Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 13, NWS Tampa Bay, FL

February 11, 1993Sumter County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Feb 11, 1993, 5:40 PM EST for Sumter County, Florida. It was in force for 50 min.

The area

The counties it named.

The facts

Issued
Feb 11, 1993, 5:40 PM EST (22:40 UTC)
Expired
Feb 11, 1993, 6:30 PM EST
In force
50 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Sumter County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 10.7 hours before the alert went out and 116 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, Tampa Bay, FL at 12:00Z on 1993-02-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 63 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, Tampa Bay, FL at 12:00Z on 1993-02-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 173 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
63 J/kg
Mixed-layer CIN
-152 J/kg
Mixed-layer LCL
619 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
173 m²/s²
0-3 km storm-relative helicity
207 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 KTBW 112241
SVRTBW
FLC119-112330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
540 PM EST THU FEB 11 1993
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM EST
FOR PEOPLE......
 
IN CENTRAL FLORIDA
 
   ...SUMTER COUNTY
 
 
 
A SEVERE THUNDERSTORM WAS DETECTED BY RADAR NEAR BUSHNELL. THE
THUNDERSTORM WAS MOVING TO THE NORTHEAST AT 40 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
IF YOU ARE IN THE PATH OF A SEVERE THUNDERSTORM MOVE TO A
REINFORCED BUILDING.
 
IF YOU SEE A TORNADO... HAIL... OR DAMAGING WIND...
CALL THE WEST CENTRAL AND SOUTHWEST FLORIDA SEVERE WEATHER LINE AT
1-800-282-5584.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 11, 5:09 PM ESTSevere Thunderstorm WarningTBWPasco66 min
Feb 11, 6:22 PM ESTSevere Thunderstorm WarningTBWHillsborough68 min

Nearby

Severe Thunderstorm Warnings in Florida, 1993Every severe thunderstorm warning in 1993

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.