Alert archive / Florida / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 142, NWS Jacksonville, FL

October 2, 1994Nassau County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Oct 2, 1994, 10:45 PM EDT for Nassau County, Florida. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Oct 2, 1994, 10:45 PM EDT (02:45 UTC)
Expired
Oct 2, 1994, 11:30 PM EDT
In force
45 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Nassau County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 2.8 hours before the alert went out and 243 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 00:00Z on 1994-10-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2226 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1994-10-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.193958Sfc1 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
2226 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
485 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
1.5
Supercell composite
10.6

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
Oct 3, 1:02 AM EDTSevere Thunderstorm WarningJAXColumbia43 min
Oct 3, 1:46 AM EDTSevere Thunderstorm WarningJAXNassau44 min
Oct 2, 11:12 PM EDTSevere Thunderstorm WarningJAXJeff Davis, Toombs63 min
Oct 2, 11:52 PM EDTSevere Thunderstorm WarningJAXEffingham53 min

Nearby

Severe Thunderstorm Warnings in Florida, 1994Every severe thunderstorm warning in 1994

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.