Alert archive / Florida / Tornado Warnings in 2012

Tornado Warning 29, NWS Melbourne, FL

December 10, 2012Seminole County, Volusia County, Florida

NWS Melbourne, FL issued this tornado warning at Dec 10, 2012, 5:09 PM EST for Seminole County, Volusia County, Florida. It was in force for 21 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: Dec 10, 2012, 5:09 PM EST (22:09 UTC)
Expired: Dec 10, 2012, 5:30 PM EST
In force: 21 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Seminole County, FL, Volusia County, FL

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.2 hours before the alert went out and 86 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: 9 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

850 
WFUS52 KMLB 102209
TORMLB
FLC117-127-102230-
/O.NEW.KMLB.TO.W.0029.121210T2209Z-121210T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
509 PM EST MON DEC 10 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL SEMINOLE COUNTY IN FLORIDA...
  THIS INCLUDES THE CITY OF SANFORD...
  SOUTH CENTRAL VOLUSIA COUNTY IN FLORIDA...
  THIS INCLUDES THE CITIES OF...LAKE MONROE...DELTONA...

* UNTIL 530 PM EST.

* AT 502 PM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR SANFORD
  ...MOVING NORTHEAST AT 30 MPH.

* THIS STORM HAS A A HISTORY OF PRODUCING A TORNADO NEAR THE APOPKA 
AREA AND WILL BE MOVING INTO THE AREA ALREADY COVERED BY A TORNADO 
WARNING SHORTLY.

THE IMMEDIATE DANGER OF A TORNADO IS HIGH. PEOPLE IN THE PATH OF THIS
DEVELOPING TORNADO ARE URGED TO QUICKLY PREPARE FOR ITS APPROACH.
THIS IS A DANGEROUS SITUATION! ACT NOW AS SECONDS CAN SAVE LIVES!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

IF YOU ARE DRIVING AND YOU SEE A TORNADO IN THE DISTANCE IN FRONT OF
YOU...SAFELY PULL TO THE SIDE OF THE ROAD WITHOUT BLOCKING TRAFFIC.
DETERMINE IF THE TORNADO IS APPROACHING AND BE PREPARED TO ACT. IF A
TORNADO IS IN THE DISTANCE BEHIND YOU...KEEP DRIVING AWAY FROM THE
TORNADO AS LONG AS YOU ARE FAMILIAR WITH AREA ROADS. IMPORTANTLY...IF
THE TORNADO IS NEARBY...IN ANY DIRECTION...ABANDON YOUR VEHICLE. DO
NOT TRY TO OUTRUN A NEARBY TORNADO.

AN INTERIOR ROOM ON THE LOWEST FLOOR OF THE CLOSEST STURDY BUILDING
OFFERS THE BEST PROTECTION FROM TORNADOES. MOBILE HOMES OFFER LITTLE
PROTECTION.

&&

LAT...LON 2898 8121 2907 8110 2884 8122 2870 8129
      2885 8135
TIME...MOT...LOC 2208Z 249DEG 26KT 2882 8123

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 10, 2:53 PM EST	Special Weather Statement	MLB	Okeechobee	52 min
Dec 10, 3:39 PM EST	Special Weather Statement	MLB	Indian River, Okeechobee	51 min
Dec 10, 3:50 PM EST	Special Weather Statement	MLB	Orange, Seminole	55 min
Dec 10, 4:13 PM EST	Tornado Warning	MLB	Lake, Orange, Seminole	47 min
Dec 10, 4:28 PM EST	Tornado Warning	MLB	Seminole, Volusia	47 min
Dec 10, 4:29 PM EST	Special Weather Statement	MLB	Saint Lucie	46 min
Dec 10, 4:33 PM EST	Special Marine Warning	MLB		117 min
Dec 10, 4:42 PM EST	Tornado Warning	MLB	Indian River, Saint Lucie	48 min
Dec 10, 4:59 PM EST	Tornado Warning	MLB	Seminole, Volusia	46 min
Dec 10, 5:02 PM EST	Tornado Warning	MLB	Volusia	43 min
Dec 10, 5:08 PM EST	Severe Thunderstorm Warning	MLB	Volusia	37 min
Dec 10, 5:23 PM EST	Special Marine Warning	MLB		112 min

Nearby

Tornado Warnings in Florida, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.