Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 73, NWS Tampa Bay, FL

September 1, 1990Pinellas County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Sep 1, 1990, 7:02 PM EDT for Pinellas County, Florida. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Sep 1, 1990, 7:02 PM EDT (23:02 UTC)
Expired
Sep 1, 1990, 7:45 PM EDT
In force
43 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Pinellas County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Sep 1, 7:30 PM EDTThunderstorm Wind 52Pinellas, FL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 11.0 hours before the alert went out and 40 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 1990-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 844 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 1990-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 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
844 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1033 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
7 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 012303
SVRTBW
FLC103-012345-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
702 PM EDT SAT SEP 1 1990
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  745 PM EDT
FOR PEOPLE...
 
IN WEST CENTRAL FLORIDA
 
   ...PINELLAS COUNTY
 
AND FOR THE COASTAL WATERS OF...
 
  ...PINELLAS COUNTY
 
 
 
SEVERAL INTENSE THUNDERSTORMS WERE DEVELOPING OVER PINELLAS COUNTY
MOVING WESTWARD TOWARD THE GULF OF MEXICO AT 10 MPH.
 
THREE QUARTER INCH HAIL AND HIGH WIND GUSTS WERE REPORTED NEAR
GULFPORT AND ECKERD COLLEGE AT 650 PM.
 
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.
 
MARINE INTERESTS AND SMALL CRAFT OPERATORS SHOULD MAKE PREPARATIONS
FOR SUDDEN AND STRONG WIND GUSTS FROM THE EAST AND TEMPORARY ROUGH
SEAS OR SEEK SAFE HARBOR IMMEDIATELY

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.