Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 26, NWS Jacksonville, FL

October 19, 2011Marion County, Florida

NWS Jacksonville, FL issued this tornado warning at Oct 19, 2011, 3:46 AM EDT for Marion County, Florida. It was in force for 44 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: Oct 19, 2011, 3:46 AM EDT (07:46 UTC)
Expired: Oct 19, 2011, 4:30 AM EDT
In force: 44 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Marion County, FL

The radar

The Jacksonville radar (KJAX), 148 km from the middle of the area, began a volume at 07:49 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 00:00Z, 7.8 hours before the alert went out and 150 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: 490 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 726 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

534 
WFUS52 KJAX 190746
TORJAX
FLC083-190830-
/O.NEW.KJAX.TO.W.0026.111019T0746Z-111019T0830Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
346 AM EDT WED OCT 19 2011

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN MARION COUNTY IN NORTHERN FLORIDA

* UNTIL 430 AM EDT

* AT 347 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7
  MILES SOUTHWEST OF SANTOS...OR 10 MILES SOUTH OF OCALA...MOVING
  EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SANTOS...LAKE WEIR...SILVER SPRINGS SHORES...WEIRSDALE...
  OCKLAWAHA...SALT SPRINGS...MOSS BLUFF...LYNNE AND JUNIPER SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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 2912 8227 2938 8174 2936 8166 2933 8168
      2928 8164 2905 8163 2904 8165 2896 8166
      2895 8221
TIME...MOT...LOC 0747Z 253DEG 20KT 2905 8217

$$

HESS

3 follow-up statements

173 
WWUS52 KJAX 190756
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
356 AM EDT WED OCT 19 2011

FLC083-190830-
/O.CON.KJAX.TO.W.0026.000000T0000Z-111019T0830Z/
MARION FL-
356 AM EDT WED OCT 19 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR
SOUTHEASTERN MARION COUNTY...

AT 356 AM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION.  THIS TORNADO WAS LOCATED
NEAR SANTOS...OR 8 MILES SOUTH OF OCALA...MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BELLEVIEW...SUMMERFIELD...LAKE WEIR...SILVER SPRINGS SHORES...
WEIRSDALE...OCKLAWAHA...MOSS BLUFF...LYNNE...SALT SPRINGS AND JUNIPER
SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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 2914 8220 2937 8174 2936 8166 2933 8168
      2928 8164 2905 8163 2904 8165 2896 8166
      2895 8216
TIME...MOT...LOC 0756Z 252DEG 25KT 2907 8208

$$

HESS

744 
WWUS52 KJAX 190809
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
409 AM EDT WED OCT 19 2011

FLC083-190830-
/O.CON.KJAX.TO.W.0026.000000T0000Z-111019T0830Z/
MARION FL-
409 AM EDT WED OCT 19 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR
SOUTHEASTERN MARION COUNTY...

AT 409 AM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION.  THIS TORNADO WAS LOCATED
NEAR MOSS BLUFF...OR NEAR LYNNE...MOVING NORTHEAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LYNNE...JUNIPER SPRINGS AND SALT SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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 2922 8205 2937 8174 2936 8166 2933 8168
      2928 8164 2905 8163 2904 8165 2896 8166
      2895 8201
TIME...MOT...LOC 0809Z 247DEG 38KT 2913 8191

$$

HESS

750 
WWUS52 KJAX 190824
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
424 AM EDT WED OCT 19 2011

FLC083-190834-
/O.EXP.KJAX.TO.W.0026.000000T0000Z-111019T0830Z/
MARION FL-
424 AM EDT WED OCT 19 2011

...THE TORNADO WARNING FOR SOUTHEASTERN MARION COUNTY WILL EXPIRE AT
430 AM EDT...

ALTHOUGH THE WARNING IS NO LONGER IN EFFECT GUSTY WINDS OF 45 TO 55 
MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE.

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

LAT...LON 2922 8205 2937 8174 2936 8166 2933 8168
      2928 8164 2905 8163 2904 8165 2896 8166
      2895 8201
TIME...MOT...LOC 0824Z 247DEG 38KT 2919 8174

$$

HESS

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 19, 2:21 AM EDT	Special Weather Statement	JAX	Putnam	54 min
Oct 19, 2:22 AM EDT	Special Weather Statement	JAX	Marion	53 min
Oct 19, 2:56 AM EDT	Tornado Warning	JAX	Marion	49 min
Oct 19, 3:00 AM EDT	Special Weather Statement	JAX	Marion	45 min
Oct 19, 3:51 AM EDT	Special Weather Statement	JAX	Putnam	39 min
Oct 19, 3:53 AM EDT	Lake Wind Advisory	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	15 hr
Oct 19, 4:23 AM EDT	Special Weather Statement	JAX	Flagler	52 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.