 788222, 788223, 788224, 788225, 788227, 788226.