Alert archive / Florida / Tornado Warnings in 1989

Tornado Warning 24, NWS Tallahassee, FL

October 18, 1989Franklin County, Florida

NWS Tallahassee, FL issued this tornado warning at Oct 18, 1989, 8:49 AM EDT for Franklin County, Florida. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Oct 18, 1989, 8:49 AM EDT (12:49 UTC)
Expired
Oct 18, 1989, 9:30 AM EDT
In force
41 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Franklin 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

Apalachicola Mun, FL (KAQQ), launched 12:00Z, 0.8 hours before the alert went out and 21 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, Apalachicola Mun, FL at 12:00Z on 1989-10-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 584 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, Apalachicola Mun, FL at 12:00Z on 1989-10-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
584 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
615 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAQQ 181250 RRA
TORAQQ
FLC037-181330-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE APALACHICOLA FL
849 AM EDT WED OCT 18 1989
 
THE NATIONAL WEATHER SERVICE IN APALACHICOLA HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  930 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHWEST FLORIDA...EASTERN FRANKLIN
 
AT 850 AM EDT...SHERIFF'S OFFICE IN APALACHICOLA HAS REPORTED A LARGE
TORNADO JUST OFFSHORE OF ALLIGATOR. THIS TORNADO WASy MOVGING TO THE
NORTHEAST AT 20 MILES AN HOUR.
 
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, 1989Every tornado warning in 1989Tornadoes in 1989

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.