Alert archive / Florida / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 9, NWS Tallahassee, FL

February 10, 1986Jackson County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Feb 10, 1986, 10:10 AM CST for Jackson County, Florida. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Feb 10, 1986, 10:10 AM CST (16:10 UTC)
Expired
Feb 10, 1986, 11:10 AM CST
In force
60 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Jackson 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, 4.2 hours before the alert went out and 120 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 1986-02-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 699 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 1986-02-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 184 square meters per square second.1939587897117Sfc1 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
699 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
526 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
184 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
0.9
Supercell composite
6.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTLH 101612 COR
SVRTLH
FLC063-101610-

BULLETIN -- IMMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1110 AM EST MON FEB 10 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1210 PM EST FOR PERSONS IN THE FOLLOWING COUNTIES IN

NORTH FLORIDA...JACKSON.

AT 1105 AM RADAR SHOWED A SEVERE THUNDERSTORM NEAR MARIANNA. THIS STORM
WAS NOVING NORTHEAST AROUND 30 MPH.

IIF THREATENING WEATHER IS SIGHTED YOU SHOULD SEEK SAFE SHELTER
IMMEDIATELY.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Feb 10, 5:20 AM CST, 4 hours 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE APALACHICOLA FL
620 AM EST MON FEB 10 1986

     ...TRAVELERS ADVISORY FOR PATCHY DENSE FOG UNTIL MID MORNING...

PATCHY DENSE FOG..AT TIMES REDUCING VISI]BILITY TO NEAR ZERO HAS DEVELOPED
OVER GULF AND FRANKLIN COUNTIES AND ADJACENT COASTAL WATERS. MOTORISTS
ARE URGED TO USE CAUTION..SLOW DOWN..USE LOW BEAM HEADLIGHTS..AND ALLOW FOR
EXTRA DRIVING TIME.

THE FOG WILL DISSIPATE BY MID MORNING.

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 10, 4:20 PM CSTTornado WarningTAEEscambia, Santa Rosa60 min

Nearby

Severe Thunderstorm Warnings in Florida, 1986Every severe thunderstorm warning in 1986

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.