Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 21, NWS Tallahassee, FL

February 16, 1990Calhoun County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Feb 16, 1990, 2:28 PM CST for Calhoun County, Florida. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Feb 16, 1990, 2:28 PM CST (20:28 UTC)
Expired
Feb 16, 1990, 3:00 PM CST
In force
32 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Calhoun 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, 8.5 hours before the alert went out and 78 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 1990-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 265 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 1990-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 301 square meters per square second.19395878Sfc1 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
265 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
301 m²/s²
0-3 km storm-relative helicity
295 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTLH 162029
SVRTLH
FLC013-162100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
328 PM EST (228 PM CST) FRI FEB 16 1990
 
THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  400 PM EST (300 PM CST)
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH FLORIDA
 
   ...CALHOUN COUNTY
 
AT 225 PM CST RADAR INDICATED A POSSIBLE SEVERE THUNDERSTORM ENTERING
SOUTHWEST CALHOUN COUNTY MOVING NORTHEAST AT 45 MPH. RADAR INDICATED
HAIL WITH THIS STORM.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 16, 9:33 AM CSTSevere Thunderstorm WarningTAEEscambia, Santa Rosa42 min
Feb 16, 10:11 AM CSTSevere Thunderstorm WarningTAEEscambia, Santa Rosa64 min
Feb 16, 11:13 AM CSTSevere Thunderstorm WarningTAEEscambia, Santa Rosa62 min
Feb 16, 11:13 AM CSTSevere Thunderstorm WarningTAEOkaloosa62 min

Nearby

Severe Thunderstorm Warnings in Florida, 1990Every severe thunderstorm warning 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.