Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 260, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 5, 1998, 8:19 PM EDT for Marion County, Putnam County, Florida. It was in force for 46 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
- Jul 5, 1998, 8:19 PM EDT (00:19 UTC)
- Expired
- Jul 5, 1998, 9:05 PM EDT
- In force
- 46 min
- Issued by
- NWS Jacksonville, FL
- Area
- Whole counties
Counties Marion County, FL, Putnam County, FL
The nearest sounding before it
Jacksonville, FL (KJAX), launched 00:00Z, 0.3 hours before the alert went out and 123 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
- 2053 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1449 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 5, 8:00 PM EDT, 19 minutes earlier.
Area forecast discussion, Jul 5, 8:00 PM EDT, 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 800 PM EDT SUN JUL 5 1998 WIDELY SCATTERED LATE AFTERNOON CONVECTION WAS ENHANCED BY THE EAST COAST C-BREEZE AND INTERACTION OF OUTFLOW BOUNDARIES. STORMS TO GRADUALLY DIMINISH AND BECOME ISOLATED SHORTLY AFTER SUNSET. WILL UPDATE THE FL ZONE PACKAGE LATER ONCE CONVECTION DIES OUT AND REMOVE REFERENCE TO EVENING. UPPER LEVEL TROF AXIS TO DRIFT OVER THE NORTH FL PENINSULA TOMORROW. THIS FEATURE COMBINED WITH THE C-BREEZE INTERACTION SHOULD HELP ENHANCE DEVELOPMENT AND COVERAGE OF AFTERNOON/EVENING CONVECTION OVER OUR REGION MON...ESPECIALLY OVER THE SOUTHERN 1/2 OF OUR FA. MOBBS
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 1:30 PM EDT | Severe Thunderstorm Warning | JAX | Marion | 60 min |
| Jul 6, 2:20 PM EDT | Severe Thunderstorm Warning | JAX | Flagler | 60 min |
| Jul 6, 3:47 PM EDT | Severe Thunderstorm Warning | JAX | Putnam | 93 min |
| Jul 6, 5:31 PM EDT | Severe Thunderstorm Warning | JAX | Alachua | 64 min |
| Jul 5, 11:07 PM EDT | Severe Thunderstorm Warning | JAX | Camden | 63 min |
| Jul 5, 11:49 PM EDT | Tornado Warning | JAX | Camden | 31 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning in 1998
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.