Alert archive / Florida / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 285, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 17, 2023, 6:30 PM EDT for Columbia County, Hamilton County, Suwannee County, Florida. It was in force for 45 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 17, 2023, 6:30 PM EDT (22:30 UTC)
- Expired
- Aug 17, 2023, 7:15 PM EDT
- In force
- 45 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Columbia County, FL, Hamilton County, FL, Suwannee County, FL
The radar
The Moody AFB radar (KVAX), 67 km from the middle of the area, began a volume at 22:30 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
Tampa Bay, FL (KTBW), launched 12:00Z, 10.5 hours before the alert went out and 292 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
- 1718 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 799 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 86 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 17, 12:52 PM EDT | Special Weather Statement | JAX | Duval | 23 min |
| Aug 17, 12:56 PM EDT | Special Weather Statement | JAX | Marion | 49 min |
| Aug 17, 1:18 PM EDT | Special Marine Warning | JAX | 27 min | |
| Aug 17, 2:32 PM EDT | Special Weather Statement | JAX | Duval | 43 min |
| Aug 17, 2:47 PM EDT | Special Weather Statement | JAX | Saint Johns | 28 min |
| Aug 17, 3:02 PM EDT | Special Weather Statement | JAX | Alachua | 43 min |
| Aug 17, 3:08 PM EDT | Special Weather Statement | JAX | Nassau | 37 min |
| Aug 17, 3:35 PM EDT | Special Marine Warning | JAX | 55 min | |
| Aug 17, 3:36 PM EDT | Special Marine Warning | JAX | 35 min | |
| Aug 17, 3:41 PM EDT | Special Weather Statement | JAX | Flagler | 34 min |
| Aug 17, 4:06 PM EDT | Special Weather Statement | JAX | Nassau | 39 min |
| Aug 17, 4:22 PM EDT | Special Weather Statement | JAX | Clay | 23 min |
| Aug 17, 4:27 PM EDT | Special Weather Statement | JAX | Marion | 48 min |
| Aug 17, 4:55 PM EDT | Special Weather Statement | JAX | Nassau | 35 min |
| Aug 17, 5:04 PM EDT | Special Weather Statement | JAX | Hamilton | 41 min |
| Aug 17, 5:13 PM EDT | Special Weather Statement | JAX | Marion | 32 min |
| Aug 17, 5:22 PM EDT | Areal Flood Advisory | JAX | Duval, Nassau | 49 min |
| Aug 17, 5:48 PM EDT | Special Weather Statement | JAX | Nassau | 27 min |
| Aug 17, 5:52 PM EDT | Special Marine Warning | JAX | 53 min | |
| Aug 17, 6:07 PM EDT | Special Weather Statement | JAX | Hamilton, Suwannee | 53 min |
| Aug 17, 7:00 PM EDT | Special Weather Statement | JAX | Columbia, Suwannee | 45 min |
| Aug 17, 5:38 PM EDT | Special Weather Statement | JAX | Echols | 37 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2023Every severe thunderstorm warning in 2023
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.