Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 18, NWS Melbourne, FL

August 18, 2017Brevard County, Florida

NWS Melbourne, FL issued this tornado warning at Aug 18, 2017, 6:52 PM EDT for Brevard County, Florida. It was in force for 23 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: Aug 18, 2017, 6:52 PM EDT (22:52 UTC)
Expired: Aug 18, 2017, 7:15 PM EDT
In force: 23 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 22 km from the middle of the area, began a volume at 22:54 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, 10.9 hours before the alert went out and 30 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: 222 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1020 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -64 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

488 
WFUS52 KMLB 182252
TORMLB
FLC009-182315-
/O.NEW.KMLB.TO.W.0018.170818T2252Z-170818T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
652 PM EDT FRI AUG 18 2017

The National Weather Service in Melbourne has issued a

* Tornado Warning for...
  Central Brevard County in Florida...

* Until 715 PM EDT
    
* At 651 PM EDT, a thunderstorm capable of producing a tornado was 
  located over Rockledge, moving northeast at 20 mph. This storm may 
  produce a brief land spout or tornado as it moves toward the 
  Indian River.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

* This tornadic thunderstorm will remain over mainly rural areas of
  central Brevard County, including the following locations: Space
  Coast Stadium.

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 2825 8076 2834 8083 2838 8070 2827 8064
TIME...MOT...LOC 2251Z 243DEG 26KT 2833 8069 

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

$$

15

3 follow-up statements

931 
WWUS52 KMLB 182259
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
659 PM EDT FRI AUG 18 2017

FLC009-182315-
/O.CON.KMLB.TO.W.0018.000000T0000Z-170818T2315Z/
Brevard FL-
659 PM EDT FRI AUG 18 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR CENTRAL
BREVARD COUNTY...
    
At 655 PM EDT, a thunderstorm capable of producing a tornado was 
located near Rockledge, moving northeast at 15 to 20 mph. The 
National Weather Service in Melbourne has recieved an unconfirmed 
report of a brief funnel touchdown in the Rockledge area from a 
spotter. The storm spotter reported swirling above his location with 
debris, bark and palm leaves falling. The environment today supports 
the development of brief funnels along storms developing on 
thunderstorm out flow boundaries.  

HAZARD...TORNADO. 

SOURCE...Radar indicated rotation. 

IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

Locations impacted include...
Rockledge and Merritt Island,. 

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 2825 8076 2834 8083 2838 8070 2827 8064
TIME...MOT...LOC 2255Z 243DEG 26KT 2834 8066 

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

$$

15

106 
WWUS52 KMLB 182304
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
704 PM EDT FRI AUG 18 2017

FLC009-182315-
/O.CON.KMLB.TO.W.0018.000000T0000Z-170818T2315Z/
Brevard FL-
704 PM EDT FRI AUG 18 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR CENTRAL
BREVARD COUNTY...
    
At 701 PM EDT, a thunderstorm capable of producing a tornado was 
located over Rockledge, moving east at 10 to 15 mph. Brevard Fire 
and Rescue reported damage to two roofs from a brief touchdown of a 
funnel on Buckingham Court in the Rockledge area. 

HAZARD...TORNADO. 

SOURCE...Radar indicated rotation. 

IMPACT...Expect damage to mobile homes, roofs, and vehicles. 

Locations impacted include...
Rockledge and Merritt Island. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 2825 8076 2834 8083 2838 8070 2827 8064
TIME...MOT...LOC 2301Z 252DEG 9KT 2833 8067 

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

$$

15

878 
WWUS52 KMLB 182314
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
714 PM EDT FRI AUG 18 2017

FLC009-182322-
/O.EXP.KMLB.TO.W.0018.000000T0000Z-170818T2315Z/
Brevard FL-
714 PM EDT FRI AUG 18 2017

...THE TORNADO WARNING FOR CENTRAL BREVARD COUNTY WILL EXPIRE AT 715
PM EDT...
                
The storm which prompted the warning has weakened, and no longer 
appears capable of producing a funnel. Therefore the warning will be 
allowed to expire.  However gusty winds and heavy rain are still 
possible with this thunderstorm from Sharpes and Port Saint John to 
Kennedy Space Center through 745 pm.

LAT...LON 2825 8076 2834 8083 2838 8070 2827 8064
TIME...MOT...LOC 2312Z 243DEG 26KT 2836 8060 

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 5:01 PM EDT	Special Weather Statement	MLB	Osceola	89 min
Aug 18, 5:13 PM EDT	Special Weather Statement	MLB	Volusia	47 min
Aug 18, 5:53 PM EDT	Areal Flood Advisory	MLB	Volusia	52 min
Aug 18, 6:54 PM EDT	Special Marine Warning	MLB		66 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.