Alert archive / Florida / Tornado Warnings in 2004

Tornado Warning 13, NWS Jacksonville, FL

August 12, 2004Bradford County, Union County, Florida

NWS Jacksonville, FL issued this tornado warning at Aug 12, 2004, 2:33 PM EDT for Bradford County, Union County, Florida. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 12, 2004, 2:33 PM EDT (18:33 UTC)
Expired: Aug 12, 2004, 3:00 PM EDT
In force: 27 min
Issued by: NWS Jacksonville, FL
Area: Counties, with a storm outline in the text

Counties Bradford County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 74 km from the middle of the area, began a volume at 18:34 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.

What was reported inside it

Time	Report	Where	Remark
Aug 12, 3:00 PM EDT	TORNADO	Lawtey, FL	TORNADO SEEN RIPPING UP TREES

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 12, 1:50 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 6.6 hours before the alert went out and 76 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: 877 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
WFUS52 KJAX 121833
TORJAX
FLC007-125-121900-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
233 PM EDT THU AUG 12 2004

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

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

* UNTIL 300 PM EDT

* AT 224 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 5 MILES SOUTH OF LAKE BUTLER...OR ABOUT 4 MILES
  EAST OF WORTHINGTON SPRINGS...MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 300 PM EDT...
  NEW RIVER AND LAKE BUTLER...
  RAIFORD AND STARKE...

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 2992 8205 2987 8232 2991 8237 2999 8242
      3002 8242 3005 8238 3014 8225 3014 8204
      3002 8204
$$

HESS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 3:03 PM EDT	Tornado Warning	JAX	Baker, Clay, Duval	27 min
Aug 12, 3:13 PM EDT	Severe Thunderstorm Warning	JAX	Putnam	47 min
Aug 12, 3:25 PM EDT	Special Marine Warning	JAX		65 min
Aug 12, 3:57 PM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	33 min
Aug 12, 4:01 PM EDT	Tornado Warning	JAX	Duval	44 min
Aug 12, 4:05 PM EDT	Special Marine Warning	JAX		85 min
Aug 12, 4:24 PM EDT	Tornado Warning	JAX	Nassau	21 min
Aug 12, 4:47 PM EDT	Special Marine Warning	JAX		88 min
Aug 12, 5:42 PM EDT	Special Marine Warning	JAX		63 min
Aug 12, 5:55 PM EDT	Tornado Warning	JAX	Flagler	35 min
Aug 12, 5:57 PM EDT	Special Marine Warning	JAX		63 min
Aug 12, 6:52 PM EDT	Special Marine Warning	JAX		68 min
Aug 12, 6:52 PM EDT	Special Marine Warning	JAX		68 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.