Alert archive / Florida / Tornado Warnings in 1989

Tornado Warning 6, NWS Tampa Bay, FL

August 10, 1989Pinellas County, Florida

NWS Tampa Bay, FL issued this tornado warning at Aug 10, 1989, 3:40 PM EDT for Pinellas County, Florida. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Aug 10, 1989, 3:40 PM EDT (19:40 UTC)
Expired
Aug 10, 1989, 4:15 PM EDT
In force
35 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.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 7.7 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 1989-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 437 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 1989-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 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
437 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTBW 101940
TORTBW
FLC103-102015-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
340 PM EDT THU AUG 10 1989
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  415 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN CENTRAL FLORIDA
          ...PINELLAS
 
A TORNADO WAS SIGHTED NEAR TREASURE ISLAND MOVING TO THE EAST TOWARD
ST PETERSBURG.
 
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 OFFICE OR COUNTY EMERGENCY OPERATIONS CENTER AND REQUEST
THEY RELAY THIS INFORMATION TO THE NATIONAL WEATHER SERVICE.

Nearby

Tornado Warnings in Florida, 1989Every tornado warning in 1989Tornadoes in 1989

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.