Alert archive / Florida / Tornado Warnings in 2004

Tornado Warning 2, NWS Jacksonville, FL

July 11, 2004Bradford County, Florida

NWS Jacksonville, FL issued this tornado warning at Jul 11, 2004, 4:36 PM EDT for Bradford County, Florida. It was in force for 24 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: Jul 11, 2004, 4:36 PM EDT (20:36 UTC)
Expired: Jul 11, 2004, 5:00 PM EDT
In force: 24 min
Issued by: NWS Jacksonville, FL
Area: Counties, with a storm outline in the text

County Bradford County, FL

The radar

The Jacksonville radar (KJAX), 82 km from the middle of the area, began a volume at 20:38 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 nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.6 hours before the alert went out and 84 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: 1881 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1151 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WFUS52 KJAX 112036
TORJAX
FLC007-112100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
436 PM EDT SUN JUL 11 2004

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  BRADFORD COUNTY IN NORTHERN FLORIDA

* UNTIL 500 PM EDT

* AT 433 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 3 MILES WEST OF SAMPSON...OR ABOUT 9 MILES
  SOUTHEAST OF LAKE BUTLER...MOVING SOUTH AT 10 MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 500 PM EDT...
  SAMPSON AND NEW RIVER...

INTENSE LIGHTNING IS OCCURRING WITH THE PARENT STORM. IF OUTDOORS...
STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE.

PEOPLE OUTSIDE SHOULD MOVE TO A BUILDING OR STRUCTURE WHICH WILL
PROVIDE ADEQUATE PROTECTION. MOBILE HOMES AND TRAILERS DO NOT PROVIDE
ADEQUATE PROTECTION FROM A SEVERE STORM.

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.

LAT...LON 2986 8218 2986 8228 2988 8233 2988 8237
      2993 8235 2999 8226 2999 8215 2999 8215
      2984 8215
$$

PETERSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 2:51 PM EDT	Severe Thunderstorm Warning	JAX	Duval	39 min
Jul 11, 3:03 PM EDT	Severe Thunderstorm Warning	JAX	Marion	42 min
Jul 11, 3:07 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Saint Johns	38 min
Jul 11, 4:04 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Union	41 min
Jul 11, 4:07 PM EDT	Severe Thunderstorm Warning	JAX	Bradford, Clay	38 min
Jul 11, 4:37 PM EDT	Severe Thunderstorm Warning	JAX	Alachua	53 min
Jul 11, 4:49 PM EDT	Tornado Warning	JAX	Alachua	26 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.