Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 18, NWS Jacksonville, FL

September 5, 2011Columbia County, Hamilton County, Suwannee County, Florida; Echols County, Georgia

NWS Jacksonville, FL issued this tornado warning at Sep 5, 2011, 5:41 PM EDT for Columbia County, Hamilton County, Suwannee County, Florida; Echols County, Georgia. It was in force for 34 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 5, 2011, 5:41 PM EDT (21:41 UTC)
Expired
Sep 5, 2011, 6:15 PM EDT
In force
34 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Columbia County, FL, Hamilton County, FL, Suwannee County, FL, Echols County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.7 hours before the alert went out and 107 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-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 2011-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1299 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 2011-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1299 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
58 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.

624 
WFUS52 KJAX 052141
TORJAX
FLC023-047-121-GAC101-052215-
/O.NEW.KJAX.TO.W.0018.110905T2141Z-110905T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
541 PM EDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN ECHOLS COUNTY IN SOUTHEAST GEORGIA
  NORTHERN COLUMBIA COUNTY IN NORTHERN FLORIDA
  EASTERN HAMILTON COUNTY IN NORTHERN FLORIDA
  NORTHEASTERN SUWANNEE COUNTY IN NORTHERN FLORIDA

* UNTIL 615 PM EDT

* AT 541 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  SUWANNEE SPRINGS...MOVING NORTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BELMONT AND NEEDMORE.

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 3075 8282 3067 8259 3028 8282 3036 8300
TIME...MOT...LOC 2141Z 209DEG 30KT 3040 8285

$$

SHASHY
1 follow-up statement
675 
WWUS52 KJAX 052155
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
555 PM EDT MON SEP 5 2011

FLC121-052205-
/O.CAN.KJAX.TO.W.0018.000000T0000Z-110905T2215Z/
SUWANNEE FL-
555 PM EDT MON SEP 5 2011

...THE TORNADO WARNING FOR NORTHEASTERN SUWANNEE COUNTY IS
CANCELLED...

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

LAT...LON 3040 8277 3045 8288 3075 8282 3067 8259
TIME...MOT...LOC 2155Z 209DEG 30KT 3050 8278

$$

FLC023-047-GAC101-052215-
/O.CON.KJAX.TO.W.0018.000000T0000Z-110905T2215Z/
ECHOLS GA-COLUMBIA FL-HAMILTON FL-
555 PM EDT MON SEP 5 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR EASTERN
HAMILTON...NORTHERN COLUMBIA AND SOUTHEASTERN ECHOLS COUNTIES...

AT 555 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
TRACK A TORNADO.  THIS TORNADO WAS LOCATED NEAR BELMONT...OR 9 MILES
NORTHEAST OF SUWANNEE SPRINGS...MOVING NORTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BELMONT
AND NEEDMORE.

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 3040 8277 3045 8288 3075 8282 3067 8259
TIME...MOT...LOC 2155Z 209DEG 30KT 3050 8278

$$

SHASHY

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 10:14 PM EDTSpecial Weather StatementJAXGilchrist46 min
Sep 4, 11:03 PM EDTSpecial Weather StatementJAXColumbia, Suwannee, Union27 min
Sep 5, 4:02 AM EDTLake Wind AdvisoryJAXBaker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more16 hr
Sep 5, 3:13 PM EDTSpecial Weather StatementJAXDuval27 min
Sep 5, 3:16 PM EDTSpecial Marine WarningJAX59 min
Sep 5, 3:21 PM EDTSpecial Weather StatementJAXMarion39 min
Sep 5, 3:30 PM EDTSpecial Weather StatementJAXSaint Johns45 min
Sep 5, 4:00 PM EDTSevere Thunderstorm WarningJAXHamilton, Suwannee45 min
Sep 5, 4:16 PM EDTSpecial Weather StatementJAXPutnam44 min
Sep 5, 4:18 PM EDTSpecial Marine WarningJAX27 min
Sep 5, 4:38 PM EDTSpecial Marine WarningJAX82 min
Sep 5, 4:52 PM EDTSpecial Weather StatementJAXAlachua, Baker, Columbia, Union38 min
Sep 5, 5:17 PM EDTSpecial Weather StatementJAXColumbia, Hamilton, Suwannee43 min
Sep 5, 5:27 PM EDTSpecial Weather StatementJAXBaker48 min
Sep 5, 5:34 PM EDTSevere Thunderstorm WarningJAXColumbia, Hamilton, Suwannee41 min
Sep 5, 5:58 PM EDTSevere Thunderstorm WarningJAXAlachua, Bradford, Columbia, Gilchrist, Suwannee, Union47 min
Sep 5, 6:14 PM EDTTornado WarningJAXColumbia, Hamilton31 min
Sep 5, 6:20 PM EDTSpecial Weather StatementJAXBaker40 min
Sep 5, 6:42 PM EDTSevere Thunderstorm WarningJAXAlachua, Baker, Bradford, Columbia, Union32 min
Sep 5, 7:05 PM EDTSpecial Weather StatementJAXMarion40 min
Sep 5, 7:59 PM EDTSevere Thunderstorm WarningJAXColumbia, Hamilton, Suwannee46 min
Sep 5, 2:52 PM EDTSpecial Weather StatementJAXBrantley53 min
Sep 5, 3:08 PM EDTSpecial Weather StatementJAXCoffee, Jeff Davis67 min
Sep 5, 3:19 PM EDTSpecial Weather StatementJAXCamden, Glynn26 min
Sep 5, 3:33 PM EDTSpecial Weather StatementJAXWayne42 min
Sep 5, 3:49 PM EDTSpecial Weather StatementJAXGlynn26 min
Sep 5, 4:20 PM EDTSpecial Weather StatementJAXAtkinson, Coffee40 min
Sep 5, 4:37 PM EDTSevere Thunderstorm WarningJAXAtkinson, Clinch, Echols23 min
Sep 5, 4:59 PM EDTSevere Thunderstorm WarningJAXAtkinson, Clinch, Ware31 min
Sep 5, 5:23 PM EDTSevere Thunderstorm WarningJAXAppling, Atkinson, Bacon, Coffee, Jeff Davis, Ware52 min
Sep 5, 6:18 PM EDTSpecial Weather StatementJAXClinch27 min

Nearby

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