Alert archive / Florida / Tornado Warnings in 1990

Tornado Warning 7, NWS Jacksonville, FL

October 11, 1990Columbia County, Florida

NWS Jacksonville, FL issued this tornado warning at Oct 11, 1990, 4:00 PM EDT for Columbia County, Florida. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Oct 11, 1990, 4:00 PM EDT (20:00 UTC)
Expired
Oct 11, 1990, 4:45 PM EDT
In force
45 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Columbia County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Jacksonville, FL (KAYS), launched 12:00Z, 8.0 hours before the alert went out and 94 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 1990-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 262 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 1990-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
262 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAX 112003
TORJAX
FLC023-112045-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
400 PM EDT THU OCT 11 1990
 
THE NATIONAL WEATHER SERVICE IN JACKSONVILLE FL   HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  445 PM EDT
 
 
IN NORTHEAST FLORIDA
 
   ...NORTHERN COLUMBIA COUNTY
 
AT 355 PM EDT THE LAKE CITY SHERIFFS OFFICE REPORTED A TORNADO
TOUCHDOWN ON THE EAST SIDE OF LAKE CITY WITH DAMAGE TO MOBILE HOMES
AND TREES DOWN. THE TORNADO WAS MOVING NORTH.
NATIONAL WEATHER SERVICE RADAR SHOWS THUNDERSTORMS IN THE AREA MOVING
NORTHWEST AT 35 MILES AN HOUR.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

Nearby

Tornado Warnings in Florida, 1990Every tornado warning in 1990Tornadoes in 1990

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.