Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 64, NWS Tampa Bay, FL

August 18, 1990Sarasota County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 18, 1990, 2:59 PM EDT for Sarasota County, Florida. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Aug 18, 1990, 2:59 PM EDT (18:59 UTC)
Expired
Aug 18, 1990, 3:45 PM EDT
In force
46 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Sarasota 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

Tampa Bay, FL (KTBW), launched 12:00Z, 7.0 hours before the alert went out and 58 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 1990-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2422 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 1990-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
2422 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
28 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 KTBW 181901
SVRTBW
FLC115-181945-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
259 PM EDT SAT AUG 18 1990
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  345 PM EDT
FOR PEOPLE...
 
IN WEST CENTRAL FLORIDA
 
   ...SOUTHERN SARASOTA COUNTY
 
AND ADJACENT COASTAL WATERS
INCLUDING THE BAY AND INLAND WATERS
 
 
 
A SEVERE THUNDERSTORM WAS DETECTED BY RADAR ABOUT 7 MILES NORTHEAST OF
ENGLEWOOD. THE THUNDERSTORM WAS MOVING TO THE WEST AT 10 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
CARS AND MOBILE HOMES ARE NOT SAFE. IF YOU ARE IN THE PATH OF A
SEVERE THUNDERSTORM MOVE TO A REINFORCED BUILDING.
 
IF YOU SEE A TORNADO... WATERSPOUT... 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
Aug 18, 5:06 PM EDTSevere Thunderstorm WarningTBWPolk69 min
Aug 18, 6:16 PM EDTSevere Thunderstorm WarningTBWPolk59 min
Aug 18, 6:27 PM EDTSevere Thunderstorm WarningTBWHighlands63 min
Aug 18, 6:56 PM EDTSevere Thunderstorm WarningTBWHillsborough64 min
Aug 18, 7:20 PM EDTSevere Thunderstorm WarningTBWHardee55 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.