Alert archive / Florida / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 36, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at May 3, 1997, 2:33 PM EDT for Duval County, Nassau County, Florida. It was in force for 42 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 3, 1997, 2:33 PM EDT (18:33 UTC)
- Expired
- May 3, 1997, 3:15 PM EDT
- In force
- 42 min
- Issued by
- NWS Jacksonville, FL
- Area
- Whole counties
Counties Duval County, FL, Nassau County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 3, 2:50 PM EDT | Hail 0.75 | Callahan, FL | |
| May 3, 3:00 PM EDT | Thunderstorm Wind | Jacksonville, FL | Large trees and power lines were blown down across New Berlin Road. |
| May 3, 3:20 PM EDT | Thunderstorm Wind 60 | Jacksonville, FL | Skywarn spotter reported |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 3, 12:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 6.6 hours before the alert went out and 3 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
- 1571 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 744 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.5
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 2:16 PM EDT | Severe Thunderstorm Warning | JAX | Atkinson, Coffee | 59 min |
| May 3, 3:03 PM EDT | Severe Thunderstorm Warning | JAX | Clinch, Echols | 42 min |
| May 3, 3:51 PM EDT | Severe Thunderstorm Warning | JAX | Camden | 54 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.