Alert archive / Florida / Coastal Flood Warnings in 2021
Coastal Flood Warning 1, NWS Jacksonville, FL
NWS Jacksonville, FL issued this coastal flood warning at Nov 4, 2021, 2:07 PM EDT for 5 counties in Florida; Camden County, Glynn County, Georgia. It took effect at Nov 5, 2021, 3:41 AM EDT. It was in force for 5 days. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Nov 4, 2021, 2:07 PM EDT (18:07 UTC)
- In effect from
- Nov 5, 2021, 3:41 AM EDT
- Expired
- Nov 9, 2021, 3:35 PM EST
- In force
- 5 days
- Issued by
- NWS Jacksonville, FL
Counties Clay County, FL, Duval County, FL, Flagler County, FL, Nassau County, FL, Putnam County, FL, Camden County, GA, Glynn County, GA
The radar
The Jacksonville radar (KJAX), 21 km from the middle of the area, began a volume at 18:10 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 6.1 hours before the alert went out and 22 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 588 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this coastal flood warning went out, 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 this coastal flood warning went out at Nov 4, 1:51 PM EDT, 16 minutes earlier.
Area forecast discussion, Nov 4, 1:51 PM EDT, 16 minutes before
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</html>The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 4, 3:06 AM EDT | Coastal Flood Advisory | JAX | Duval, Flagler, Nassau | 61 hr |
| Nov 4, 3:34 AM EDT | Gale Watch | JAX | 30 hr | |
| Nov 4, 1:37 PM EDT | Flood Watch | JAX | Duval, Flagler, Nassau, Putnam | 37 hr |
Nearby
Coastal Flood Warnings in Florida, 2021Coastal Flood Warnings in Georgia, 2021Every coastal flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.