Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Melbourne, FL

July 23, 2021Orange County, Florida

NWS Melbourne, FL issued this special weather statement at Jul 23, 2021, 5:55 PM EDT for Orange County, Florida. It was in force for 50 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: Jul 23, 2021, 5:55 PM EDT (21:55 UTC)
Expired: Jul 23, 2021, 6:45 PM EDT
In force: 50 min
Issued by: NWS Melbourne, FL

County Orange County, FL

The radar

The Melbourne radar (KMLB), 98 km from the middle of the area, began a volume at 21:55 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, 9.9 hours before the alert went out and 96 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: 1415 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

347 
WWUS82 KMLB 232155
SPSMLB

Special Weather Statement
National Weather Service Melbourne FL
555 PM EDT Fri Jul 23 2021
 
FLZ045-046-232245-
Orange FL-Seminole FL-
555 PM EDT Fri Jul 23 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SEMINOLE AND
WEST-CENTRAL ORANGE COUNTIES UNTIL 645 PM EDT...

At 554 PM EDT, Doppler radar was tracking a strong thunderstorm over
Forest City, or over Apopka, moving southeast at 15 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Orlando, Apopka, Altamonte Springs, Ocoee and Winter Garden. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 2875 8134 2858 8121 2841 8161 2861 8166
      2862 8166
TIME...MOT...LOC 2154Z 308DEG 15KT 2868 8147 

$$

Sedlock

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 8:01 PM EDT	Special Marine Warning	MLB		44 min
Jul 23, 1:54 PM EDT	Special Weather Statement	MLB	Seminole	51 min
Jul 23, 2:24 PM EDT	Areal Flood Advisory	MLB	Brevard, Volusia	111 min
Jul 23, 2:26 PM EDT	Special Marine Warning	MLB		2 hr
Jul 23, 2:30 PM EDT	Special Weather Statement	MLB	Volusia	45 min
Jul 23, 3:26 PM EDT	Areal Flood Advisory	MLB	Lake	2 hr
Jul 23, 5:26 PM EDT	Special Weather Statement	MLB	Lake	49 min
Jul 23, 6:22 PM EDT	Special Weather Statement	MLB	Orange	53 min
Jul 23, 6:36 PM EDT	Special Weather Statement	MLB	Martin	24 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.