Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 19, NWS Melbourne, FL

September 9, 2017Indian River County, Saint Lucie County, Florida

NWS Melbourne, FL issued this tornado warning at Sep 9, 2017, 7:24 PM EDT for Indian River County, Saint Lucie County, Florida. It was in force for 36 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 9, 2017, 7:24 PM EDT (23:24 UTC)
Expired: Sep 9, 2017, 8:00 PM EDT
In force: 36 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Indian River County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 79 km from the middle of the area, began a volume at 23:27 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.

What was reported inside it

Time	Report	Where	Remark
Sep 9, 7:45 PM EDT	FUNNEL CLOUD	3 Nnw Fort Pierce, FL	REPORT OF A FUNNEL CLOUD NORTH OF FORT PIERCE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 11.4 hours before the alert went out and 182 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: 1745 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 926 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

888 
WFUS52 KMLB 092324
TORMLB
FLC061-111-100000-
/O.NEW.KMLB.TO.W.0019.170909T2324Z-170910T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
724 PM EDT SAT SEP 9 2017

The National Weather Service in Melbourne has issued a

* Tornado Warning for...
  Northeastern St. Lucie County in east central Florida...
  Southeastern Indian River County in east central Florida...

* Until 800 PM EDT
    
* At 724 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Fort Pierce Inlet, moving southwest at 25 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...
  Fort Pierce Inlet and Fort Pierce North around 740 PM EDT. 
  Fort Pierce, White City and Fort Pierce South around 750 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Grovenor Estates.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 2733 8036 2759 8049 2764 8032 2741 8022
TIME...MOT...LOC 2324Z 061DEG 22KT 2749 8018 

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

$$

Bragaw

2 follow-up statements

128 
WWUS52 KMLB 092342
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
742 PM EDT SAT SEP 9 2017

FLC061-111-100000-
/O.CON.KMLB.TO.W.0019.000000T0000Z-170910T0000Z/
St. Lucie FL-Indian River FL-
742 PM EDT SAT SEP 9 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR
NORTHEASTERN ST. LUCIE AND SOUTHEASTERN INDIAN RIVER COUNTIES...
    
At 741 PM EDT, a severe thunderstorm capable of producing a tornado 
was located between Vero Beach and Fort Pierce, moving southwest at 
25 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...
  White City, Fort Pierce South and Indian River Estates around 750 
  PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Grovenor Estates.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 2733 8036 2759 8049 2764 8032 2741 8022
TIME...MOT...LOC 2341Z 061DEG 22KT 2744 8029 

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

$$

Bragaw

142 
WWUS52 KMLB 092356
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
756 PM EDT SAT SEP 9 2017

FLC061-111-100006-
/O.EXP.KMLB.TO.W.0019.000000T0000Z-170910T0000Z/
St. Lucie FL-Indian River FL-
756 PM EDT SAT SEP 9 2017

...THE TORNADO WARNING FOR NORTHEASTERN ST. LUCIE AND SOUTHEASTERN
INDIAN RIVER COUNTIES WILL EXPIRE AT 800 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.

LAT...LON 2733 8036 2759 8049 2764 8032 2741 8022
TIME...MOT...LOC 2356Z 061DEG 22KT 2740 8038 

$$

Bragaw

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 9:13 PM EDT	Special Marine Warning	MLB		92 min
Sep 8, 9:58 PM EDT	Special Marine Warning	MLB		62 min
Sep 8, 11:49 PM EDT	Flood Watch	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	68 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.