Alert archive / Florida / Tornado Warnings in 2018

Tornado Warning 16, NWS Melbourne, FL

December 20, 2018Brevard County, Seminole County, Volusia County, Florida

NWS Melbourne, FL issued this tornado warning at Dec 20, 2018, 12:02 PM EST for Brevard County, Seminole County, Volusia County, Florida. It was in force for 28 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: Dec 20, 2018, 12:02 PM EST (17:02 UTC)
Expired: Dec 20, 2018, 12:30 PM EST
In force: 28 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Brevard County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 75 km from the middle of the area, began a volume at 17:01 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
Dec 20, 7:55 AM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 5.0 hours before the alert went out and 52 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: 326 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

829 
WFUS52 KMLB 201702
TORMLB
FLC009-117-127-201730-
/O.NEW.KMLB.TO.W.0016.181220T1702Z-181220T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
1202 PM EST THU DEC 20 2018

The National Weather Service in Melbourne has issued a

* Tornado Warning for...
  Southeastern Seminole County in east central Florida...
  Northwestern Brevard County in Florida...
  Southeastern Volusia County in east central Florida...

* Until 1230 PM EST.
    
* At 1202 PM EST, a severe thunderstorm capable of producing a
  tornado was located 7 miles east of Chuluota, moving northeast at
  45 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...
  Scottsmoor and Maytown around 1220 PM EST.

Other locations impacted by this tornadic thunderstorm include
Shiloh.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2882 8076 2861 8099 2861 8103 2863 8109
      2893 8097
TIME...MOT...LOC 1702Z 208DEG 27KT 2866 8100 

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

$$

Rodriguez

3 follow-up statements

276 
WWUS52 KMLB 201708
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1208 PM EST THU DEC 20 2018

FLC117-201717-
/O.CAN.KMLB.TO.W.0016.000000T0000Z-181220T1730Z/
Seminole FL-
1208 PM EST THU DEC 20 2018

...THE TORNADO WARNING FOR SOUTHEASTERN SEMINOLE COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of Seminole County. Therefore, the warning has been cancelled for 
Seminole County.

A Tornado Watch remains in effect until 400 PM EST for east central
Florida.

LAT...LON 2882 8076 2863 8097 2874 8105 2893 8097
TIME...MOT...LOC 1707Z 208DEG 27KT 2869 8098 

$$

FLC009-127-201730-
/O.CON.KMLB.TO.W.0016.000000T0000Z-181220T1730Z/
Brevard FL-Volusia FL-
1208 PM EST THU DEC 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 PM EST FOR
NORTHWESTERN BREVARD AND SOUTHEASTERN VOLUSIA COUNTIES...
    
At 1207 PM EST, a severe thunderstorm capable of producing a tornado
was located 8 miles west of Mims, moving northeast at 45 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...
  Scottsmoor and Maytown around 1220 PM EST.

Other locations impacted by this tornadic thunderstorm include
Shiloh.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2882 8076 2863 8097 2874 8105 2893 8097
TIME...MOT...LOC 1707Z 208DEG 27KT 2869 8098 

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

$$

Rodriguez

674 
WWUS52 KMLB 201712
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1212 PM EST THU DEC 20 2018

FLC009-127-201730-
/O.CON.KMLB.TO.W.0016.000000T0000Z-181220T1730Z/
Brevard FL-Volusia FL-
1212 PM EST THU DEC 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 PM EST FOR
NORTHWESTERN BREVARD AND SOUTHEASTERN VOLUSIA COUNTIES...
    
At 1211 PM EST, a severe thunderstorm capable of producing a tornado 
was located over Scottsmoor, moving northeast at 50 mph. This storm 
is about to cross Interstate 95 and U.S. Highway 1 just north of 
Scottsmoor.  

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
northwestern Brevard and southeastern Volusia Counties, including the
following locations... Shiloh.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2882 8076 2864 8096 2864 8097 2879 8098
      2892 8095
TIME...MOT...LOC 1711Z 217DEG 55KT 2877 8090 

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

$$

Rodriguez

948 
WWUS52 KMLB 201723
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1223 PM EST THU DEC 20 2018

FLC009-127-201730-
/O.CON.KMLB.TO.W.0016.000000T0000Z-181220T1730Z/
Brevard FL-Volusia FL-
1223 PM EST THU DEC 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 PM EST FOR NORTHERN
BREVARD AND SOUTHEASTERN VOLUSIA COUNTIES...
    
At 1222 PM EST, a severe thunderstorm capable of producing a tornado 
was located just east of Oak Hill, moving northeast at 45 mph. This 
is about to move over the intracoastal waterway and the barrier 
island south of Apollo Beach.

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...
Oak Hill.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2882 8076 2879 8079 2880 8091 2889 8090
TIME...MOT...LOC 1722Z 208DEG 27KT 2884 8086 

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

$$

Rodriguez

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 3:46 AM EST	Gale Warning	MLB		48 hr
Dec 20, 4:12 AM EST	Beach Hazards Statement	MLB	Volusia	14 hr
Dec 20, 4:15 AM EST	Lake Wind Advisory	MLB	Okeechobee, Orange, Osceola, Seminole, Volusia	14 hr
Dec 20, 8:17 AM EST	Special Weather Statement	MLB	Lake	58 min
Dec 20, 8:23 AM EST	Tornado Warning	MLB	Lake, Orange	22 min
Dec 20, 9:14 AM EST	Special Weather Statement	MLB	Orange, Seminole, Volusia	61 min
Dec 20, 9:25 AM EST	Tornado Warning	MLB	Orange	35 min
Dec 20, 9:37 AM EST	Special Marine Warning	MLB		3 hr
Dec 20, 10:00 AM EST	Areal Flood Advisory	MLB	Lake, Orange, Osceola, Seminole, Volusia	2 hr
Dec 20, 10:18 AM EST	Special Weather Statement	MLB	Orange, Seminole, Volusia	57 min
Dec 20, 10:46 AM EST	Tornado Warning	MLB	Seminole, Volusia	29 min
Dec 20, 11:01 AM EST	Tornado Warning	MLB	Volusia	29 min
Dec 20, 11:24 AM EST	Tornado Warning	MLB	Volusia	19 min
Dec 20, 11:35 AM EST	Severe Thunderstorm Warning	MLB	Brevard, Orange, Osceola, Seminole, Volusia	55 min
Dec 20, 12:21 PM EST	Areal Flood Advisory	MLB	Brevard, Lake, Orange, Osceola, Seminole, Volusia	3 hr
Dec 20, 12:25 PM EST	Special Marine Warning	MLB		110 min
Dec 20, 12:33 PM EST	Severe Thunderstorm Warning	MLB	Brevard, Seminole, Volusia	27 min
Dec 20, 12:57 PM EST	Severe Thunderstorm Warning	MLB	Brevard, Orange, Osceola	63 min
Dec 20, 1:42 PM EST	Special Weather Statement	MLB	Okeechobee	48 min
Dec 20, 2:02 PM EST	Special Marine Warning	MLB		3 hr
Dec 20, 2:05 PM EST	Special Weather Statement	MLB	Brevard	25 min
Dec 20, 2:19 PM EST	Special Marine Warning	MLB		3 hr
Dec 20, 2:25 PM EST	Severe Thunderstorm Warning	MLB	Brevard	27 min
Dec 20, 2:59 PM EST	Special Weather Statement	MLB	Indian River, Martin, Saint Lucie	61 min

Nearby

Tornado Warnings in Florida, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.