Alert archive / Florida / Tornado Warnings in 2018

Tornado Warning 1, NWS Melbourne, FL

March 20, 2018Volusia County, Florida

NWS Melbourne, FL issued this tornado warning at Mar 20, 2018, 9:39 AM EDT for Volusia 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
Mar 20, 2018, 9:39 AM EDT (13:39 UTC)
Expired
Mar 20, 2018, 10:30 AM EDT
In force
51 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 121 km from the middle of the area, began a volume at 13:40 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, 1.7 hours before the alert went out and 94 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, Cape Canaveral, FL at 12:00Z on 2018-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 860 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2018-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 155 square meters per square second.19395878Sfc1 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
860 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
864 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
155 m²/s²
0-3 km storm-relative helicity
213 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

999 
WFUS52 KMLB 201339
TORMLB
FLC127-201430-
/O.NEW.KMLB.TO.W.0001.180320T1339Z-180320T1430Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
939 AM EDT TUE MAR 20 2018

The National Weather Service in Melbourne has issued a

* Tornado Warning for...
  Central Volusia County in east central Florida...

* Until 1030 AM EDT
    
* At 939 AM EDT, a severe thunderstorm capable of producing a tornado
  was located over DeLeon Springs, moving east at 35 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...
  Daytona Beach, Port Orange, DeLand, South Daytona and Holly 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.

&&

LAT...LON 2909 8089 2905 8136 2914 8139 2927 8099
TIME...MOT...LOC 1339Z 259DEG 32KT 2911 8131 

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

$$

15
3 follow-up statements
872 
WWUS52 KMLB 201401
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1001 AM EDT TUE MAR 20 2018

FLC127-201430-
/O.CON.KMLB.TO.W.0001.000000T0000Z-180320T1430Z/
Volusia FL-
1001 AM EDT TUE MAR 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT FOR EAST
CENTRAL VOLUSIA COUNTY...
    
At 958 AM EDT, a severe thunderstorm capable of producing a tornado 
was located near 5 miles southwest of Daytona International 
Speedway, moving east 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 Orange, South Daytona, Daytona Beach Shores, Wilbur By The Sea.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 2909 8089 2907 8116 2915 8119 2922 8096
TIME...MOT...LOC 1358Z 261DEG 33KT 2913 8113 

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

$$

15
191 
WWUS52 KMLB 201417
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1017 AM EDT TUE MAR 20 2018

FLC127-201430-
/O.CON.KMLB.TO.W.0001.000000T0000Z-180320T1430Z/
Volusia FL-
1017 AM EDT TUE MAR 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT FOR
NORTHEASTERN VOLUSIA COUNTY...
    
At 1016 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Port Orange, moving east at 35 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 Orange, Daytona Beach Shores, and Wilbur By The Sea.

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 2916 8093 2912 8091 2912 8102 2915 8103
      2921 8096
TIME...MOT...LOC 1416Z 258DEG 26KT 2916 8098 

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

$$

15
314 
WWUS52 KMLB 201422
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1022 AM EDT TUE MAR 20 2018

FLC127-201430-
/O.EXP.KMLB.TO.W.0001.000000T0000Z-180320T1430Z/
Volusia FL-
1022 AM EDT TUE MAR 20 2018

...THE TORNADO WARNING FOR NORTHEASTERN VOLUSIA COUNTY WILL EXPIRE AT
1030 AM 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 gusty 
winds and heavy rain are still possible with this thunderstorm as it 
moves quickly eastward across the near shore Volusia county Atlantic 
waters.

LAT...LON 2916 8093 2912 8091 2912 8102 2915 8103
      2921 8096
TIME...MOT...LOC 1420Z 259DEG 32KT 2917 8094 

$$

15

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 20, 3:13 AM EDTLake Wind AdvisoryMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia17 hr
Mar 20, 3:17 AM EDTGale WarningMLB31 hr
Mar 20, 9:19 AM EDTSpecial Weather StatementMLBVolusia56 min
Mar 20, 9:30 AM EDTSevere Thunderstorm WarningMLBVolusia45 min
Mar 20, 10:31 AM EDTSevere Thunderstorm WarningMLBVolusia29 min
Mar 20, 10:33 AM EDTSpecial Marine WarningMLB42 min
Mar 20, 1:39 PM EDTSevere Thunderstorm WarningMLBLake36 min
Mar 20, 1:57 PM EDTTornado WarningMLBLake, Orange33 min
Mar 20, 2:17 PM EDTSpecial Weather StatementMLBLake, Orange, Seminole, Volusia58 min
Mar 20, 2:24 PM EDTSevere Thunderstorm WarningMLBLake36 min
Mar 20, 2:26 PM EDTTornado WarningMLBOrange, Seminole34 min
Mar 20, 2:32 PM EDTTornado WarningMLBLake18 min
Mar 20, 2:48 PM EDTSevere Thunderstorm WarningMLBOrange, Seminole27 min
Mar 20, 3:03 PM EDTSevere Thunderstorm WarningMLBOrange27 min
Mar 20, 3:09 PM EDTSpecial Marine WarningMLB111 min
Mar 20, 3:18 PM EDTSevere Thunderstorm WarningMLBOrange27 min
Mar 20, 3:20 PM EDTSpecial Weather StatementMLBLake, Orange, Seminole, Volusia55 min
Mar 20, 3:42 PM EDTSevere Thunderstorm WarningMLBBrevard48 min
Mar 20, 4:14 PM EDTSpecial Weather StatementMLBVolusia61 min
Mar 20, 4:50 PM EDTSpecial Weather StatementMLBLake, Orange55 min
Mar 20, 5:05 PM EDTSpecial Weather StatementMLBIndian River, Okeechobee, Osceola, Saint Lucie85 min
Mar 20, 5:20 PM EDTSpecial Marine WarningMLB115 min
Mar 20, 5:25 PM EDTTornado WarningMLBOkeechobee35 min
Mar 20, 5:26 PM EDTSpecial Weather StatementMLBVolusia49 min
Mar 20, 5:32 PM EDTSevere Thunderstorm WarningMLBVolusia28 min
Mar 20, 5:38 PM EDTSpecial Marine WarningMLB2 hr
Mar 20, 5:56 PM EDTSevere Thunderstorm WarningMLBIndian River, Okeechobee, Saint Lucie34 min
Mar 20, 6:00 PM EDTSpecial Weather StatementMLBOrange, Seminole60 min
Mar 20, 6:35 PM EDTSpecial Weather StatementMLBSaint Lucie25 min
Mar 20, 7:25 PM EDTSpecial Weather StatementMLBSaint Lucie20 min
Mar 20, 7:50 PM EDTSpecial Weather StatementMLBMartin25 min

Nearby

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