Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Melbourne, FL

August 7, 2021Osceola County, Florida

NWS Melbourne, FL issued this special weather statement at Aug 7, 2021, 6:45 PM EDT for Osceola County, Florida. It was in force for 45 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 7, 2021, 6:45 PM EDT (22:45 UTC)
Expired: Aug 7, 2021, 7:30 PM EDT
In force: 45 min
Issued by: NWS Melbourne, FL
Hail: 0.00 in
Wind: 40

County Osceola County, FL

The radar

The Melbourne radar (KMLB), 52 km from the middle of the area, began a volume at 22:44 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, 10.8 hours before the alert went out and 92 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: 725 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1093 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

960 
WWUS82 KMLB 072245
SPSMLB

Special Weather Statement
National Weather Service Melbourne FL
645 PM EDT Sat Aug 7 2021
 
FLZ053-072330-
Osceola FL-
645 PM EDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of southern Osceola 
County through 730 PM EDT...

At 645 PM EDT, Doppler radar was tracking a strong thunderstorm near
Kenansville, moving east at 15 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Kenansville and Lake Marian. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2801 8087 2782 8087 2782 8088 2773 8088
      2773 8087 2770 8087 2767 8114 2771 8115
      2773 8117 2774 8116 2775 8118 2776 8117
      2778 8119 2784 8122
TIME...MOT...LOC 2245Z 260DEG 12KT 2780 8101 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Sedlock

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 4:18 PM EDT	Special Weather Statement	MLB	Orange	42 min
Aug 7, 5:17 PM EDT	Special Weather Statement	MLB	Lake	43 min
Aug 7, 5:51 PM EDT	Special Weather Statement	MLB	Volusia	24 min
Aug 7, 6:30 PM EDT	Special Marine Warning	MLB		2 hr
Aug 7, 6:41 PM EDT	Special Weather Statement	MLB	Brevard	49 min
Aug 7, 7:23 PM EDT	Special Weather Statement	MLB	Brevard	37 min

Nearby

Special Weather Statements in Florida, 2021 Every special weather statement 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.