Alert archive / Florida / Tornado Warnings in 1987

Tornado Warning 7, NWS Jacksonville, FL

September 5, 1987Columbia County, Florida

NWS Jacksonville, FL issued this tornado warning at Sep 5, 1987, 4:36 PM EDT for Columbia County, Florida. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Sep 5, 1987, 4:36 PM EDT (20:36 UTC)
Expired
Sep 5, 1987, 5:45 PM EDT
In force
69 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, 8.6 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 1987-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 1987-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 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
35 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
525 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
140 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 052036
TORJAX
FLC023-052145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
436 PM EDT SAT SEP 5 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 545 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

NORTHEAST FLORIDA...COLUMBIA

AT 430 PM EDT THE COLUMBIA COUNTY SHERIFS OFFICE REPORTED A
TORNADO 7 MILES SOUTH OF LAKE CITY MOVING TOWARD LAKE CITY.

IF YOU ARE IN THE PATH OF THIS TORNADO..THE SAFEST PLACE IS A
BASEMENT. GET UNDER A PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE..SEEK SHELTER IN AN INTERIOR ROOM ON THE LOWEST FLOOR.
USE BLANKETS OR PILLOWS TO COVER YOUR BODY. AVOID WINDOWS.

THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN
THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE OTHERWISE..GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE AVOID WINDOWS. ABANDON CARS AND MOBILgE HOMES FOR A
REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.

Nearby

Tornado Warnings in Florida, 1987Every tornado warning in 1987Tornadoes in 1987

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.