Alert archive / Florida / Tornado Warnings in 1986

Tornado Warning 11, NWS Tampa Bay, FL

September 10, 1986Hillsborough County, Florida

NWS Tampa Bay, FL issued this tornado warning at Sep 10, 1986, 7:25 PM EDT for Hillsborough County, Florida. It was in force for 20 min.

The area

The counties it named.

The facts

Issued
Sep 10, 1986, 7:25 PM EDT (23:25 UTC)
Expired
Sep 10, 1986, 7:45 PM EDT
In force
20 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 12:00Z, 11.4 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 12:00Z on 1986-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 144 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 1986-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 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
144 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
1107 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
88 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 102325
TORTBW
FLC057-102345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE TAMPA BAY-RUSKIN FL
725 PM EDT WED SEP 10 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 745 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

WEST CENTRAL FLORIDA...EASTERN HILLSBOROUGH

 A TORNDAO WAS SIGHTED NEAR HOPEWELL IN EASTERN HILLSBOROUGH
 COUNTY AROUND 715 PM EDT. RADAR INDICATED HEAVY THUNDERSTORMS
 IN THE SOUTHEAST PORTION OF THE COUNTY DRIFTING SLOWLY TO THE
 NORTH.

IF YOU ARE IN THE PATH OF THIS TORNADO..GO TO A REINFORCED SHELTER
OR A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON CARS AND
MOBILE HOMES FOR A RDEINFORCED BUILDING.

Nearby

Tornado Warnings in Florida, 1986Every tornado warning in 1986Tornadoes in 1986

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.