Alert archive / Florida / Tornado Warnings in 1990

Tornado Warning 6, NWS Tampa Bay, FL

July 20, 1990Manatee County, Florida

NWS Tampa Bay, FL issued this tornado warning at Jul 20, 1990, 6:36 PM EDT for Manatee County, Florida. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1990, 6:36 PM EDT (22:36 UTC)
Expired
Jul 20, 1990, 7:15 PM EDT
In force
39 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Manatee 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, 10.6 hours before the alert went out and 26 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 1990-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1779 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 1990-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
1779 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
560 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
22 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 202236
TORTBW
FLC081-202315-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
636 PM EDT FRI JUL 20 1990
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  715 PM EDT
FOR PEOPLE...
 
IN WEST CENTRAL FLORIDA
 
   ...NORTHERN MANATEE COUNTY
 
 
A TORNADO WAS SIGHTED NEAR PARISH. MOVEMENT WAS UNKNOWN.
 
IF YOU ARE IN THE PATH OF A TORNADO MOVE TO A REINFORCED SHELTER
TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. AVOID WINDOWS.
ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING OR GET
INTO A DITCH OR CULVERT.
 
IF YOU SEE A TORNADO... HAIL OR DAMAGING WIND... CALL YOUR LOCAL
SHERIFFS OFFHICE OR COUNTY EMERGENCY OPERATIONS CENTER AND REQUEST
THEY RELAY THIS INFORMATION TO THE NATIONAL WEATHER SERVICE.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 2:42 PM EDTSevere Thunderstorm WarningTBWLee108 min
Jul 20, 5:56 PM EDTSevere Thunderstorm WarningTBWHillsborough49 min
Jul 20, 6:50 PM EDTSevere Thunderstorm WarningTBWHillsborough40 min

Nearby

Tornado Warnings in Florida, 1990Every tornado warning in 1990Tornadoes 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.