Alert archive / Florida / Tornado Warnings in 1990

Tornado Warning 9, NWS Tampa Bay, FL

August 19, 1990Pinellas County, Florida

NWS Tampa Bay, FL issued this tornado warning at Aug 19, 1990, 3:08 PM EDT for Pinellas County, Florida. It was in force for 22 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
Aug 19, 1990, 3:08 PM EDT (19:08 UTC)
Expired
Aug 19, 1990, 3:30 PM EDT
In force
22 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
Aug 19, 3:10 PM EDTTornado F0Pinellas, 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, 7.1 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 1990-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2124 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 1990-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 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
2124 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
72 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 191909
TORTBW
FLC103-191930-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
308 PM EDT SUN AUG 19 1990
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL  340 PM EDT
FOR PEOPLE...
 
IN WEST CENTRAL FLORIDA
 
   ...NORTHERN PINELLAS COUNTY
 
A WATERSPOUT WAS SIGHTED BY THE PUBLIC NEAR SAFETY HARBOR MOVING
SOUTHWEST AT 10 TO 15 MPH.
 
MARINE INTERESTS IN NORTHWEST TAMPA BAY SHOULD BE ALERT TO WATERSPOUTS
AND POSSIBLE GUSTY WINDS IN THE VICINTY OF THUNDERSTORMS OVER NORTHERN
PINELLAS COUNTY WITH THUNDERSTORMS AFFECTING THE GULF COAST WATERS
DURING THE NEXT HALF HOUR.
 
WATERSPOUTS CAN MOVE ONSHORE AND DO DAMAGE.
 
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 19, 3:42 PM EDTSevere Thunderstorm WarningTBWPinellas48 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.