Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Melbourne, FL

August 2, 2021Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 2, 2021, 3:30 PM EDT for Brevard County, Florida. It was in force for 45 min. 4 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
Aug 2, 2021, 3:30 PM EDT (19:30 UTC)
Expired
Aug 2, 2021, 4:15 PM EDT
In force
45 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), 24 km from the middle of the area, began a volume at 19:29 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

TimeReportWhereRemark
Aug 2, 3:40 PM EDTTSTM WND GST 452 Nnw Cocoa, FLUSAF TOWER KSC-1000 MEASURES WIND GUST OF 39KT/45MPH FROM W
Aug 2, 3:40 PM EDTTSTM WND GST 50Rockledge, FLSPOTTER ESTIMATES WIND GUSTS OF 50-60MPH WITH SMALL TREE BRANCHES DOWN. TIME BASED ON RADAR
Aug 2, 3:49 PM EDTTSTM WND GST 425 Se Cocoa, FLWEATHER UNDERGROUND SITE KFLMERRI184 MEASURES WIND GUST OF 37KT/42MPH FROM WNW
Aug 2, 4:00 PM EDTTSTM WND GST 555 Ne Port Canaveral, FLUSAF TOWER KSC-0003 MEASURES WIND GUST OF 48KT/55MPH FROM W

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, 7.5 hours before the alert went out and 22 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-pSkew-T log-p diagram, Cape Canaveral, FL at 12:00Z on 2021-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1347 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2021-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1347 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
23 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

As transmitted.

525 
WUUS52 KMLB 021930
SVRMLB
FLC009-022015-
/O.NEW.KMLB.SV.W.0033.210802T1930Z-210802T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
330 PM EDT Mon Aug 2 2021

The National Weather Service in Melbourne has issued a

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

* Until 415 PM EDT.

* At 329 PM EDT, a severe thunderstorm was located near 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...
  Melbourne, Rockledge, Cocoa, Cocoa Beach 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 2811 8053
      2814 8086 2835 8086 2837 8088 2842 8088
      2852 8052 2846 8049
TIME...MOT...LOC 1929Z 252DEG 16KT 2828 8080 

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

Kelly
1 follow-up statement
422 
WWUS52 KMLB 022006
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
406 PM EDT Mon Aug 2 2021

FLC009-022016-
/O.EXP.KMLB.SV.W.0033.000000T0000Z-210802T2015Z/
Brevard FL-
406 PM EDT Mon Aug 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BREVARD COUNTY WILL
EXPIRE AT 415 PM EDT...
                
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 will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 2839 8056 2832 8057 2819 8056 2811 8053
      2814 8086 2835 8086 2837 8088 2842 8088
      2852 8052 2846 8049
TIME...MOT...LOC 2006Z 252DEG 16KT 2833 8063 

$$

Kelly

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 8:32 PM EDTSpecial Marine WarningMLB58 min
Aug 1, 9:24 PM EDTSpecial Weather StatementMLBBrevard66 min
Aug 1, 9:30 PM EDTSpecial Marine WarningMLB2 hr
Aug 2, 12:40 PM EDTSpecial Weather StatementMLBSeminole50 min
Aug 2, 12:44 PM EDTSpecial Marine WarningMLB61 min
Aug 2, 1:23 PM EDTSpecial Weather StatementMLBLake52 min
Aug 2, 2:07 PM EDTSpecial Marine WarningMLB53 min
Aug 2, 2:14 PM EDTSpecial Weather StatementMLBOrange46 min
Aug 2, 2:22 PM EDTSpecial Weather StatementMLBVolusia38 min
Aug 2, 2:24 PM EDTAreal Flood AdvisoryMLBVolusia111 min
Aug 2, 2:30 PM EDTSevere Thunderstorm WarningMLBOrange17 min
Aug 2, 2:53 PM EDTAreal Flood AdvisoryMLBOrange112 min
Aug 2, 2:53 PM EDTSpecial Weather StatementMLBOsceola52 min
Aug 2, 3:01 PM EDTSevere Thunderstorm WarningMLBOsceola48 min
Aug 2, 3:02 PM EDTSpecial Marine WarningMLB88 min
Aug 2, 3:14 PM EDTSpecial Marine WarningMLB2 hr
Aug 2, 3:14 PM EDTSevere Thunderstorm WarningMLBBrevard, Orange, Osceola46 min
Aug 2, 3:49 PM EDTSpecial Weather StatementMLBOrange41 min
Aug 2, 4:44 PM EDTSpecial Marine WarningMLB3 hr
Aug 2, 5:04 PM EDTSpecial Weather StatementMLBMartin56 min
Aug 2, 5:07 PM EDTSpecial Weather StatementMLBIndian River38 min
Aug 2, 6:11 PM EDTSpecial Weather StatementMLBOkeechobee, Saint Lucie94 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every 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.