Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 62, NWS Miami, FL

September 4, 2021Broward County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Sep 4, 2021, 3:29 PM EDT for Broward County, Florida. It was in force for 13 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: Sep 4, 2021, 3:29 PM EDT (19:29 UTC)
Expired: Sep 4, 2021, 3:42 PM EDT
In force: 13 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Broward County, FL

The radar

The Miami radar (KAMX), 53 km from the middle of the area, began a volume at 19:30 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, 7.5 hours before the alert went out and 27 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: 845 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

836 
WUUS52 KMFL 041929
SVRMFL
FLC011-042000-
/O.NEW.KMFL.SV.W.0062.210904T1929Z-210904T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
329 PM EDT Sat Sep 4 2021

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Southern Broward County in southeastern Florida...

* Until 400 PM EDT.

* At 329 PM EDT, a severe thunderstorm was located over Chambers
  Estates, or near Hollywood, and is nearly stationary.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Fort Lauderdale, Pembroke Pines, Hollywood, Davie and Dania Beach. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into a
small central room in a sturdy structure.

&&

LAT...LON 2601 8024 2609 8025 2612 8010 2600 8011
TIME...MOT...LOC 1929Z 277DEG 2KT 2605 8022 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hadi

1 follow-up statement

200 
WWUS52 KMFL 041942
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
342 PM EDT Sat Sep 4 2021

FLC011-041952-
/O.CAN.KMFL.SV.W.0062.000000T0000Z-210904T2000Z/
Broward FL-
342 PM EDT Sat Sep 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BROWARD 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 thunderstorm.

LAT...LON 2601 8024 2609 8025 2612 8010 2600 8011
TIME...MOT...LOC 1940Z 277DEG 2KT 2605 8021 

$$

Hadi

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 12:29 PM EDT	Special Weather Statement	MFL	Monroe	31 min
Sep 4, 1:13 PM EDT	Special Weather Statement	MFL	Miami-Dade	32 min
Sep 4, 2:34 PM EDT	Special Weather Statement	MFL	Palm Beach	26 min
Sep 4, 2:39 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	2 hr
Sep 4, 2:44 PM EDT	Areal Flood Advisory	MFL	Broward	2 hr
Sep 4, 2:46 PM EDT	Special Weather Statement	MFL	Broward	29 min
Sep 4, 2:51 PM EDT	Special Marine Warning	MFL		24 min
Sep 4, 2:52 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	113 min
Sep 4, 2:54 PM EDT	Special Marine Warning	MFL		36 min
Sep 4, 3:03 PM EDT	Special Weather Statement	MFL	Palm Beach	27 min
Sep 4, 3:17 PM EDT	Special Weather Statement	MFL	Broward	43 min
Sep 4, 3:25 PM EDT	Special Weather Statement	MFL	Broward	35 min
Sep 4, 3:30 PM EDT	Areal Flood Advisory	MFL	Broward, Miami-Dade	2 hr
Sep 4, 4:17 PM EDT	Special Weather Statement	MFL	Palm Beach	28 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.