Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Miami, FL

August 7, 2021Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Aug 7, 2021, 4:31 PM EDT for Miami-Dade County, Florida. It was in force for 44 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, 4:31 PM EDT (20:31 UTC)
Expired: Aug 7, 2021, 5:15 PM EDT
In force: 44 min
Issued by: NWS Miami, FL
Hail: 0.00 in
Wind: 30

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 21 km from the middle of the area, began a volume at 20:36 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, 8.5 hours before the alert went out and 47 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.

939 
WWUS82 KMFL 072031
SPSMFL

Special Weather Statement
National Weather Service Miami FL
431 PM EDT Sat Aug 7 2021
 
FLZ073-173-174-072115-
Far South Miami-Dade County FL-Inland Miami-Dade County FL-
Coastal Miami Dade County FL-
431 PM EDT Sat Aug 7 2021

...A strong thunderstorm will impact portions of south central
Miami-Dade County through 515 PM EDT...

At 430 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud near
Florida City, or near Homestead. This storm was nearly stationary.

HAZARD...Funnel clouds and winds in excess of 30 mph.

SOURCE...Radar indicated.

IMPACT...Funnel clouds occasionally touch down and produce tornadoes 
         or waterspouts. Gusty winds could knock down tree limbs and 
         blow around unsecured objects.

Locations impacted include...
Homestead, Homestead Miami Speedway, The Redland, Florida City and
Leisure City.

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.

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

&&

LAT...LON 2552 8047 2539 8033 2528 8047 2544 8060
TIME...MOT...LOC 2030Z 025DEG 0KT 2541 8045 

FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 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, 4:04 PM EDT	Special Weather Statement	MFL	Palm Beach	41 min
Aug 7, 4:22 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	113 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.