Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 30, NWS Melbourne, FL

August 2, 2021Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 2, 2021, 2:30 PM EDT for Orange County, Florida. It was in force for 17 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: Aug 2, 2021, 2:30 PM EDT (18:30 UTC)
Expired: Aug 2, 2021, 2:47 PM EDT
In force: 17 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Orange County, FL

The radar

The Melbourne radar (KMLB), 61 km from the middle of the area, began a volume at 18:29 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.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 6.5 hours before the alert went out and 62 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: 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.

223 
WUUS52 KMLB 021830
SVRMLB
FLC095-021915-
/O.NEW.KMLB.SV.W.0030.210802T1830Z-210802T1915Z/

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

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  Eastern Orange County in east central Florida...

* Until 315 PM EDT.

* At 229 PM EDT, a severe thunderstorm was located near Avalon Park,
  moving east at 15 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Wedgefield, Avalon Park, Christmas and Bithlo. 

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 2840 8122 2850 8124 2861 8102 2841 8097
TIME...MOT...LOC 1829Z 257DEG 11KT 2845 8117 

HAIL...0.75IN
WIND...60MPH
 
$$

Kelly

1 follow-up statement

301 
WWUS52 KMLB 021847
SVSMLB

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

FLC095-021856-
/O.CAN.KMLB.SV.W.0030.000000T0000Z-210802T1915Z/
Orange FL-
247 PM EDT Mon Aug 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ORANGE COUNTY 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.  However gusty winds and 
heavy rain are still possible with this and other thunderstorms in 
east Orange county late this afternoon.

LAT...LON 2840 8122 2850 8124 2861 8102 2841 8097
TIME...MOT...LOC 1845Z 257DEG 11KT 2846 8111 

$$

Kelly

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 8:32 PM EDT	Special Marine Warning	MLB		58 min
Aug 1, 9:24 PM EDT	Special Weather Statement	MLB	Brevard	66 min
Aug 1, 9:30 PM EDT	Special Marine Warning	MLB		2 hr
Aug 2, 12:40 PM EDT	Special Weather Statement	MLB	Seminole	50 min
Aug 2, 12:44 PM EDT	Special Marine Warning	MLB		61 min
Aug 2, 1:23 PM EDT	Special Weather Statement	MLB	Lake	52 min
Aug 2, 2:07 PM EDT	Special Marine Warning	MLB		53 min
Aug 2, 2:14 PM EDT	Special Weather Statement	MLB	Orange	46 min
Aug 2, 2:22 PM EDT	Special Weather Statement	MLB	Volusia	38 min
Aug 2, 2:24 PM EDT	Areal Flood Advisory	MLB	Volusia	111 min
Aug 2, 2:53 PM EDT	Areal Flood Advisory	MLB	Orange	112 min
Aug 2, 2:53 PM EDT	Special Weather Statement	MLB	Osceola	52 min
Aug 2, 3:01 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	48 min
Aug 2, 3:02 PM EDT	Special Marine Warning	MLB		88 min
Aug 2, 3:14 PM EDT	Special Marine Warning	MLB		2 hr
Aug 2, 3:14 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange, Osceola	46 min
Aug 2, 3:30 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	45 min
Aug 2, 3:49 PM EDT	Special Weather Statement	MLB	Orange	41 min
Aug 2, 4:44 PM EDT	Special Marine Warning	MLB		3 hr
Aug 2, 5:04 PM EDT	Special Weather Statement	MLB	Martin	56 min
Aug 2, 5:07 PM EDT	Special Weather Statement	MLB	Indian River	38 min
Aug 2, 6:11 PM EDT	Special Weather Statement	MLB	Okeechobee, Saint Lucie	94 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.