Alert archive / Florida / Tornado Warnings in 1992

Tornado Warning 8, NWS Jacksonville, FL

September 1, 1992Saint Johns County, Florida

NWS Jacksonville, FL issued this tornado warning at Sep 1, 1992, 10:58 AM EDT for Saint Johns County, Florida. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Sep 1, 1992, 10:58 AM EDT (14:58 UTC)
Expired
Sep 1, 1992, 11:45 AM EDT
In force
47 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Saint Johns County, FL

The nearest sounding before it

Jacksonville, FL (KAYS), launched 12:00Z, 3.0 hours before the alert went out and 71 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, Jacksonville, FL at 12:00Z on 1992-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1751 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, Jacksonville, FL at 12:00Z on 1992-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 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
1751 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
716 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
-38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KJAX 011459
TORJAX
FLC109-011545-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1058 AM EDT TUE SEP 1 1992
 
THE NATIONAL WEATHER SERVICE IN JACKSONVILLE FL   HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1145 AM EDT
 
 
IN NORTHEAST FLORIDA
 
   ...ST JOHNS COUNTY
 
AND ADJACENT COASTAL WATERS OF NORTHEAST FLORIDA
 
 
AT 1050 AM EDT A PILOT REPORTED A WATERSPOUT OVER THE INTERCOASTAL
WATERWAY IN THE CRESENT BEACH AREA. NO MOVEMENT WAS REPORTED
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

Nearby

Tornado Warnings in Florida, 1992Every tornado warning in 1992Tornadoes in 1992

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.