Alert archive / Florida / Tornado Warnings in 1993

Tornado Warning 9, NWS Jacksonville, FL

June 27, 1993Saint Johns County, Florida

NWS Jacksonville, FL issued this tornado warning at Jun 27, 1993, 2:31 PM EDT for Saint Johns County, Florida. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Jun 27, 1993, 2:31 PM EDT (18:31 UTC)
Expired
Jun 27, 1993, 3:15 PM EDT
In force
44 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Saint Johns County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 6.5 hours before the alert went out and 264 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 1993-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1143 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 1993-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
1143 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
755 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
6 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 KJAX 271833
TORJAX
FLC109-FLZ031-271915-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
231 PM EDT SUN JUN 27 1993
 
THE NATIONAL WEATHER SERVICE IN JACKSONVILLE FL   HAS ISSUED A
TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL  315 PM EDT
...
 
IN NORTHEAST FLORIDA
 
   ...ST JOHNS COUNTY
 
  AND
 
  ...COASTAL WATERS
 
AT 230PM EDT NATIONAL WEATHER SERVICE RADAR AND PUBLIC REPORTS A TORNADO
SIGHTED NEAR CRESCENT BEACH AND HIGHWAY 206. SEVERAL HOUSES DAMAGED. THE
TORNADO IS MOVING EAST AT NEAR 15 MPH AND SHOULD MOVE OVER THE OCEAN
WITHIN THE NEXT FEW MINUTES.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDIZNG.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
 
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 3:50 PM EDTTornado WarningJAXDuval40 min

Nearby

Tornado Warnings in Florida, 1993Every tornado warning in 1993Tornadoes in 1993

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.