Alert archive / Florida / Tornado Warnings in 2001

Tornado Warning 44, NWS Jacksonville, FL

September 13, 2001Nassau County, Florida

NWS Jacksonville, FL issued this tornado warning at Sep 13, 2001, 2:31 PM EDT for Nassau County, Florida. It was in force for 44 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
Sep 13, 2001, 2:31 PM EDT (18:31 UTC)
Expired
Sep 13, 2001, 3:15 PM EDT
In force
44 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Nassau County, FL

What was reported inside it

TimeReportWhereRemark
Sep 13, 2:40 PM EDTTornado F0Fernandina Beach, FLWeak F0. Waterspout moved on shore. Damaged the tops of a few trees.

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 12:00Z, 6.5 hours before the alert went out and 14 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, Jacksonville, FL at 12:00Z on 2001-09-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 837 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, Jacksonville, FL at 12:00Z on 2001-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.193958Sfc1 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
837 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
549 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
4 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.

799 
WFUS52 KJAX 131832
TORJAX
FLC089-131915-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
231 PM EDT THU SEP 13 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST NASSAU COUNTY IN NORTHEAST FLORIDA
  THIS INCLUDES...CALLAHAN...FERNANDINA BEACH...HILLIARD...

* UNTIL 315 PM EDT

* AT 226 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 4 MILES EAST OF AMELIA CITY...OR ABOUT 7 MILES
  SOUTHEAST OF FERNANDINA BEACH...MOVING WEST AT 10 MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 315 PM EDT...
  AMELIA CITY AND FERNANDINA BEACH...
  YULEE...


$$

PETERSON

Nearby

Tornado Warnings in Florida, 2001Every tornado warning in 2001Tornadoes in 2001

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.