Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 30, NWS Melbourne, FL

October 29, 2011Martin County, Florida

NWS Melbourne, FL issued this tornado warning at Oct 29, 2011, 8:29 AM EDT for Martin County, Florida. It was in force for 61 min. 4 reports 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 29, 2011, 8:29 AM EDT (12:29 UTC)
Expired: Oct 29, 2011, 9:30 AM EDT
In force: 61 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Martin County, FL

The radar

The Melbourne radar (KMLB), 131 km from the middle of the area, began a volume at 12:31 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 29, 9:10 AM EDT	TSTM WND DMG	1 Nnw Hobe Sound, FL	MARTIN COUNTY SHERIFF RELAYED REPORT OF TREES DOWN ON ROADWAY NEAR DIXIE HIGHWAY NORTH OF PETTWAY ST.
Oct 29, 9:10 AM EDT	TSTM WND DMG	3 Nnw Hobe Sound, FL	MARTIN COUNTY SHERIFF RELAYED REPORT OF CARPORTS TORN OFF, TREES DOWN AND OTHER PROPERTY DAMAGE IN VICINITY OF RIDGEWAY MOBILE HOME PARK. TIME ESTIMATED BASED ON RADAR. POSSIBLE TORNADO.
Oct 29, 9:10 AM EDT	TSTM WND DMG	3 Nnw Hobe Sound, FL	ROOFS BLOWN OFF CARPORTS ON OSPREY STREET EAST OF HIGHWAY US IN RIDGEWAY MOBILE HOME PARK. TIME ESTIMATED BASED ON RADAR. POSSIBLE TORNADO.
Oct 29, 9:22 AM EDT	TORNADO	3 Nnw Hobe Sound, FL	TORNADO. PATH LENGTH 0.1 MILES 25 YARDS WIDE RATING EF-0 WITH MAX WINDS 65 TO 70 MPH REMOVED A ROOF FROM MOBILE HOME AND BLEW IT 50 YARDS. SEVERAL HOMES IN THE AREA HAD MINOR DAMAGE. A LARGE PALM TREE WAS UPROOTED AND MANY SMALL TREES WERE DOWNED IN THE SAME L

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

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 0.5 hours before the alert went out and 131 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: 1724 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 485 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.8

Open this sounding in Storm Lab

The text

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

093 
WFUS52 KMLB 291229
TORMLB
FLC085-291330-
/O.NEW.KMLB.TO.W.0030.111029T1229Z-111029T1330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
829 AM EDT SAT OCT 29 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MARTIN COUNTY IN FLORIDA...
  THIS INCLUDES THE CITY OF HOBE SOUND...

* UNTIL 930 AM EDT.

* AT 827 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 19 MILES WEST OF
  JONATHAN DICKINSON STATE PARK...OR NEAR INDIANTOWN...MOVING
  NORTHEAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  JOHNATHAN DICKINSON STATE PARK...JUPITER ISLAND AND HOBE SOUND
  BEACH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A STRONG BUILDING ON
THE LOWEST FLOOR...IN AN INTERIOR ROOM SUCH AS A BATHROOM OR CLOSET.
KEEP AWAY FROM WINDOWS. GET UNDER A WORKBENCH OR OTHER PIECE OF
STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY.

EVACUATE MOBILE HOMES OR VEHICLES FOR MORE SUBSTANTIAL SHELTER.

&&

LAT...LON 2701 8047 2711 8013 2703 8009 2697 8007
      2697 8014 2695 8015 2695 8017 2695 8046
TIME...MOT...LOC 1229Z 247DEG 21KT 2696 8041

$$

SEDLOCK

3 follow-up statements

040 
WWUS52 KMLB 291243
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
843 AM EDT SAT OCT 29 2011

FLC085-291330-
/O.CON.KMLB.TO.W.0030.000000T0000Z-111029T1330Z/
MARTIN-
843 AM EDT SAT OCT 29 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 AM EDT FOR
SOUTHEASTERN MARTIN COUNTY...

AT 840 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A TORNADO.  THIS TORNADO WAS LOCATED 15 MILES WEST OF JONATHAN
DICKINSON STATE PARK...OR 7 MILES EAST OF INDIANTOWN...MOVING
NORTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
JOHNATHAN DICKINSON STATE PARK...HOBE SOUND...JUPITER ISLAND...HOBE
SOUND BEACH AND HOBE SOUND WILDLIFE REFUGE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A STRONG BUILDING ON
THE LOWEST FLOOR...IN AN INTERIOR ROOM SUCH AS A BATHROOM OR CLOSET.
KEEP AWAY FROM WINDOWS. GET UNDER A WORKBENCH OR OTHER PIECE OF
STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY.

EVACUATE MOBILE HOMES OR VEHICLES FOR MORE SUBSTANTIAL SHELTER.

&&

LAT...LON 2703 8040 2711 8013 2703 8009 2697 8007
      2697 8014 2695 8015 2695 8037
TIME...MOT...LOC 1242Z 236DEG 18KT 2701 8035

$$

SEDLOCK

651 
WWUS52 KMLB 291256
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
856 AM EDT SAT OCT 29 2011

FLC085-291330-
/O.CON.KMLB.TO.W.0030.000000T0000Z-111029T1330Z/
MARTIN-
856 AM EDT SAT OCT 29 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 AM EDT FOR EAST
CENTRAL MARTIN COUNTY...

AT 853 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A TORNADO.  THIS TORNADO WAS LOCATED 10 MILES WEST OF HOBE
SOUND...OR 9 MILES SOUTH OF PALM CITY...MOVING NORTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JUPITER
ISLAND...HOBE SOUND BEACH AND HOBE SOUND WILDLIFE REFUGE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A STRONG BUILDING ON
THE LOWEST FLOOR...IN AN INTERIOR ROOM SUCH AS A BATHROOM OR CLOSET.
KEEP AWAY FROM WINDOWS. GET UNDER A WORKBENCH OR OTHER PIECE OF
STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY.

EVACUATE MOBILE HOMES OR VEHICLES FOR MORE SUBSTANTIAL SHELTER.

&&

LAT...LON 2703 8010 2703 8011 2703 8014 2699 8029
      2706 8031 2711 8013 2703 8009
TIME...MOT...LOC 1256Z 236DEG 18KT 2705 8028

$$

SEDLOCK

127 
WWUS52 KMLB 291324
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
924 AM EDT SAT OCT 29 2011

FLC085-291334-
/O.EXP.KMLB.TO.W.0030.000000T0000Z-111029T1330Z/
MARTIN-
924 AM EDT SAT OCT 29 2011

...THE TORNADO WARNING FOR EAST CENTRAL MARTIN COUNTY WILL EXPIRE AT
930 AM EDT...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD EXITED THE WARNING 
AREA...THUS THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 2703 8010 2703 8011 2703 8014 2699 8029
      2706 8031 2711 8013 2703 8009
TIME...MOT...LOC 1324Z 236DEG 18KT 2713 8015

$$

SEDLOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 29, 8:12 AM EDT	Special Weather Statement	MLB	Martin	48 min
Oct 29, 8:53 AM EDT	Special Marine Warning	MLB		82 min
Oct 29, 9:10 AM EDT	Tornado Warning	MLB	Martin	19 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.