Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Melbourne, FL

June 13, 2021Orange County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 13, 2021, 1:21 PM EDT for Orange County, Osceola County, Florida. It was in force for 24 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: Jun 13, 2021, 1:21 PM EDT (17:21 UTC)
Expired: Jun 13, 2021, 1:45 PM EDT
In force: 24 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Orange County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 67 km from the middle of the area, began a volume at 17:24 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
Jun 13, 1:39 PM EDT	HAIL 0.75	3 Se Orlando Internatio, FL	PUBLIC REPORTS HAIL UP TO PENNY SIZE AT THE USTA NATIONAL CAMPUS IN LAKE NONA.

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, 5.4 hours before the alert went out and 79 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: 1128 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: -7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

570 
WUUS52 KMLB 131721
SVRMLB
FLC095-097-131745-
/O.NEW.KMLB.SV.W.0018.210613T1721Z-210613T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
121 PM EDT Sun Jun 13 2021

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  South central Orange County in east central Florida...
  North central Osceola County in east central Florida...

* Until 145 PM EDT.

* At 119 PM EDT, a severe thunderstorm was located over Buena Ventura
  Lakes, moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Orlando, Kissimmee, Buena Ventura Lakes, East Lake Toho and
  Narcoossee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2829 8140 2840 8139 2844 8113 2821 8116
TIME...MOT...LOC 1719Z 275DEG 16KT 2833 8133 

HAIL...<.75IN
WIND...60MPH
 
$$

Kelly

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 12:15 PM EDT	Special Marine Warning	MLB		3 hr
Jun 13, 12:37 PM EDT	Special Weather Statement	MLB	Volusia	38 min
Jun 13, 1:04 PM EDT	Special Weather Statement	MLB	Orange	26 min
Jun 13, 1:36 PM EDT	Special Weather Statement	MLB	Seminole	54 min
Jun 13, 1:41 PM EDT	Severe Thunderstorm Warning	MLB	Orange	11 min
Jun 13, 1:51 PM EDT	Special Weather Statement	MLB	Osceola	39 min
Jun 13, 2:17 PM EDT	Special Weather Statement	MLB	Brevard, Osceola	43 min
Jun 13, 2:24 PM EDT	Special Marine Warning	MLB		81 min
Jun 13, 2:35 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	40 min
Jun 13, 3:44 PM EDT	Special Weather Statement	MLB	Flagler	46 min
Jun 13, 3:46 PM EDT	Special Marine Warning	MLB		59 min
Jun 13, 4:00 PM EDT	Special Weather Statement	MLB	Lake	45 min
Jun 13, 4:26 PM EDT	Special Weather Statement	MLB	Volusia	49 min
Jun 13, 4:37 PM EDT	Special Marine Warning	MLB		53 min
Jun 13, 5:02 PM EDT	Special Weather Statement	MLB	Lake	43 min
Jun 13, 5:18 PM EDT	Special Weather Statement	MLB	Seminole, Volusia	42 min
Jun 13, 5:23 PM EDT	Areal Flood Advisory	MLB	Okeechobee	112 min
Jun 13, 5:33 PM EDT	Special Weather Statement	MLB	Orange	42 min
Jun 13, 7:19 PM EDT	Special Marine Warning	MLB		31 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every severe thunderstorm warning in 2021

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.