Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 10, NWS Melbourne, FL

March 23, 2017Okeechobee County, Saint Lucie County, Florida

NWS Melbourne, FL issued this tornado warning at Mar 23, 2017, 1:40 PM EDT for Okeechobee County, Saint Lucie County, Florida. It was in force for 35 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 23, 2017, 1:40 PM EDT (17:40 UTC)
Expired: Mar 23, 2017, 2:15 PM EDT
In force: 35 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Okeechobee County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 86 km from the middle of the area, began a volume at 17:42 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, 5.7 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: 1038 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 665 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -153 m²/s²
0-3 km storm-relative helicity: -30 m²/s²
Significant tornado parameter: -0.6
Supercell composite: -3.6

Open this sounding in Storm Lab

The text

As transmitted.

842 
WFUS52 KMLB 231740
TORMLB
FLC093-111-231815-
/O.NEW.KMLB.TO.W.0010.170323T1740Z-170323T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
140 PM EDT THU MAR 23 2017

The National Weather Service in Melbourne has issued a

* Tornado Warning for...
  Western St. Lucie County in east central Florida...
  Southeastern Okeechobee County in east central Florida...

* Until 215 PM EDT
    
* At 140 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles southwest of Pointe West, or 12 miles
  southwest of Vero Beach South, moving southwest at 35 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This tornadic thunderstorm will remain over mainly rural areas of
  western St. Lucie and southeastern Okeechobee Counties, including
  the following locations: Basswood Estates.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This Tornado Warning replaces the Severe Thunderstorm Warning issued
for the same area.

&&

LAT...LON 2725 8088 2756 8065 2756 8052 2752 8044
      2720 8058 2721 8068 2716 8068
TIME...MOT...LOC 1740Z 027DEG 29KT 2749 8058 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Johnson

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 22, 8:37 PM EDT	Special Weather Statement	MLB	Orange	23 min
Mar 23, 4:06 AM EDT	Special Marine Warning	MLB		84 min
Mar 23, 4:18 AM EDT	Lake Wind Advisory	MLB	Orange, Osceola, Seminole, Volusia	16 hr
Mar 23, 4:27 AM EDT	Rip Current Statement	MLB	Volusia	16 hr
Mar 23, 4:27 AM EDT	High Surf Advisory	MLB	Volusia	40 hr
Mar 23, 5:25 AM EDT	Special Weather Statement	MLB	Brevard	50 min
Mar 23, 5:28 AM EDT	Special Marine Warning	MLB		92 min
Mar 23, 6:36 AM EDT	Special Marine Warning	MLB		114 min
Mar 23, 7:08 AM EDT	Special Marine Warning	MLB		82 min
Mar 23, 7:32 AM EDT	Special Weather Statement	MLB	Brevard	43 min
Mar 23, 7:59 AM EDT	Severe Thunderstorm Warning	MLB	Brevard	46 min
Mar 23, 8:27 AM EDT	Special Marine Warning	MLB		93 min
Mar 23, 8:32 AM EDT	Special Marine Warning	MLB		88 min
Mar 23, 9:29 AM EDT	Special Weather Statement	MLB	Brevard	61 min
Mar 23, 9:40 AM EDT	Special Weather Statement	MLB	Martin	50 min
Mar 23, 9:43 AM EDT	Special Weather Statement	MLB	Martin	47 min
Mar 23, 12:16 PM EDT	Special Weather Statement	MLB	Okeechobee	44 min
Mar 23, 12:33 PM EDT	Special Marine Warning	MLB		57 min
Mar 23, 1:06 PM EDT	Special Weather Statement	MLB	Indian River	39 min
Mar 23, 1:16 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Saint Lucie	59 min

Nearby

Tornado Warnings in Florida, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.