Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS Melbourne, FL

June 12, 2021Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 12, 2021, 5:19 PM EDT for Brevard County, Florida. It was in force for 26 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 12, 2021, 5:19 PM EDT (21:19 UTC)
Expired: Jun 12, 2021, 5:45 PM EDT
In force: 26 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), 36 km from the middle of the area, began a volume at 21:18 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 12, 5:20 PM EDT	TSTM WND GST 56	5 N Camp Holly Fish Cam, FL	US AIR FORCE WIND NETWORK TOWER 0403 REPORTED A 56MPH/49KT GUST FROM THE WSW.
Jun 12, 5:25 PM EDT	TSTM WND GST 61	8 Sse Playalinda Beach, FL	US AIR FORCE WIND NETWORK TOWER 0108 REPORTED A 61MPH/53KT GUST FROM THE SW.

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, 9.3 hours before the alert went out and 11 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: 641 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 976 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

053 
WUUS52 KMLB 122119
SVRMLB
FLC009-122145-
/O.NEW.KMLB.SV.W.0017.210612T2119Z-210612T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
519 PM EDT Sat Jun 12 2021

The National Weather Service in Melbourne has issued a

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

* Until 545 PM EDT.

* At 518 PM EDT, a severe thunderstorm was located near Port
  Canaveral, moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Cocoa Beach, Cape Canaveral, Port Canaveral, Merritt Island and
  Kennedy Space Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 2830 8058 2830 8069 2859 8074
      2865 8058 2844 8051
TIME...MOT...LOC 2118Z 254DEG 18KT 2848 8062 

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

Rodriguez

2 follow-up statements

163 
WWUS52 KMLB 122126
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
526 PM EDT Sat Jun 12 2021

FLC009-122145-
/O.CON.KMLB.SV.W.0017.000000T0000Z-210612T2145Z/
Brevard FL-
526 PM EDT Sat Jun 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN BREVARD COUNTY...

At 526 PM EDT, a severe thunderstorm was located near Port 
Canaveral, moving east at 20 mph. A wind gust of 59 mph was measured 
at a wind tower on Cape Canaveral.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Cocoa Beach, Cape Canaveral, Port Canaveral, Merritt Island and
Kennedy Space Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 2830 8058 2830 8065 2841 8068
      2861 8070 2865 8058 2844 8051
TIME...MOT...LOC 2126Z 254DEG 18KT 2849 8057 

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

Rodriguez

485 
WWUS52 KMLB 122135
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
535 PM EDT Sat Jun 12 2021

FLC009-122145-
/O.EXP.KMLB.SV.W.0017.000000T0000Z-210612T2145Z/
Brevard FL-
535 PM EDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BREVARD COUNTY
WILL EXPIRE AT 545 PM EDT...
        
The storm which prompted the warning has moved out into the Atlantic.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 2839 8056 2830 8058 2830 8065 2841 8068
      2861 8070 2865 8058 2844 8051
TIME...MOT...LOC 2135Z 254DEG 18KT 2850 8053 

$$

Rodriguez

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 8:05 PM EDT	Special Weather Statement	MLB	Okeechobee	40 min
Jun 11, 8:28 PM EDT	Special Weather Statement	MLB	Brevard	32 min
Jun 12, 3:36 PM EDT	Special Weather Statement	MLB	Osceola	39 min
Jun 12, 3:42 PM EDT	Special Weather Statement	MLB	Orange	33 min
Jun 12, 4:11 PM EDT	Special Weather Statement	MLB	Brevard	64 min
Jun 12, 4:15 PM EDT	Special Marine Warning	MLB		60 min
Jun 12, 4:16 PM EDT	Special Weather Statement	MLB	Orange	29 min
Jun 12, 4:30 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	30 min
Jun 12, 4:58 PM EDT	Special Marine Warning	MLB		62 min
Jun 12, 5:16 PM EDT	Special Weather Statement	MLB	Brevard	29 min
Jun 12, 5:57 PM EDT	Special Marine Warning	MLB		63 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.