Alert archive / Florida / Tornado Warnings in 2001

Tornado Warning 39, NWS Jacksonville, FL

August 31, 2001Nassau County, Florida; Charlton County, Georgia

NWS Jacksonville, FL issued this tornado warning at Aug 31, 2001, 7:20 PM EDT for Nassau County, Florida; Charlton County, Georgia. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Aug 31, 2001, 7:20 PM EDT (23:20 UTC)
Expired: Aug 31, 2001, 7:45 PM EDT
In force: 25 min
Issued by: NWS Jacksonville, FL
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Nassau County, FL, Charlton County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 11.3 hours before the alert went out and 35 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: 1795 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 918 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 13 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.

494 
WFUS52 KJAX 312321
TORJAX
FLC089-GAC049-312345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
720 PM EDT FRI AUG 31 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN NASSAU COUNTY IN NORTHEAST FLORIDA
  SOUTH CENTRAL CHARLTON COUNTY IN SOUTHEAST GEORGIA

* UNTIL 745 PM EDT

* AT 715 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 2 MILES NORTH OF ST. GEORGE...OR ABOUT 12 MILES
  SOUTHWEST OF HILLIARD...MOVING EAST AT 15 MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 745 PM EDT...
  ST. GEORGE...

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT...OR YOU CAN CALL THE NATIONAL
WEATHER SERVICE DIRECTLY AT 904-741-4370 TO REPORT SEVERE WEATHER.

LAT...LON 3062 8216 3044 8208 3051 8185 3078 8197

$$

WELSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 8:32 PM EDT	Severe Thunderstorm Warning	JAX	Clay	28 min
Aug 30, 8:59 PM EDT	Severe Thunderstorm Warning	JAX	Clay	26 min
Aug 31, 4:25 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Suwannee	65 min
Aug 31, 4:28 PM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	62 min
Aug 31, 5:21 PM EDT	Severe Thunderstorm Warning	JAX	Duval	39 min
Aug 31, 5:28 PM EDT	Severe Thunderstorm Warning	JAX	Clay	47 min

Nearby

Tornado Warnings in Florida, 2001 Tornado Warnings in Georgia, 2001 Every tornado warning in 2001 Tornadoes 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; the sounding from the Mesonet's radiosonde archive.