Alert archive / Florida / Tornado Warnings in 1991

Tornado Warning 4, NWS Tampa Bay, FL

May 18, 1991Lee County, Florida

NWS Tampa Bay, FL issued this tornado warning at May 18, 1991, 4:46 PM EDT for Lee County, Florida. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
May 18, 1991, 4:46 PM EDT (20:46 UTC)
Expired
May 18, 1991, 5:30 PM EDT
In force
44 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Lee County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 8.8 hours before the alert went out and 132 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 1991-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 192 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 1991-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 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
192 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
890 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-16 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 182051
TORTBW
FLC071-182130-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
446 PM EDT SAT MAY 18 1991
 
THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA RUSKIN HAS ISSUED A
TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL  530 PM EDT
FOR PEOPLE...
 
IN WEST CENTRAL FLORIDA
 
   ...WESTERN LEE COUNTY
 
  AND FOR THE COASTAL WATERS FROM...
 
   ...FORT MYERS BEACH  TO  BONITA BEACH
 
 
 
 
 
A TORNADO WAS REPORTED BY THE PUBLIC   NEAR BONITA BEACH . THE
TORNADO WAS MOVING TOWARD FT. MYERS BEACH.   THUNDERSTORMS IN THE
AREA WILL BE MOVING INTO THE COASTAL WATEWRS AND INTENSIFYING DURING
THE NEXT HOUR.

Nearby

Tornado Warnings in Florida, 1991Every tornado warning in 1991Tornadoes in 1991

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.