Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 253, NWS Jacksonville, FL

July 3, 1998Clay County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 3, 1998, 6:24 PM EDT for Clay County, Florida. It was in force for 66 min. 1 report 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
Jul 3, 1998, 6:24 PM EDT (22:24 UTC)
Expired
Jul 3, 1998, 7:30 PM EDT
In force
66 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Clay County, FL

What was reported inside it

TimeReportWhereRemark
Jul 3, 7:34 PM EDTThunderstorm WindPenney Farms, FLLarge trees and power lines were blown down.

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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.4 hours before the alert went out and 239 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.

Skew-T log-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 1998-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 79 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 1998-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -68 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
79 J/kg
Mixed-layer CIN
-155 J/kg
Mixed-layer LCL
1425 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-68 m²/s²
0-3 km storm-relative helicity
-62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Jul 3, 5:20 AM EDTSevere Thunderstorm WarningJAXSaint Johns80 min
Jul 3, 5:20 PM EDTSevere Thunderstorm WarningJAXSaint Johns80 min
Jul 3, 5:36 PM EDTSevere Thunderstorm WarningJAXFlagler74 min
Jul 3, 6:01 PM EDTSevere Thunderstorm WarningJAXPutnam64 min
Jul 3, 7:14 PM EDTSevere Thunderstorm WarningJAXPutnam76 min
Jul 3, 7:27 PM EDTSevere Thunderstorm WarningJAXAppling63 min
Jul 3, 7:39 PM EDTSevere Thunderstorm WarningJAXBacon, Pierce61 min
Jul 3, 7:42 PM EDTSevere Thunderstorm WarningJAXCamden63 min
Jul 3, 7:47 PM EDTSevere Thunderstorm WarningJAXBrantley, Pierce63 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.