Alert archive / Florida / Flash Flood Warnings in 2026
Flash Flood Warning 20, NWS Jacksonville, FL
NWS Jacksonville, FL issued this flash flood warning at Aug 28, 2026, 7:52 PM EDT for Baker County, Nassau County, Florida. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 28, 2026, 7:52 PM EDT (23:52 UTC)
- Expired
- Aug 28, 2026, 8:29 PM EDT
- In force
- 37 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Baker County, FL, Nassau County, FL
The radar
The Jacksonville radar (KJAX), 31 km from the middle of the area, began a volume at 23:53 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, 11.9 hours before the alert went out and 32 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
- 2088 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- -16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 12:53 PM EDT | Special Weather Statement | JAX | Marion | 37 min |
| Aug 28, 1:45 PM EDT | Special Weather Statement | JAX | Marion | 30 min |
| Aug 28, 4:01 PM EDT | Special Marine Warning | JAX | 44 min | |
| Aug 28, 4:20 PM EDT | Areal Flood Advisory | JAX | Nassau | 3 hr |
| Aug 28, 4:36 PM EDT | Special Marine Warning | JAX | 19 min | |
| Aug 28, 5:17 PM EDT | Special Weather Statement | JAX | Nassau | 28 min |
| Aug 28, 5:38 PM EDT | Areal Flood Advisory | JAX | Duval, Nassau | 102 min |
| Aug 28, 7:30 PM EDT | Areal Flood Advisory | JAX | Baker, Duval, Nassau | 75 min |
| Aug 27, 8:40 PM EDT | Areal Flood Advisory | JAX | Camden | 79 min |
| Aug 28, 12:43 PM EDT | Areal Flood Advisory | JAX | Glynn | 4 hr |
| Aug 28, 1:09 PM EDT | Special Weather Statement | JAX | Glynn | 36 min |
| Aug 28, 2:39 PM EDT | Areal Flood Advisory | JAX | Wayne | 2 hr |
| Aug 28, 3:43 PM EDT | Special Weather Statement | JAX | Camden | 32 min |
| Aug 28, 5:15 PM EDT | Special Weather Statement | JAX | Jeff Davis | 45 min |
| Aug 28, 5:37 PM EDT | Areal Flood Advisory | JAX | Jeff Davis | 3 hr |
| Aug 28, 6:03 PM EDT | Special Weather Statement | JAX | Jeff Davis | 27 min |
| Aug 28, 6:58 PM EDT | Areal Flood Advisory | JAX | Coffee, Jeff Davis | 3 hr |
| Aug 28, 7:38 PM EDT | Flash Flood Warning | JAX | Coffee, Jeff Davis | 48 min |
Nearby
Flash Flood Warnings in Florida, 2026Every flash flood warning in 2026
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.