Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 13, NWS Jacksonville, FL

March 30, 2011Flagler County, Florida

NWS Jacksonville, FL issued this tornado warning at Mar 30, 2011, 4:37 PM EDT for Flagler County, Florida. It was in force for 23 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: Mar 30, 2011, 4:37 PM EDT (20:37 UTC)
Expired: Mar 30, 2011, 5:00 PM EDT
In force: 23 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Flagler County, FL

The radar

The Jacksonville radar (KJAX), 129 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 watch it was issued in

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

Issued	Product	Office	Lasted
Mar 30, 11:10 AM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 8.6 hours before the alert went out and 127 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: 305 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 800 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

996 
WFUS52 KJAX 302037
TORJAX
FLC035-302100-
/O.NEW.KJAX.TO.W.0013.110330T2037Z-110330T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
437 PM EDT WED MAR 30 2011

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN FLAGLER COUNTY IN NORTHEAST FLORIDA

* UNTIL 500 PM EDT

* AT 437 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 23
  MILES SOUTHWEST OF FLAGLER BEACH...OR NEAR PIERSON...MOVING EAST AT
  45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  FLAGLER BEACH.

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 2941 8115 2928 8114 2926 8141 2930 8142
      2939 8142 2939 8144 2940 8147 2942 8146
      2948 8111 2945 8110 2943 8110
TIME...MOT...LOC 2037Z 249DEG 41KT 2932 8139

$$

WOLF

2 follow-up statements

577 
WWUS52 KJAX 302054
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
454 PM EDT WED MAR 30 2011

FLC035-302100-
/O.CON.KJAX.TO.W.0013.000000T0000Z-110330T2100Z/
FLAGLER FL-
454 PM EDT WED MAR 30 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR
SOUTHERN FLAGLER COUNTY...

AT 454 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
TRACK A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS STORM WAS 
LOCATED 10 MILES SOUTHWEST OF FLAGLER BEACH...OR 7 MILES SOUTH OF 
BUNNELL...MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FLAGLER
BEACH.

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 2941 8115 2928 8114 2926 8141 2930 8141
      2940 8135 2942 8134 2943 8131 2945 8126
      2948 8111 2945 8110 2943 8110
TIME...MOT...LOC 2054Z 249DEG 46KT 2939 8117

$$

WOLF

982 
WWUS52 KJAX 302104
SVSJAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
504 PM EDT WED MAR 30 2011

FLC035-302115-
/O.EXP.KJAX.TO.W.0013.000000T0000Z-110330T2100Z/
FLAGLER FL-
504 PM EDT WED MAR 30 2011

...THE TORNADO WARNING FOR SOUTHEASTERN FLAGLER COUNTY HAS EXPIRED...

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

LAT...LON 2941 8115 2928 8114 2926 8141 2930 8141
      2940 8135 2942 8134 2943 8131 2945 8126
      2948 8111 2945 8110 2943 8110
TIME...MOT...LOC 2054Z 249DEG 46KT 2939 8117

$$

WOLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 2:17 PM EDT	Special Marine Warning	JAX		118 min
Mar 30, 2:42 PM EDT	Special Weather Statement	JAX	Columbia, Gilchrist	63 min
Mar 30, 2:52 PM EDT	Tornado Warning	JAX	Columbia, Suwannee	38 min
Mar 30, 3:23 PM EDT	Special Weather Statement	JAX	Alachua, Marion	52 min
Mar 30, 3:27 PM EDT	Tornado Warning	JAX	Baker, Columbia, Union	48 min
Mar 30, 3:47 PM EDT	Tornado Warning	JAX	Marion	58 min
Mar 30, 4:02 PM EDT	Special Marine Warning	JAX		118 min
Mar 30, 4:06 PM EDT	Tornado Warning	JAX	Flagler, Putnam, Saint Johns	39 min
Mar 30, 4:06 PM EDT	Tornado Warning	JAX	Bradford, Clay, Duval, Nassau, Saint Johns	54 min
Mar 30, 4:15 PM EDT	Special Marine Warning	JAX		2 hr

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.