Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 70, NWS Melbourne, FL

September 29, 2017Brevard County, Florida

NWS Melbourne, FL issued this tornado warning at Sep 29, 2017, 8:38 PM EDT for Brevard County, Florida. It was in force for 22 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 29, 2017, 8:38 PM EDT (00:38 UTC)
Expired: Sep 29, 2017, 9:00 PM EDT
In force: 22 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 22 km from the middle of the area, began a volume at 00:42 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 00:00Z, 0.6 hours before the alert went out and 62 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1170 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: -23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

909 
WFUS52 KMLB 300038
TORMLB
FLC009-300100-
/O.NEW.KMLB.TO.W.0070.170930T0038Z-170930T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
838 PM EDT FRI SEP 29 2017

The National Weather Service in Melbourne has issued a

* Tornado Warning for...
  South central Brevard County in Florida...

* Until 900 PM EDT
    
* At 836 PM EDT, a severe thunderstorm capable of producing a 
  tornado was located near Micco, moving northwest at 15 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 tornadic thunderstorm will remain over mainly rural areas of 
  south central Brevard County but approach south Palm Bay and 
  Malabar.

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 2785 8051 2784 8055 2802 8074 2804 8063
TIME...MOT...LOC 0036Z 145DEG 14KT 2787 8055 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

15

1 follow-up statement

372 
WWUS52 KMLB 300059
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
859 PM EDT FRI SEP 29 2017

FLC009-300108-
/O.EXP.KMLB.TO.W.0070.000000T0000Z-170930T0100Z/
Brevard FL-
859 PM EDT FRI SEP 29 2017

...THE TORNADO WARNING FOR SOUTH CENTRAL BREVARD COUNTY WILL EXPIRE
AT 900 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.  However heavy rain
is still possible with this thunderstorm.

LAT...LON 2785 8051 2784 8055 2802 8074 2804 8063
TIME...MOT...LOC 0058Z 145DEG 14KT 2794 8060 

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 29, 8:00 PM EDT	Areal Flood Warning	MLB	Indian River	60 min
Sep 29, 8:37 PM EDT	Areal Flood Advisory	MLB	Brevard	83 min
Sep 29, 9:53 PM EDT	Areal Flood Warning	MLB	Brevard	112 min
Sep 30, 4:05 AM EDT	Rip Current Statement	MLB	Volusia	16 hr
Sep 30, 7:29 PM EDT	Areal Flood Advisory	MLB	Orange, Osceola	61 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.