Alert archive / Florida / Tornado Warnings in 2018

Tornado Warning 6, NWS Melbourne, FL

April 15, 2018Indian River County, Florida

NWS Melbourne, FL issued this tornado warning at Apr 15, 2018, 4:57 PM EDT for Indian River County, Florida. It was in force for 18 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
Apr 15, 2018, 4:57 PM EDT (20:57 UTC)
Expired
Apr 15, 2018, 5:15 PM EDT
In force
18 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Indian River County, FL

The radar

The Melbourne radar (KMLB), 62 km from the middle of the area, began a volume at 21:01 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.

What was reported inside it

TimeReportWhereRemark
Apr 15, 5:08 PM EDTTSTM WND GST 51Vero Beach Airport, FLASOS MEASURED WIND GUST OF 44KT/51MPH

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

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.0 hours before the alert went out and 97 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 2018-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1019 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2018-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 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
1019 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
703 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3

Open this sounding in Storm Lab

The text

As transmitted.

633 
WFUS52 KMLB 152057
TORMLB
FLC061-152130-
/O.NEW.KMLB.TO.W.0006.180415T2057Z-180415T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
457 PM EDT SUN APR 15 2018

The National Weather Service in Melbourne has issued a

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

* Until 530 PM EDT
    
* At 457 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Vero Beach South, moving northeast at 30 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...
  Vero Beach, Indian River Shores, Vero Beach South, Gifford and Vero
  Beach Highland.

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 2756 8043 2756 8045 2760 8048 2771 8035
      2763 8032 2761 8031
TIME...MOT...LOC 2057Z 228DEG 24KT 2761 8041 

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

$$

15
1 follow-up statement
634 
WWUS52 KMLB 152115
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
515 PM EDT SUN APR 15 2018

FLC061-152123-
/O.CAN.KMLB.TO.W.0006.000000T0000Z-180415T2130Z/
Indian River FL-
515 PM EDT SUN APR 15 2018

...THE TORNADO WARNING FOR SOUTHEASTERN INDIAN RIVER COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved over the near shore 
Atlantic waters. Therefore the warning has been cancelled.  However 
gusty winds and heavy rain are still possible on the back side of 
this thunderstorm along the coast through 530 pm.

LAT...LON 2756 8043 2756 8045 2760 8048 2771 8035
      2763 8032 2761 8031
TIME...MOT...LOC 2111Z 228DEG 24KT 2768 8032 

$$

15

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 4:22 AM EDTLake Wind AdvisoryMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia16 hr
Apr 15, 2:05 PM EDTSpecial Weather StatementMLBOkeechobee40 min
Apr 15, 2:10 PM EDTSpecial Weather StatementMLBLake35 min
Apr 15, 2:28 PM EDTSpecial Weather StatementMLBLake47 min
Apr 15, 2:45 PM EDTSpecial Weather StatementMLBOrange30 min
Apr 15, 2:59 PM EDTSpecial Weather StatementMLBOkeechobee46 min
Apr 15, 3:08 PM EDTSevere Thunderstorm WarningMLBLake, Orange37 min
Apr 15, 3:14 PM EDTSpecial Weather StatementMLBVolusia46 min
Apr 15, 3:18 PM EDTSevere Thunderstorm WarningMLBOrange, Seminole27 min
Apr 15, 3:20 PM EDTSevere Thunderstorm WarningMLBLake, Volusia55 min
Apr 15, 3:21 PM EDTSpecial Weather StatementMLBBrevard39 min
Apr 15, 3:24 PM EDTSpecial Marine WarningMLB2 hr
Apr 15, 3:40 PM EDTSpecial Marine WarningMLB2 hr
Apr 15, 3:41 PM EDTSevere Thunderstorm WarningMLBSeminole, Volusia49 min
Apr 15, 3:44 PM EDTSpecial Weather StatementMLBIndian River46 min
Apr 15, 4:02 PM EDTSpecial Weather StatementMLBBrevard28 min
Apr 15, 4:22 PM EDTSpecial Weather StatementMLBSeminole38 min
Apr 15, 4:25 PM EDTSpecial Weather StatementMLBLake50 min
Apr 15, 4:26 PM EDTSpecial Weather StatementMLBIndian River34 min
Apr 15, 4:39 PM EDTSpecial Weather StatementMLBBrevard21 min
Apr 15, 4:48 PM EDTSpecial Marine WarningMLB117 min
Apr 15, 5:03 PM EDTSpecial Marine WarningMLB117 min
Apr 15, 5:27 PM EDTSpecial Weather StatementMLBIndian River33 min
Apr 15, 5:57 PM EDTSpecial Marine WarningMLB53 min
Apr 15, 7:04 PM EDTSpecial Marine WarningMLB3 hr
Apr 15, 7:08 PM EDTSpecial Weather StatementMLBIndian River, Martin, Okeechobee, Saint Lucie67 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.