Alert archive / Florida / Tornado Warnings in 2020

Tornado Warning 6, NWS Melbourne, FL

April 20, 2020Orange County, Seminole County, Florida

NWS Melbourne, FL issued this tornado warning at Apr 20, 2020, 11:28 AM EDT for Orange County, Seminole County, Florida. It was in force for 32 min. 3 reports 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 20, 2020, 11:28 AM EDT (15:28 UTC)
Expired: Apr 20, 2020, 12:00 PM EDT
In force: 32 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Orange County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 105 km from the middle of the area, began a volume at 15:28 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

Time	Report	Where	Remark
Apr 20, 11:45 AM EDT	TORNADO	1 Wsw Lake Jessup, FL	BASED ON NUMEROUS VIDEOS FROM TRAINED SPOTTERS AND THE PUBLIC, NWS CONFIRMS A WATERSPOUT DEVELOPED ON LAKE JESUP JUST EAST OF SR 417. THE WATERSPOUT MOVED EAST FOR 2.75 MILES AND CAME ONSHORE BRIEFLY AS AN EF-0 TORNADO WITH PEAK WINDS ESTIMATED AT 60-65 MPH.
Apr 20, 11:45 AM EDT	TORNADO	3 N Lake Jessup, FL	TIME ESTIMATED FROM RADAR. SOCIAL MEDIA REPORT OF A TORNADO SOUTH OF THE BOOMBAH SPORTS COMPLEX. BASED ON VIDEO AND WEATHER RADAR DATA, NWS CONFIRMS TORNADO.
Apr 20, 11:47 AM EDT	TSTM WND GST 62	4 Nnw Lake Jessup, FL	SANDFORD AIRPORT REPORTED A WIND GUST OF 62 MPH, 54 KNOTS FROM THE NORTHWEST.

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

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, 3.5 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-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.

262 
WFUS52 KMLB 201528
TORMLB
FLC095-117-201600-
/O.NEW.KMLB.TO.W.0006.200420T1528Z-200420T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Melbourne FL
1128 AM EDT Mon Apr 20 2020

The National Weather Service in Melbourne has issued a

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

* Until noon EDT.
    
* At 1128 AM EDT, a severe thunderstorm capable of producing a
  tornado was located over Wekiwa Springs State Park, or near Apopka,
  moving east or east-southeast 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.

* This dangerous storm will be near...
  Wekiva Springs around 1130 AM EDT.
  Sanford, Casselberry and Lake Mary around 1140 AM EDT.
  Lake Jessup around 1150 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.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Melbourne.

&&

LAT...LON 2878 8155 2878 8150 2879 8148 2878 8142
      2879 8141 2880 8121 2864 8119 2867 8154
      2875 8156
TIME...MOT...LOC 1528Z 265DEG 35KT 2875 8146 

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

$$

Sedlock

1 follow-up statement

230 
WWUS52 KMLB 201538
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1138 AM EDT Mon Apr 20 2020

FLC095-201547-
/O.CAN.KMLB.TO.W.0006.000000T0000Z-200420T1600Z/
Orange FL-
1138 AM EDT Mon Apr 20 2020

...THE TORNADO WARNING FOR NORTHWESTERN ORANGE COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the tornado warning has been 
cancelled for Orange County only.

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

LAT...LON 2872 8140 2875 8140 2879 8141 2880 8121
      2864 8119 2868 8136
TIME...MOT...LOC 1537Z 264DEG 37KT 2876 8134 

$$

FLC117-201600-
/O.CON.KMLB.TO.W.0006.000000T0000Z-200420T1600Z/
Seminole FL-
1138 AM EDT Mon Apr 20 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR
SOUTHWESTERN SEMINOLE COUNTY...
    
At 1137 AM EDT, a severe thunderstorm likely producing a tornado was 
located over Lake Mary, moving east at 40 to 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...
  Sanford around 1140 AM EDT.
  Lake Jessup around 1150 AM EDT.

Other locations impacted by this tornadic thunderstorm include
Heathrow.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 2872 8140 2875 8140 2879 8141 2880 8121
      2864 8119 2868 8136
TIME...MOT...LOC 1537Z 264DEG 37KT 2876 8134 

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, 11:06 AM EDT	Tornado Warning	MLB	Lake, Orange, Seminole	24 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, 11:32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.