Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Melbourne, FL

June 13, 2021Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 13, 2021, 2:35 PM EDT for Brevard County, Florida. It was in force for 40 min. 2 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: Jun 13, 2021, 2:35 PM EDT (18:35 UTC)
Expired: Jun 13, 2021, 3:15 PM EDT
In force: 40 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 30 km from the middle of the area, began a volume at 18:38 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, 2:35 PM EDT	TSTM WND DMG	1 Wnw Cocoa, FL	NWS MELBOURNE CAN CONFIRM STRAIGHT-LINE WINDS, ESTIMATED BETWEEN 65-70 MPH, OCCURRED AT THE COCOA BAY MOBILE HOME COMMUNITY AROUND 235 PM. BASED ON INFORMATION PROVIDED BY BREVARD COUNTY EM, COCOA FIRE DEPARTMENT, LOCAL NEWS MEDIA, AND EYE WITNESS REPORTS THE
Jun 13, 2:35 PM EDT	TSTM WND DMG	1 Wnw Cocoa, FL	COCOA FD REPORTED ROOF DAMAGE TO SEVERAL HOMES ALONG COCOA BAY BLVD., IN COCOA.

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, 6.6 hours before the alert went out and 24 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.

147 
WUUS52 KMLB 131835
SVRMLB
FLC009-131915-
/O.NEW.KMLB.SV.W.0020.210613T1835Z-210613T1915Z/

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

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  Central Brevard County in east central Florida...

* Until 315 PM EDT.

* At 234 PM EDT, a severe thunderstorm was located over Rockledge,
  moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Merritt Island, Rockledge, Cocoa, Cocoa Beach, Cape Canaveral and 
  Satellite Beach. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 2839 8056 2832 8057 2819 8056 2815 8084
      2829 8086 2835 8086 2837 8088 2847 8090
      2847 8087 2849 8088 2851 8051 2846 8049
TIME...MOT...LOC 1834Z 262DEG 18KT 2834 8076 

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

Kelly

1 follow-up statement

946 
WWUS52 KMLB 131913
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
313 PM EDT Sun Jun 13 2021

FLC009-131922-
/O.EXP.KMLB.SV.W.0020.000000T0000Z-210613T1915Z/
Brevard FL-
313 PM EDT Sun Jun 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BREVARD COUNTY WILL
EXPIRE AT 315 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However heavy rain is still possible with this
thunderstorm.

LAT...LON 2839 8056 2832 8057 2819 8056 2815 8084
      2829 8086 2835 8086 2837 8088 2847 8090
      2847 8087 2849 8088 2851 8051 2846 8049
TIME...MOT...LOC 1912Z 262DEG 18KT 2837 8055 

$$

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, 1:21 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	24 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, 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.