Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 71, NWS Tampa Bay, FL

August 28, 1990Hillsborough County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Aug 28, 1990, 9:30 PM EDT for Hillsborough County, Florida. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Aug 28, 1990, 9:30 PM EDT (01:30 UTC)
Expired
Aug 28, 1990, 10:15 PM EDT
In force
45 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Hillsborough 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 00:00Z, 1.5 hours before the alert went out and 23 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 00:00Z on 1990-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2094 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 00:00Z on 1990-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
2094 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1032 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
26 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 290133
SVRTBW
FLC057-290215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
930 PM EDT TUE AUG 28 1990
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM EDT
FOR PEOPLE...
 
IN WEST CENTRAL FLORIDA
 
   ...EASTERN HILLSBOROUGH COUNTY
 
AT 930 PM NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
THUNDERSTORM IN EXTREME NORTHEASTERN HILLSBOROUGH COUNTY. THIS STORM
WAS MOVING TOWARD THE SOUTH SOUTHWEST AT NEAR 10 MILES AN HOUR AND MAY
AFFECT THE PLANT CITY AREA WITHIN THE NEXT 45 MINUTES.
 
THIS IS A DANGEROUS STORM WITH HEAVY RAIN...FREQUENT LIGHTNING
...DAMAGI4NG WINDS IN EXCESS OF 60 MILES AN HOUR AND
THE POSSIBILITY FOR SMALL HAIL. RESIDENTS IN THE PATH OF THIS STORM
SHOULD TAKE COVER.

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.