Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 39, NWS Melbourne, FL

September 10, 2017Saint Lucie County, Florida

NWS Melbourne, FL issued this tornado warning at Sep 10, 2017, 2:39 PM EDT for Saint Lucie County, Florida. It was in force for 51 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, 2:39 PM EDT (18:39 UTC)
Expired
Sep 10, 2017, 3:30 PM EDT
In force
51 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 18:42 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 watch it was issued in

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

IssuedProductOfficeLasted
Sep 10, 12:02 PM EDTTornado WatchSPC13 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 6.7 hours before the alert went out and 213 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-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2017-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 103 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2017-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

176 
WFUS52 KMLB 101839
TORMLB
FLC111-101930-
/O.NEW.KMLB.TO.W.0039.170910T1839Z-170910T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
239 PM 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 330 PM EDT
    
* At 238 PM EDT, a severe thunderstorm capable of producing a 
  tornado was located near Nettles Island, moving northwest at 40 
  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. 

* Locations impacted include...
  Port Saint Lucie, Walton, Fort Pierce, Stuart and Saint Lucie
  Nuclear Power Plant.

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 2718 8017 2718 8018 2721 8021 2719 8020
      2721 8026 2722 8021 2726 8023 2726 8028
      2722 8028 2737 8068 2756 8068 2756 8046
      2743 8023 2722 8014
TIME...MOT...LOC 1838Z 120DEG 33KT 2731 8021 

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

$$

15

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 9:34 PM EDTTornado WarningMLBSaint Lucie26 min
Sep 9, 9:59 PM EDTTornado WarningMLBSaint Lucie16 min
Sep 10, 1:54 AM EDTAreal Flood WarningMLBSaint Lucie111 min
Sep 10, 3:24 AM EDTFlash Flood WarningMLBSaint Lucie111 min
Sep 10, 3:49 AM EDTTornado WarningMLBIndian River, Saint Lucie16 min
Sep 10, 5:14 AM EDTAreal Flood WarningMLBIndian River, Saint Lucie3 hr
Sep 10, 5:14 AM EDTTornado WarningMLBBrevard31 min
Sep 10, 5:53 AM EDTTornado WarningMLBBrevard22 min
Sep 10, 8:05 AM EDTAreal Flood WarningMLBSaint Lucie3 hr
Sep 10, 8:18 AM EDTSpecial Marine WarningMLB42 min
Sep 10, 8:35 AM EDTSpecial Marine WarningMLB55 min
Sep 10, 9:19 AM EDTTornado WarningMLBBrevard26 min
Sep 10, 9:42 AM EDTAreal Flood WarningMLBIndian River3 hr
Sep 10, 10:28 AM EDTTornado WarningMLBOsceola32 min
Sep 10, 11:01 AM EDTTornado WarningMLBBrevard29 min
Sep 10, 11:12 AM EDTTornado WarningMLBBrevard48 min
Sep 10, 11:21 AM EDTTornado WarningMLBSaint Lucie24 min
Sep 10, 11:40 AM EDTTornado WarningMLBOkeechobee35 min
Sep 10, 11:48 AM EDTTornado WarningMLBSaint Lucie27 min
Sep 10, 11:58 AM EDTTornado WarningMLBBrevard, Indian River30 min
Sep 10, 12:09 PM EDTAreal Flood WarningMLBBrevard, Indian River, Okeechobee, Osceola, Saint Lucie3 hr
Sep 10, 12:13 PM EDTTornado WarningMLBOsceola32 min
Sep 10, 12:41 PM EDTTornado WarningMLBMartin, Saint Lucie34 min
Sep 10, 1:27 PM EDTTornado WarningMLBBrevard, Indian River33 min
Sep 10, 1:42 PM EDTTornado WarningMLBMartin, Saint Lucie33 min
Sep 10, 1:53 PM EDTTornado WarningMLBBrevard, Indian River20 min
Sep 10, 2:37 PM EDTTornado WarningMLBBrevard38 min
Sep 10, 3:12 PM EDTTornado WarningMLBIndian River, Saint Lucie33 min
Sep 10, 3:15 PM EDTTornado WarningMLBBrevard30 min
Sep 10, 3:16 PM EDTRiver Flood WarningMLBOsceola12 days
Sep 10, 3:22 PM EDTTornado WarningMLBMartin, Saint Lucie23 min
Sep 10, 3:56 PM EDTAreal Flood WarningMLBBrevard, Indian River, Saint Lucie109 min
Sep 10, 4:09 PM EDTTornado WarningMLBBrevard66 min
Sep 10, 4:14 PM EDTTornado WarningMLBIndian River31 min
Sep 10, 4:28 PM EDTTornado WarningMLBMartin, Saint Lucie47 min
Sep 10, 4:31 PM EDTRiver Flood WarningMLBSeminole38 hr
Sep 10, 4:38 PM EDTTornado WarningMLBBrevard, Indian River22 min
Sep 10, 4:42 PM EDTTornado WarningMLBBrevard, Seminole33 min
Sep 10, 4:44 PM EDTTornado WarningMLBBrevard, Seminole, Volusia16 min
Sep 10, 4:59 PM EDTTornado WarningMLBBrevard, Indian River31 min
Sep 10, 5:10 PM EDTTornado WarningMLBOsceola35 min
Sep 10, 5:12 PM EDTTornado WarningMLBBrevard, Seminole, Volusia63 min
Sep 10, 5:31 PM EDTTornado WarningMLBIndian River, Saint Lucie29 min
Sep 10, 5:43 PM EDTTornado WarningMLBSeminole, Volusia32 min
Sep 10, 5:45 PM EDTTornado WarningMLBVolusia30 min
Sep 10, 5:52 PM EDTTornado WarningMLBBrevard53 min
Sep 10, 5:58 PM EDTAreal Flood WarningMLBBrevard, Indian River, Lake, Martin, Okeechobee, Orange and 4 more12 hr
Sep 10, 6:15 PM EDTTornado WarningMLBLake, Seminole, Volusia30 min
Sep 10, 6:34 PM EDTTornado WarningMLBOrange, Seminole26 min
Sep 10, 6:39 PM EDTTornado WarningMLBOrange36 min
Sep 10, 6:58 PM EDTTornado WarningMLBBrevard, Volusia32 min
Sep 10, 7:25 PM EDTTornado WarningMLBLake35 min
Sep 10, 7:48 PM EDTFlash Flood WarningMLBBrevard, Indian River, Osceola2 hr

Nearby

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