Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Miami, FL

August 7, 2021Palm Beach County, Florida

NWS Miami, FL issued this special weather statement at Aug 7, 2021, 4:04 PM EDT for Palm Beach County, Florida. It was in force for 41 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, 4:04 PM EDT (20:04 UTC)
Expired: Aug 7, 2021, 4:45 PM EDT
In force: 41 min
Issued by: NWS Miami, FL
Hail: 0.00 in
Wind: 40
Spout: Possible

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 91 km from the middle of the area, began a volume at 20:04 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

Miami, FL (KMFL), launched 12:00Z, 8.1 hours before the alert went out and 72 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: 2842 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

431 
WWUS82 KMFL 072004
SPSMFL

Special Weather Statement
National Weather Service Miami FL
404 PM EDT Sat Aug 7 2021
 
FLZ067-071-072045-
Inland Broward County FL-Inland Palm Beach County FL-
404 PM EDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of southwestern Palm
Beach County through 445 PM EDT...

At 404 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a landspout 11 miles east
of Holey Land Wildlife Refuge, or 19 miles southeast of Belle Glade.
This storm was nearly stationary.

HAZARD...Landspouts and winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible. Gusty winds 
         could knock down tree limbs and blow around unsecured 
         objects.

Locations impacted include...
Loxahatchee NWR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.

&&

LAT...LON 2631 8066 2649 8073 2658 8043 2640 8035
TIME...MOT...LOC 2004Z 235DEG 4KT 2643 8054 

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

$$

Weinman

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 7:32 AM EDT	Special Weather Statement	MFL	Palm Beach	28 min
Aug 7, 7:37 AM EDT	Special Marine Warning	MFL		23 min
Aug 7, 8:43 AM EDT	Areal Flood Advisory	MFL	Palm Beach	2 hr
Aug 7, 10:03 AM EDT	Special Weather Statement	MFL	Miami-Dade	27 min
Aug 7, 10:29 AM EDT	Special Weather Statement	MFL	Miami-Dade	31 min
Aug 7, 11:04 AM EDT	Special Weather Statement	MFL	Palm Beach	41 min
Aug 7, 1:54 PM EDT	Special Weather Statement	MFL	Hendry	51 min
Aug 7, 2:48 PM EDT	Areal Flood Advisory	MFL	Collier	117 min
Aug 7, 3:18 PM EDT	Areal Flood Advisory	MFL	Palm Beach	117 min
Aug 7, 3:29 PM EDT	Special Weather Statement	MFL	Palm Beach	46 min
Aug 7, 3:39 PM EDT	Special Weather Statement	MFL	Palm Beach	36 min
Aug 7, 3:48 PM EDT	Special Weather Statement	MFL	Miami-Dade	42 min
Aug 7, 4:22 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	113 min
Aug 7, 4:31 PM EDT	Special Weather Statement	MFL	Miami-Dade	44 min
Aug 7, 4:44 PM EDT	Special Weather Statement	MFL	Miami-Dade	46 min
Aug 7, 4:49 PM EDT	Special Weather Statement	MFL	Palm Beach	41 min
Aug 7, 5:02 PM EDT	Special Weather Statement	MFL	Broward	43 min
Aug 7, 5:41 PM EDT	Areal Flood Advisory	MFL	Broward	64 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.