Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 31, NWS Melbourne, FL

September 10, 2017Saint Lucie County, Florida

NWS Melbourne, FL issued this tornado warning at Sep 10, 2017, 11:48 AM EDT for Saint Lucie County, Florida. It was in force for 27 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: Sep 10, 2017, 11:48 AM EDT (15:48 UTC)
Expired: Sep 10, 2017, 12:15 PM EDT
In force: 27 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 99 km from the middle of the area, began a volume at 15:49 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 watch it was issued in

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

Issued	Product	Office	Lasted
Sep 9, 11:45 PM EDT	Tornado Watch	SPC	12 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 3.8 hours before the alert went out and 214 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: 103 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

389 
WFUS52 KMLB 101548
TORMLB
FLC111-101615-
/O.NEW.KMLB.TO.W.0031.170910T1548Z-170910T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
1148 AM EDT SUN SEP 10 2017

The National Weather Service in Melbourne has issued a

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

* Until 1215 PM EDT
    
* At 1147 AM EDT, a severe thunderstorm capable of producing a
  tornado was located over Nettles Island, or over Walton, moving
  northwest at 55 mph.

  HAZARD...Tornado. 

  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 dangerous storm will be near...
  Saint Lucie Nuclear Power Plant around 1150 AM EDT. 
  White City and Fort Pierce South around 1200 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Waveland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 2719 8016 2720 8019 2721 8019 2722 8021
      2721 8021 2722 8023 2723 8021 2726 8023
      2726 8028 2723 8028 2737 8068 2756 8068
      2756 8051 2740 8022 2725 8015
TIME...MOT...LOC 1547Z 127DEG 58KT 2729 8021 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Kelly

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 9:34 PM EDT	Tornado Warning	MLB	Saint Lucie	26 min
Sep 9, 9:59 PM EDT	Tornado Warning	MLB	Saint Lucie	16 min
Sep 10, 1:54 AM EDT	Areal Flood Warning	MLB	Saint Lucie	111 min
Sep 10, 3:24 AM EDT	Flash Flood Warning	MLB	Saint Lucie	111 min
Sep 10, 3:49 AM EDT	Tornado Warning	MLB	Indian River, Saint Lucie	16 min
Sep 10, 5:14 AM EDT	Areal Flood Warning	MLB	Indian River, Saint Lucie	3 hr
Sep 10, 5:14 AM EDT	Tornado Warning	MLB	Brevard	31 min
Sep 10, 5:53 AM EDT	Tornado Warning	MLB	Brevard	22 min
Sep 10, 8:05 AM EDT	Areal Flood Warning	MLB	Saint Lucie	3 hr
Sep 10, 8:18 AM EDT	Special Marine Warning	MLB		42 min
Sep 10, 8:35 AM EDT	Special Marine Warning	MLB		55 min
Sep 10, 9:19 AM EDT	Tornado Warning	MLB	Brevard	26 min
Sep 10, 9:42 AM EDT	Areal Flood Warning	MLB	Indian River	3 hr
Sep 10, 10:28 AM EDT	Tornado Warning	MLB	Osceola	32 min
Sep 10, 11:01 AM EDT	Tornado Warning	MLB	Brevard	29 min
Sep 10, 11:12 AM EDT	Tornado Warning	MLB	Brevard	48 min
Sep 10, 11:21 AM EDT	Tornado Warning	MLB	Saint Lucie	24 min
Sep 10, 11:40 AM EDT	Tornado Warning	MLB	Okeechobee	35 min
Sep 10, 11:58 AM EDT	Tornado Warning	MLB	Brevard, Indian River	30 min
Sep 10, 12:09 PM EDT	Areal Flood Warning	MLB	Brevard, Indian River, Okeechobee, Osceola, Saint Lucie	3 hr
Sep 10, 12:13 PM EDT	Tornado Warning	MLB	Osceola	32 min
Sep 10, 12:41 PM EDT	Tornado Warning	MLB	Martin, Saint Lucie	34 min
Sep 10, 1:27 PM EDT	Tornado Warning	MLB	Brevard, Indian River	33 min
Sep 10, 1:42 PM EDT	Tornado Warning	MLB	Martin, Saint Lucie	33 min
Sep 10, 1:53 PM EDT	Tornado Warning	MLB	Brevard, Indian River	20 min
Sep 10, 2:37 PM EDT	Tornado Warning	MLB	Brevard	38 min
Sep 10, 2:39 PM EDT	Tornado Warning	MLB	Saint Lucie	51 min
Sep 10, 3:12 PM EDT	Tornado Warning	MLB	Indian River, Saint Lucie	33 min
Sep 10, 3:15 PM EDT	Tornado Warning	MLB	Brevard	30 min
Sep 10, 3:16 PM EDT	River Flood Warning	MLB	Osceola	12 days
Sep 10, 3:22 PM EDT	Tornado Warning	MLB	Martin, Saint Lucie	23 min
Sep 10, 3:56 PM EDT	Areal Flood Warning	MLB	Brevard, Indian River, Saint Lucie	109 min
Sep 10, 4:09 PM EDT	Tornado Warning	MLB	Brevard	66 min
Sep 10, 4:14 PM EDT	Tornado Warning	MLB	Indian River	31 min
Sep 10, 4:28 PM EDT	Tornado Warning	MLB	Martin, Saint Lucie	47 min
Sep 10, 4:31 PM EDT	River Flood Warning	MLB	Seminole	38 hr
Sep 10, 4:38 PM EDT	Tornado Warning	MLB	Brevard, Indian River	22 min
Sep 10, 4:42 PM EDT	Tornado Warning	MLB	Brevard, Seminole	33 min
Sep 10, 4:44 PM EDT	Tornado Warning	MLB	Brevard, Seminole, Volusia	16 min
Sep 10, 4:59 PM EDT	Tornado Warning	MLB	Brevard, Indian River	31 min
Sep 10, 5:10 PM EDT	Tornado Warning	MLB	Osceola	35 min
Sep 10, 5:12 PM EDT	Tornado Warning	MLB	Brevard, Seminole, Volusia	63 min
Sep 10, 5:31 PM EDT	Tornado Warning	MLB	Indian River, Saint Lucie	29 min
Sep 10, 5:43 PM EDT	Tornado Warning	MLB	Seminole, Volusia	32 min
Sep 10, 5:45 PM EDT	Tornado Warning	MLB	Volusia	30 min
Sep 10, 5:52 PM EDT	Tornado Warning	MLB	Brevard	53 min
Sep 10, 5:58 PM EDT	Areal Flood Warning	MLB	Brevard, Indian River, Lake, Martin, Okeechobee, Orange and 4 more	12 hr
Sep 10, 6:15 PM EDT	Tornado Warning	MLB	Lake, Seminole, Volusia	30 min
Sep 10, 6:34 PM EDT	Tornado Warning	MLB	Orange, Seminole	26 min
Sep 10, 6:39 PM EDT	Tornado Warning	MLB	Orange	36 min
Sep 10, 6:58 PM EDT	Tornado Warning	MLB	Brevard, Volusia	32 min
Sep 10, 7:25 PM EDT	Tornado Warning	MLB	Lake	35 min
Sep 10, 7:48 PM EDT	Flash Flood Warning	MLB	Brevard, Indian River, Osceola	2 hr

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.