Alert archive / Florida / Tornado Warnings in 2020

Tornado Warning 27, NWS Melbourne, FL

August 18, 2020Volusia County, Florida

NWS Melbourne, FL issued this tornado warning at Aug 18, 2020, 3:52 PM EDT for Volusia County, Florida. It was in force for 23 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
Aug 18, 2020, 3:52 PM EDT (19:52 UTC)
Expired
Aug 18, 2020, 4:15 PM EDT
In force
23 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 121 km from the middle of the area, began a volume at 19:56 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
Aug 18, 3:52 PM EDTTSTM WND DMGDeland, FLNUMEROUS PICTURES AND REPORTS OF STRUCTURAL DAMAGE ALONG WITH LARGE TREES SNAPPED IN NORTH DELAND. POSSIBLE TORNADO. TIME ESTIMATED FROM RADAR.

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, 7.9 hours before the alert went out and 98 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 2020-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 475 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 2020-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939Sfc1 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
475 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
1373 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

882 
WFUS52 KMLB 181952
TORMLB
FLC127-182015-
/O.NEW.KMLB.TO.W.0027.200818T1952Z-200818T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
352 PM EDT Tue Aug 18 2020

The National Weather Service in Melbourne has issued a

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

* Until 415 PM EDT.
    
* At 352 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over DeLand, moving east at 20 mph.

  HAZARD...Tornado and quarter size hail.

  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...
  DeLand, Lake Helen, DeLand Airport, West DeLand and Glenwood. 

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 2916 8116 2898 8110 2899 8134 2902 8136
      2908 8137
TIME...MOT...LOC 1952Z 251DEG 16KT 2904 8132 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Combs
2 follow-up statements
576 
WWUS52 KMLB 182009
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
409 PM EDT Tue Aug 18 2020

FLC127-182015-
/O.CON.KMLB.TO.W.0027.000000T0000Z-200818T2015Z/
Volusia FL-
409 PM EDT Tue Aug 18 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR CENTRAL
VOLUSIA COUNTY...
    
At 408 PM EDT, a severe thunderstorm capable of producing a tornado
was located east of DeLand Airport, or near DeLand, moving northeast 
at 20 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...
DeLand, DeLand Airport, DeLand Highlands and North DeLand. 

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 2902 8111 2903 8130 2909 8130 2914 8115
TIME...MOT...LOC 2008Z 247DEG 17KT 2907 8125 

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

$$

Combs
274 
WWUS52 KMLB 182014
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
414 PM EDT Tue Aug 18 2020

FLC127-182023-
/O.EXP.KMLB.TO.W.0027.000000T0000Z-200818T2015Z/
Volusia FL-
414 PM EDT Tue Aug 18 2020

...THE TORNADO WARNING FOR CENTRAL VOLUSIA COUNTY WILL EXPIRE AT 415
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 gusty
winds, frequent lightning, and heavy rain are still possible with 
this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Melbourne.

LAT...LON 2902 8111 2903 8130 2909 8130 2914 8115
TIME...MOT...LOC 2013Z 251DEG 16KT 2908 8123 

$$

Combs

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 2:18 PM EDTSpecial Marine WarningMLB117 min
Aug 18, 2:29 PM EDTSpecial Weather StatementMLBVolusia46 min
Aug 18, 2:33 PM EDTSpecial Weather StatementMLBOrange42 min
Aug 18, 2:36 PM EDTAreal Flood AdvisoryMLBVolusia114 min
Aug 18, 2:40 PM EDTSevere Thunderstorm WarningMLBOsceola10 min
Aug 18, 2:46 PM EDTSevere Thunderstorm WarningMLBVolusia44 min
Aug 18, 3:07 PM EDTSpecial Weather StatementMLBSeminole53 min
Aug 18, 3:18 PM EDTSpecial Weather StatementMLBOsceola27 min
Aug 18, 3:27 PM EDTSpecial Weather StatementMLBVolusia48 min
Aug 18, 3:30 PM EDTSpecial Marine WarningMLB2 hr
Aug 18, 3:43 PM EDTSpecial Weather StatementMLBBrevard47 min
Aug 18, 3:47 PM EDTAreal Flood AdvisoryMLBBrevard, Volusia118 min
Aug 18, 3:50 PM EDTSpecial Weather StatementMLBVolusia25 min
Aug 18, 3:56 PM EDTSpecial Weather StatementMLBOsceola34 min
Aug 18, 4:12 PM EDTSpecial Marine WarningMLB55 min
Aug 18, 4:19 PM EDTAreal Flood WarningMLBVolusia3 hr
Aug 18, 4:27 PM EDTSpecial Weather StatementMLBBrevard48 min
Aug 18, 4:40 PM EDTSpecial Weather StatementMLBBrevard50 min
Aug 18, 4:41 PM EDTAreal Flood AdvisoryMLBBrevard94 min
Aug 18, 4:43 PM EDTSevere Thunderstorm WarningMLBBrevard22 min
Aug 18, 4:55 PM EDTSpecial Weather StatementMLBIndian River50 min
Aug 18, 5:17 PM EDTSpecial Weather StatementMLBOkeechobee28 min
Aug 18, 5:26 PM EDTSpecial Marine WarningMLB94 min
Aug 18, 5:32 PM EDTSpecial Marine WarningMLB58 min
Aug 18, 5:46 PM EDTSpecial Weather StatementMLBMartin29 min
Aug 18, 5:54 PM EDTSpecial Weather StatementMLBIndian River51 min
Aug 18, 6:08 PM EDTSpecial Marine WarningMLB2 hr
Aug 18, 6:27 PM EDTSpecial Weather StatementMLBMartin33 min
Aug 18, 6:42 PM EDTSevere Thunderstorm WarningMLBMartin, Saint Lucie35 min
Aug 18, 6:44 PM EDTAreal Flood WarningMLBMartin, Saint Lucie3 hr

Nearby

Tornado Warnings in Florida, 2020Every tornado warning in 2020Tornadoes in 2020

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.