Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 22, NWS Jacksonville, FL

October 10, 2011Duval County, Florida

NWS Jacksonville, FL issued this tornado warning at Oct 10, 2011, 4:15 AM EDT for Duval County, Florida. It was in force for 30 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: Oct 10, 2011, 4:15 AM EDT (08:15 UTC)
Expired: Oct 10, 2011, 4:45 AM EDT
In force: 30 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Duval County, FL

The radar

The Jacksonville radar (KJAX), 5 km from the middle of the area, began a volume at 08:17 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.

What was reported inside it

Time	Report	Where	Remark
Oct 10, 4:20 AM EDT	TORNADO	3 Nnw Mayport, FL	PARK OFFICIAL REPORTED POSSIBLE TORNADO WITH SEVERAL TREES DOWN BLOCKING FORT GEORGE ROAD AND PALMETTO ROAD. A MOBILE HOME SUSTAINED MINOR DAMAGE WITH AWNING TORN OFF.

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

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 8.3 hours before the alert went out and 5 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: 277 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 665 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -74 m²/s²
0-3 km storm-relative helicity: -46 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.

829 
WFUS52 KJAX 100815
TORJAX
FLC031-100845-
/O.NEW.KJAX.TO.W.0022.111010T0815Z-111010T0845Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
415 AM EDT MON OCT 10 2011

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN DUVAL COUNTY IN NORTHEAST FLORIDA

* UNTIL 445 AM EDT

* AT 415 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  MAYPORT...MOVING WEST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FORT
  CAROLINE...OCEANWAY AND JACKSONVILLE INTERNATIONAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT.

&&

LAT...LON 3038 8189 3042 8189 3050 8180 3050 8178
      3055 8173 3057 8169 3055 8166 3056 8166
      3054 8155 3053 8155 3052 8144 3050 8142
      3048 8140 3032 8138
TIME...MOT...LOC 0815Z 100DEG 33KT 3042 8143

$$

TRABERT

1 follow-up statement

126 
WWUS52 KJAX 100838
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
438 AM EDT MON OCT 10 2011

FLC031-100848-
/O.EXP.KJAX.TO.W.0022.000000T0000Z-111010T0845Z/
DUVAL FL-
438 AM EDT MON OCT 10 2011

...THE TORNADO WARNING FOR NORTHERN DUVAL COUNTY WILL EXPIRE AT 445
AM EDT...

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT MONDAY AFTERNOON
FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

LAT...LON 3038 8189 3042 8189 3050 8180 3050 8178
      3055 8173 3057 8169 3055 8166 3056 8166
      3054 8155 3053 8155 3052 8144 3050 8142
      3048 8140 3032 8138
TIME...MOT...LOC 0838Z 100DEG 33KT 3046 8167

$$

TRABERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 8:29 PM EDT	High Wind Warning	JAX	Flagler, Nassau	8 hr
Oct 9, 8:29 PM EDT	Lake Wind Advisory	JAX	Baker, Bradford, Gilchrist, Suwannee, Union	13 hr
Oct 9, 9:25 PM EDT	Gale Warning	JAX		13 hr
Oct 9, 9:25 PM EDT	Storm Warning	JAX		7 hr
Oct 9, 10:57 PM EDT	Special Weather Statement	JAX	Putnam	48 min
Oct 9, 11:53 PM EDT	Special Weather Statement	JAX	Clay, Marion, Putnam	37 min
Oct 10, 12:29 AM EDT	Special Weather Statement	JAX	Alachua, Bradford, Clay	46 min
Oct 10, 1:19 AM EDT	Special Weather Statement	JAX	Clay, Putnam	56 min
Oct 10, 1:59 AM EDT	Special Weather Statement	JAX	Alachua, Bradford, Union	61 min
Oct 10, 2:36 AM EDT	Special Weather Statement	JAX	Bradford, Clay	24 min
Oct 10, 2:51 AM EDT	Areal Flood Advisory	JAX	Alachua, Marion	114 min
Oct 10, 3:11 AM EDT	Tornado Warning	JAX	Baker, Bradford, Clay, Union	31 min
Oct 10, 3:36 AM EDT	Special Weather Statement	JAX	Marion	39 min
Oct 10, 3:47 AM EDT	Special Weather Statement	JAX	Union	28 min
Oct 10, 4:01 AM EDT	Special Weather Statement	JAX	Marion	29 min
Oct 10, 4:37 AM EDT	Areal Flood Warning	JAX	Marion	113 min
Oct 10, 4:46 AM EDT	Special Weather Statement	JAX	Nassau	44 min
Oct 10, 4:49 AM EDT	Special Weather Statement	JAX	Bradford, Clay, Gilchrist, Union	41 min
Oct 10, 5:24 AM EDT	Special Weather Statement	JAX	Alachua, Putnam	51 min
Oct 10, 6:13 AM EDT	Special Weather Statement	JAX	Alachua, Baker, Bradford, Columbia, Gilchrist, Hamilton and 2 more	62 min
Oct 10, 6:15 AM EDT	Special Weather Statement	JAX	Duval, Nassau	60 min
Oct 10, 6:41 AM EDT	Tornado Warning	JAX	Nassau	23 min
Oct 10, 7:12 AM EDT	Special Weather Statement	JAX	Nassau	48 min
Oct 10, 7:21 AM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	39 min
Oct 10, 7:23 AM EDT	Special Weather Statement	JAX	Gilchrist	52 min
Oct 10, 8:38 AM EDT	Special Marine Warning	JAX		97 min
Oct 10, 8:41 AM EDT	Areal Flood Advisory	JAX	Gilchrist	2 hr
Oct 10, 9:17 AM EDT	Lake Wind Advisory	JAX	Nassau	3 hr
Oct 10, 10:04 AM EDT	Small Craft Advisory	JAX		11 hr
Oct 10, 12:27 PM EDT	Areal Flood Advisory	JAX	Suwannee	2 hr
Oct 10, 2:16 PM EDT	Small Craft Advisory for Hazardous Seas	JAX		32 hr
Oct 10, 6:15 PM EDT	Areal Flood Advisory	JAX	Putnam	90 min
Oct 10, 7:10 PM EDT	Special Weather Statement	JAX	Putnam	50 min
Oct 10, 7:50 PM EDT	Areal Flood Advisory	JAX	Nassau	115 min

Nearby

Tornado Warnings in Florida, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.