Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 37, NWS Melbourne, FL

September 7, 2021Brevard County, Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Sep 7, 2021, 5:43 PM EDT for Brevard County, Orange County, Florida. It was in force for 28 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: Sep 7, 2021, 5:43 PM EDT (21:43 UTC)
Expired: Sep 7, 2021, 6:11 PM EDT
In force: 28 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Brevard County, FL, Orange County, FL

The radar

The Melbourne radar (KMLB), 39 km from the middle of the area, began a volume at 21:45 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 nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.7 hours before the alert went out and 37 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: 1096 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 950 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

537 
WUUS52 KMLB 072143
SVRMLB
FLC009-095-072230-
/O.NEW.KMLB.SV.W.0037.210907T2143Z-210907T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
543 PM EDT Tue Sep 7 2021

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  West central Brevard County in east central Florida...
  Southeastern Orange County in east central Florida...

* Until 630 PM EDT.

* At 543 PM EDT, a severe thunderstorm was located near Canaveral
  Groves, or near Lone Cabbage Fish Camp, moving south at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Titusville, Cocoa, Lone Cabbage Fish Camp, Port Saint John and
  Space Coast Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2834 8086 2835 8086 2835 8101 2857 8094
      2856 8079 2834 8076
TIME...MOT...LOC 2143Z 006DEG 13KT 2844 8088 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Smith

2 follow-up statements

715 
WWUS52 KMLB 072200
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
600 PM EDT Tue Sep 7 2021

FLC009-095-072230-
/O.CON.KMLB.SV.W.0037.000000T0000Z-210907T2230Z/
Brevard FL-Orange FL-
600 PM EDT Tue Sep 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR WEST CENTRAL BREVARD AND SOUTHEASTERN ORANGE COUNTIES...

At 600 PM EDT, a severe thunderstorm was located over Lone Cabbage
Fish Camp, moving south at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Cocoa, Lone Cabbage Fish Camp, Port Saint John, Canaveral Groves and
Canaveral Acres.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2834 8086 2835 8086 2835 8101 2850 8096
      2850 8078 2834 8076
TIME...MOT...LOC 2200Z 006DEG 13KT 2838 8089 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Smith

458 
WWUS52 KMLB 072211
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
611 PM EDT Tue Sep 7 2021

FLC009-095-072220-
/O.CAN.KMLB.SV.W.0037.000000T0000Z-210907T2230Z/
Brevard FL-Orange FL-
611 PM EDT Tue Sep 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL BREVARD AND
SOUTHEASTERN ORANGE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 2834 8086 2835 8086 2835 8101 2850 8096
      2850 8078 2834 8076
TIME...MOT...LOC 2209Z 006DEG 13KT 2824 8091 

$$

Smith

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 3:14 AM EDT	Rip Current Statement	MLB	Volusia	6 days
Sep 7, 5:13 PM EDT	Special Weather Statement	MLB	Seminole	62 min
Sep 7, 6:32 PM EDT	Special Weather Statement	MLB	Orange	43 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.