Alert archive / Florida / Tornado Warnings in 2020

Tornado Warning 4, NWS Melbourne, FL

April 20, 2020Lake County, Orange County, Seminole County, Florida

NWS Melbourne, FL issued this tornado warning at Apr 20, 2020, 11:06 AM EDT for Lake County, Orange County, Seminole County, Florida. It was in force for 24 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: Apr 20, 2020, 11:06 AM EDT (15:06 UTC)
Expired: Apr 20, 2020, 11:30 AM EDT
In force: 24 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Lake County, FL, Orange County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 15:06 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
Apr 20, 7:02 AM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 3.1 hours before the alert went out and 109 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: 2398 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 224 m²/s²
0-3 km storm-relative helicity: 268 m²/s²
Significant tornado parameter: 4.0
Supercell composite: 18.3

Open this sounding in Storm Lab

The text

As transmitted.

616 
WFUS52 KMLB 201506
TORMLB
FLC069-095-117-201530-
/O.NEW.KMLB.TO.W.0004.200420T1506Z-200420T1530Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
1106 AM EDT Mon Apr 20 2020

The National Weather Service in Melbourne has issued a

* Tornado Warning for...
  Northwestern Seminole County in east central Florida...
  Central Lake County in east central Florida...
  Northwestern Orange County in east central Florida...

* Until 1130 AM EDT.
    
* At 1105 AM EDT, a severe thunderstorm capable of producing a 
  tornado was located near Howey-In-the-hills, moving east at 45 
  to 50 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...
  Mount Plymouth, Zellwood and Sorrento around 1120 AM EDT.
  Lake Mary around 1130 AM EDT.

Other locations impacted by this tornadic thunderstorm include Lake
Dora.

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 2891 8142 2874 8133 2864 8175 2879 8182
TIME...MOT...LOC 1505Z 259DEG 43KT 2874 8172 

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

$$

Sedlock

1 follow-up statement

024 
WWUS52 KMLB 201517
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1117 AM EDT Mon Apr 20 2020

FLC069-201526-
/O.CAN.KMLB.TO.W.0004.000000T0000Z-200420T1530Z/
Lake FL-
1117 AM EDT Mon Apr 20 2020

...THE TORNADO WARNING FOR CENTRAL LAKE COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning left Lake 
County. Therefore, the warning has been cancelled for Lake County.

A Severe Thunderstorm Watch remains in effect until 300 PM EDT for
east central Florida.

LAT...LON 2878 8165 2879 8165 2878 8142 2879 8141
      2881 8142 2883 8142 2884 8140 2884 8138
      2874 8133 2866 8166 2867 8166
TIME...MOT...LOC 1516Z 260DEG 38KT 2875 8160 

$$

FLC095-117-201530-
/O.CON.KMLB.TO.W.0004.000000T0000Z-200420T1530Z/
Seminole FL-Orange FL-
1117 AM EDT Mon Apr 20 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 AM EDT FOR
NORTHWESTERN SEMINOLE AND NORTHWESTERN ORANGE COUNTIES...
    
At 1116 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Zellwood, moving east-southeast 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...
  Wekiwa Springs State Park around 1130 AM EDT.
  Lake Mary around 1140 AM EDT.

Other locations impacted by this tornadic thunderstorm include Rock
Springs.

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 2878 8165 2879 8165 2878 8142 2879 8141
      2881 8142 2883 8142 2884 8140 2884 8138
      2874 8133 2866 8166 2867 8166
TIME...MOT...LOC 1516Z 260DEG 38KT 2875 8160 

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

$$

Sedlock

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 3:06 AM EDT	Lake Wind Advisory	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	17 hr
Apr 20, 9:41 AM EDT	Special Weather Statement	MLB	Volusia	64 min
Apr 20, 10:12 AM EDT	Severe Thunderstorm Warning	MLB	Lake, Volusia	63 min
Apr 20, 10:32 AM EDT	Special Weather Statement	MLB	Lake	43 min
Apr 20, 10:38 AM EDT	Special Marine Warning	MLB		119 min
Apr 20, 10:42 AM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Seminole, Volusia	63 min
Apr 20, 10:49 AM EDT	Tornado Warning	MLB	Volusia	26 min
Apr 20, 11:10 AM EDT	Severe Thunderstorm Warning	MLB	Seminole, Volusia	50 min
Apr 20, 11:13 AM EDT	Tornado Warning	MLB	Volusia	32 min
Apr 20, 11:28 AM EDT	Tornado Warning	MLB	Orange, Seminole	32 min
Apr 20, 11:32 AM EDT	Special Marine Warning	MLB		2 hr
Apr 20, 11:44 AM EDT	Severe Thunderstorm Warning	MLB	Brevard, Seminole, Volusia	46 min
Apr 20, 11:48 AM EDT	Tornado Warning Tornado observed	MLB	Brevard, Seminole, Volusia	42 min
Apr 20, 11:59 AM EDT	Tornado Warning	MLB	Brevard	31 min
Apr 20, 12:14 PM EDT	Tornado Warning	MLB	Brevard	31 min
Apr 20, 12:16 PM EDT	Tornado Warning	MLB	Brevard	29 min
Apr 20, 12:56 PM EDT	Special Weather Statement	MLB	Osceola	64 min
Apr 20, 1:05 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	55 min
Apr 20, 1:52 PM EDT	Special Weather Statement	MLB	Brevard	53 min
Apr 20, 1:56 PM EDT	Special Marine Warning	MLB		68 min
Apr 20, 2:43 PM EDT	Special Weather Statement	MLB	Osceola	47 min
Apr 20, 3:02 PM EDT	Special Weather Statement	MLB	Okeechobee	58 min
Apr 20, 4:40 PM EDT	Special Marine Warning	MLB		2 hr
Apr 20, 4:44 PM EDT	Special Weather Statement	MLB	Okeechobee	46 min
Apr 20, 5:06 PM EDT	Special Weather Statement	MLB	Martin	39 min
Apr 20, 5:16 PM EDT	Severe Thunderstorm Warning	MLB	Martin, Saint Lucie	33 min
Apr 20, 5:21 PM EDT	Tornado Warning	MLB	Martin	24 min
Apr 20, 5:41 PM EDT	Special Marine Warning	MLB		49 min

Nearby

Tornado Warnings in Florida, 2020 Every tornado warning in 2020 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.