Alert archive / Florida / Tornado Warnings in 2009

Tornado Warning 9, NWS Melbourne, FL

April 14, 2009Saint Lucie County, Florida

NWS Melbourne, FL issued this tornado warning at Apr 14, 2009, 2:13 PM EDT for Saint Lucie County, Florida. It was in force for 13 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: Apr 14, 2009, 2:13 PM EDT (18:13 UTC)
Expired: Apr 14, 2009, 2:26 PM EDT
In force: 13 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 86 km from the middle of the area, began a volume at 18:14 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 nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 6.2 hours before the alert went out and 120 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: 101 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 155 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.

000 
WFUS52 KMLB 141813
TORMLB
FLC111-141845-
/O.NEW.KMLB.TO.W.0009.090414T1813Z-090414T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
213 PM EDT TUE APR 14 2009

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN ST. LUCIE COUNTY IN FLORIDA...
  THIS INCLUDES THE CITIES OF...WALTON...FORT PIERCE INLET...WHITE
  CITY...PORT SAINT LUCIE...INDRIO...FORT PIERCE...

* UNTIL 245 PM EDT.

* AT 212 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR SAINT LUCIE
  WEST...OR 8 MILES WEST OF WHITE CITY...MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  SAINT LUCIE WEST BY 220 PM EDT...
  WHITE CITY AND PORT SAINT LUCIE RIVER PARK BY 230 PM EDT...
  FORT PIERCE AND INDIAN RIVER ESTATES BY 235 PM EDT...
  FORT PIERCE INLET AND SAINT LUCIE NUCLEAR PLANT BY 240 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2729 8023 2733 8024 2734 8026 2727 8024
      2726 8049 2756 8054 2756 8053 2756 8032
      2750 8030 2750 8029 2744 8027 2740 8025
      2729 8020
TIME...MOT...LOC 1812Z 248DEG 23KT 2735 8047

$$

52

1 follow-up statement

000 
WWUS52 KMLB 141826
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
226 PM EDT TUE APR 14 2009

FLC111-141834-
/O.CAN.KMLB.TO.W.0009.000000T0000Z-090414T1845Z/
ST. LUCIE-
226 PM EDT TUE APR 14 2009

...THE TORNADO WARNING FOR EASTERN ST. LUCIE COUNTY IS CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE STORM
THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER CAPABLE OF 
PRODUCING A TORNADO. AS A RESULT...THE WARNING HAS BEEN CANCELLED. 
HOWEVER...HEAVY RAIN...GUSTY WINDS AND DANGEROUS LIGHTNING STRIKES WILL 
CONTINUE TO BE POSSIBLE.

LAT...LON 2729 8023 2733 8024 2734 8026 2727 8024
      2726 8049 2756 8054 2756 8053 2756 8032
      2750 8030 2750 8029 2744 8027 2740 8025
      2729 8020
TIME...MOT...LOC 1824Z 248DEG 23KT 2738 8039

$$


15

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 11:17 PM EDT	Special Marine Warning	MLB		118 min
Apr 13, 11:27 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	23 min
Apr 14, 3:47 AM EDT	Wind Advisory	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	16 hr
Apr 14, 5:25 AM EDT	Severe Thunderstorm Warning	MLB	Lake	32 min
Apr 14, 9:17 AM EDT	Tornado Warning	MLB	Lake, Orange	43 min
Apr 14, 9:51 AM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Osceola, Seminole, Volusia	54 min
Apr 14, 10:15 AM EDT	Special Marine Warning	MLB		2 hr
Apr 14, 10:24 AM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange, Osceola, Seminole, Volusia	51 min
Apr 14, 10:29 AM EDT	Tornado Warning	MLB	Orange	31 min
Apr 14, 10:53 AM EDT	Tornado Warning	MLB	Brevard	37 min
Apr 14, 11:07 AM EDT	Tornado Warning	MLB	Brevard	24 min
Apr 14, 12:27 PM EDT	Special Marine Warning	MLB		63 min
Apr 14, 1:30 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee, Saint Lucie	45 min
Apr 14, 1:32 PM EDT	Tornado Warning	MLB	Okeechobee, Saint Lucie	43 min
Apr 14, 1:50 PM EDT	Special Marine Warning	MLB		43 min
Apr 14, 2:45 PM EDT	Fire Weather Watch	MLB	Lake, Orange, Osceola, Seminole, Volusia	13 hr

Nearby

Tornado Warnings in Florida, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.