Alert archive / Florida / Tornado Warnings in 2013

Tornado Warning 8, NWS Melbourne, FL

April 4, 2013Martin County, Florida

NWS Melbourne, FL issued this tornado warning at Apr 4, 2013, 3:12 PM EDT for Martin County, Florida. It was in force for 63 min. 2 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: Apr 4, 2013, 3:12 PM EDT (19:12 UTC)
Expired: Apr 4, 2013, 4:15 PM EDT
In force: 63 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Martin County, FL

The radar

The Melbourne radar (KMLB), 125 km from the middle of the area, began a volume at 19:15 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
Apr 4, 3:50 PM EDT	HAIL 0.7	Hobe Sound, FL	NUMEROUS REPORTS RECEIVED OF PEA TO DIME SIZED HAIL IN HOBE SOUND. NO DAMAGE REPORTED.
Apr 4, 3:55 PM EDT	HAIL 1	1 Nw Tequesta, FL

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 4, 12:14 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 7.2 hours before the alert went out and 140 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: 124 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

128 
WFUS52 KMLB 041912
TORMLB
FLC085-042015-
/O.NEW.KMLB.TO.W.0008.130404T1912Z-130404T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
312 PM EDT THU APR 4 2013

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN MARTIN COUNTY IN FLORIDA...
  THIS INCLUDES THE CITIES OF...PORT SALERNO...JUPITER ISLAND...HOBE
  SOUND...

* UNTIL 415 PM EDT.

* AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 17 MILES WEST OF
  JONATHAN DICKINSON STATE PARK...OR 7 MILES SOUTHEAST OF
  INDIANTOWN...MOVING NORTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WITHAM FIELD...HOBE SOUND BEACH AND SEWALLS POINT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 2723 8018 2721 8015 2717 8015 2716 8015
      2703 8009 2697 8008 2697 8014 2695 8015
      2695 8017 2695 8046
TIME...MOT...LOC 1911Z 234DEG 19KT 2697 8037

$$



BRAGAW

3 follow-up statements

562 
WWUS52 KMLB 041929
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
329 PM EDT THU APR 4 2013

FLC085-042015-
/O.CON.KMLB.TO.W.0008.000000T0000Z-130404T2015Z/
MARTIN-
329 PM EDT THU APR 4 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR EASTERN
MARTIN COUNTY...

AT 324 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 11 MILES WEST OF HOBE
SOUND...OR 10 MILES EAST OF INDIANTOWN...MOVING NORTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
JONATHAN DICKINSON STATE PARK...JUPITER ISLAND...WITHAM FIELD...PORT
SALERNO...HOBE SOUND BEACH...HOBE SOUND WILDLIFE REFUGE AND SEWALLS
POINT

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.

DO NOT USE HIGHWAY OVERPASSES FOR SHELTER. OVERPASSES DO NOT PROVIDE
PROTECTION FROM TORNADIC WINDS. VEHICLES STOPPED UNDER BRIDGES BLOCK
TRAFFIC AND PREVENT PEOPLE FROM GETTING OUT OF THE STORM'S PATH AND
TO SHELTER.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING
FOR EASTERN FLORIDA.

&&

LAT...LON 2723 8018 2721 8015 2717 8015 2716 8015
      2703 8009 2697 8008 2697 8014 2695 8015
      2695 8017 2695 8046
TIME...MOT...LOC 1928Z 234DEG 19KT 2702 8029

$$



BRAGAW

899 
WWUS52 KMLB 041944
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
344 PM EDT THU APR 4 2013

FLC085-042015-
/O.CON.KMLB.TO.W.0008.000000T0000Z-130404T2015Z/
MARTIN-
344 PM EDT THU APR 4 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR EASTERN
MARTIN COUNTY...

AT 338 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR JONATHAN DICKINSON
STATE PARK...OR NEAR HOBE SOUND...MOVING EAST AT 25 MPH.

THE TORNADO WILL BE NEAR...
  HOBE SOUND BEACH AND HOBE SOUND WILDLIFE REFUGE BY 350 PM EDT...
  OFF THE ATLANTIC COAST SOUTH OF PORT SALERNO BY 400 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING
FOR EASTERN FLORIDA.

&&

LAT...LON 2696 8028 2723 8018 2721 8015 2716 8015
      2703 8009 2697 8008 2697 8014 2695 8015
      2695 8017
TIME...MOT...LOC 1943Z 248DEG 23KT 2704 8014

$$



BRAGAW

154 
WWUS52 KMLB 042007
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
407 PM EDT THU APR 4 2013

FLC085-042016-
/O.EXP.KMLB.TO.W.0008.000000T0000Z-130404T2015Z/
MARTIN-
407 PM EDT THU APR 4 2013

...THE TORNADO WARNING FOR EASTERN MARTIN COUNTY WILL EXPIRE AT 415
PM EDT...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND MOVED 
OFF THE COAST SOUTH OF HOBE SOUND...THUS THE WARNING WILL BE ALLOWED 
TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING
FOR EASTERN FLORIDA.

LAT...LON 2696 8028 2723 8018 2721 8015 2716 8015
      2703 8009 2697 8008 2697 8014 2695 8015
      2695 8017
TIME...MOT...LOC 2006Z 248DEG 23KT 2710 7999

$$



BRAGAW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 8:16 PM EDT	Special Weather Statement	MLB	Orange	59 min
Apr 3, 9:19 PM EDT	Special Weather Statement	MLB	Seminole	56 min
Apr 3, 9:35 PM EDT	Special Weather Statement	MLB	Osceola	55 min
Apr 3, 10:03 PM EDT	Special Weather Statement	MLB	Seminole	57 min
Apr 3, 10:16 PM EDT	Tornado Warning	MLB	Brevard, Orange	59 min
Apr 3, 10:25 PM EDT	Special Marine Warning	MLB		110 min
Apr 4, 4:36 AM EDT	Small Craft Advisory	MLB		23 hr
Apr 4, 3:01 PM EDT	Special Marine Warning	MLB		119 min
Apr 4, 3:03 PM EDT	Special Weather Statement	MLB	Martin	57 min
Apr 4, 3:29 PM EDT	Special Weather Statement	MLB	Okeechobee, Saint Lucie	61 min
Apr 4, 3:34 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee, Saint Lucie	56 min
Apr 4, 3:50 PM EDT	Special Marine Warning	MLB		115 min
Apr 4, 4:31 PM EDT	Special Weather Statement	MLB	Martin	29 min

Nearby

Tornado Warnings in Florida, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.