Alert archive / Florida / Tornado Warnings in 2004

Tornado Warning 49, NWS Jacksonville, FL

September 6, 2004Clay County, Florida

NWS Jacksonville, FL issued this tornado warning at Sep 6, 2004, 12:17 AM EDT for Clay County, Florida. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 6, 2004, 12:17 AM EDT (04:17 UTC)
Expired: Sep 6, 2004, 1:00 AM EDT
In force: 43 min
Issued by: NWS Jacksonville, FL
Area: Counties, with a storm outline in the text

County Clay County, FL

The radar

The Jacksonville radar (KJAX), 49 km from the middle of the area, began a volume at 04:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 5, 8:35 PM EDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 4.3 hours before the alert went out and 51 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: 498 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 529 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

120 
WFUS52 KJAX 060418
TORJAX
FLC019-060500-
/X.NEW.KJAX.TO.W.0029.040906T0417Z-040906T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1217 AM EDT MON SEP 6 2004

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  CLAY COUNTY IN NORTHEAST FLORIDA

* UNTIL 100 AM EDT

* AT 1207 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 7 MILES SOUTHEAST OF GREEN COVE SPRINGS...OR
  ABOUT 12 MILES SOUTH OF FRUIT COVE...MOVING NORTHWEST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  DOCTORS INLET.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A 
SUBSTANTIAL SHELTER.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT...OR YOU CAN CALL THE NATIONAL
WEATHER SERVICE IN JACKSONVILLE DIRECTLY AT 800-499-1594 TO REPORT
SEVERE WEATHER.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT.

LAT...LON 2994 8165 2990 8168 3018 8202 3018 8183
      3016 8177 3010 8169 3003 8169 2997 8162

$$

ZAPPE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 11:56 PM EDT	Tornado Warning	JAX	Saint Johns	34 min
Sep 6, 2:04 AM EDT	Tornado Warning	JAX	Saint Johns	26 min
Sep 6, 12:51 PM EDT	Special Marine Warning	JAX		54 min
Sep 6, 1:36 PM EDT	Special Marine Warning	JAX		114 min
Sep 6, 3:22 PM EDT	Special Marine Warning	JAX		113 min
Sep 6, 5:10 PM EDT	Special Marine Warning	JAX		95 min
Sep 6, 6:39 PM EDT	Tornado Warning	JAX	Clay, Saint Johns	51 min
Sep 6, 6:51 PM EDT	Tornado Warning	JAX	Putnam	39 min
Sep 6, 7:13 PM EDT	Tornado Warning	JAX	Clay, Saint Johns	47 min
Sep 6, 7:33 PM EDT	Tornado Warning	JAX	Clay	27 min
Sep 6, 7:40 PM EDT	Tornado Warning	JAX	Duval, Saint Johns	50 min

Nearby

Tornado Warnings in Florida, 2004 Every tornado warning in 2004 Tornadoes in 2004

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; radar from the NEXRAD Level II archive.