Alert archive / Florida / Tornado Warnings in 1996

Tornado Warning 21, NWS Jacksonville, FL

April 30, 1996Saint Johns County, Florida

NWS Jacksonville, FL issued this tornado warning at Apr 30, 1996, 7:48 AM EDT for Saint Johns County, Florida. It was in force for 42 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: Apr 30, 1996, 7:48 AM EDT (11:48 UTC)
Expired: Apr 30, 1996, 8:30 AM EDT
In force: 42 min
Issued by: NWS Jacksonville, FL
Area: Whole counties

County Saint Johns County, FL

What was reported inside it

Time	Report	Where	Remark
Apr 30, 7:56 AM EDT	Tornado F0	St Augustine Arpt, 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.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 11.8 hours before the alert went out and 71 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2034 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAX 301149
TORJAX
FLC109-301230-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
748 AM EDT TUE APR 30 1996
 
THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  830 AM EDT
FOR PERSONS IN THE FOLLOWING LOCATIONS ...
 
IN NORTH FLORIDA
 
   ...ST. JOHNS COUNTY
 
AND THE ADJOINING COASTAL WATERS.
 
AT 745 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
POSSIBLE TORNADO NEAR THE INTERSECTION OF STATE ROAD 16 AND I-95. THE
PARENT THUNDERSTORM IS MOVING EAST NORTHEAST AND SHOULD PASS NORTH OF ST
AUGUSTINE...IN THE VICINITY OF THE AIRPORT AND THEN INTO THE COASTAL
AREA BETWEEN VILANO BEACH AND SOUTH PONTE VEDRA BEACH.
 
IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE
INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR.  GET TO
A BASEMENT IF ONE IS AVAILABLE.  AVOID WINDOWS AND PROTECT YOUR
BODY FROM FLYING DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.
 
SANDRIK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 8:11 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford	64 min
Apr 29, 10:31 PM EDT	Severe Thunderstorm Warning	JAX	Clay	59 min
Apr 29, 11:28 PM EDT	Severe Thunderstorm Warning	JAX	Duval, Nassau	62 min
Apr 30, 7:17 AM EDT	Severe Thunderstorm Warning	JAX	Putnam	43 min
Apr 30, 7:30 AM EDT	Severe Thunderstorm Warning	JAX	Flagler, Saint Johns	45 min

Nearby

Tornado Warnings in Florida, 1996 Every tornado warning in 1996 Tornadoes in 1996

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.