Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 48, NWS Miami, FL

July 23, 2021Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 23, 2021, 6:22 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 23 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, 6:22 PM EDT (22:22 UTC)
Expired: Jul 23, 2021, 6:45 PM EDT
In force: 23 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Broward County, FL, Miami-Dade County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 10.4 hours before the alert went out and 23 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: 1775 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: -23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

568 
WUUS52 KMFL 232222
SVRMFL
FLC011-086-232245-
/O.NEW.KMFL.SV.W.0048.210723T2222Z-210723T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
622 PM EDT Fri Jul 23 2021

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Northern Miami-Dade County in southeastern Florida...
  Southern Broward County in southeastern Florida...

* Until 645 PM EDT.

* At 622 PM EDT, a severe thunderstorm was located over Dania Beach,
  or over Hollywood, moving southeast at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Miami, Fort Lauderdale, Pembroke Pines, Hollywood and Miramar. 

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.

Large hail, damaging winds, and continuous cloud to ground lightning 
is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

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

&&

LAT...LON 2581 8004 2575 8013 2604 8034 2622 8012
      2614 8004
TIME...MOT...LOC 2222Z 321DEG 14KT 2605 8015 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

RAG

2 follow-up statements

923 
WWUS52 KMFL 232233
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
633 PM EDT Fri Jul 23 2021

FLC011-086-232245-
/O.CON.KMFL.SV.W.0048.000000T0000Z-210723T2245Z/
Miami-Dade FL-Broward FL-
633 PM EDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHERN MIAMI-DADE AND SOUTHERN BROWARD COUNTIES...

At 633 PM EDT, a severe thunderstorm was located over Hallandale,
moving southeast at 15 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Fort Lauderdale, Pembroke Pines, Hollywood, Miramar and Pompano
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.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 2589 8004 2585 8011 2604 8034 2622 8012
      2614 8004
TIME...MOT...LOC 2233Z 321DEG 14KT 2602 8012 

TORNADO...POSSIBLE
HAIL...0.88IN
WIND...60MPH
 
$$

RAG

917 
WWUS52 KMFL 232243
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
643 PM EDT Fri Jul 23 2021

FLC011-086-232253-
/O.EXP.KMFL.SV.W.0048.000000T0000Z-210723T2245Z/
Miami-Dade FL-Broward FL-
643 PM EDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MIAMI-DADE AND
SOUTHERN BROWARD COUNTIES WILL EXPIRE AT 645 PM EDT...
                
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 will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 2589 8004 2585 8011 2604 8034 2622 8012
      2614 8004
TIME...MOT...LOC 2243Z 321DEG 14KT 2599 8010 

$$

RAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 8:08 PM EDT	Special Weather Statement	MFL	Glades	52 min
Jul 22, 10:25 PM EDT	Special Weather Statement	MFL	Hendry	50 min
Jul 23, 9:42 AM EDT	Special Marine Warning	MFL		63 min
Jul 23, 1:33 PM EDT	Special Weather Statement	MFL	Miami-Dade	42 min
Jul 23, 1:33 PM EDT	Special Weather Statement	MFL	Miami-Dade	42 min
Jul 23, 2:14 PM EDT	Special Weather Statement	MFL	Miami-Dade	31 min
Jul 23, 2:57 PM EDT	Special Weather Statement	MFL	Palm Beach	63 min
Jul 23, 3:03 PM EDT	Special Weather Statement	MFL	Collier	42 min
Jul 23, 3:52 PM EDT	Special Weather Statement	MFL	Palm Beach	68 min
Jul 23, 4:16 PM EDT	Areal Flood Advisory	MFL	Palm Beach	119 min
Jul 23, 4:16 PM EDT	Special Weather Statement	MFL	Broward	59 min
Jul 23, 4:29 PM EDT	Special Weather Statement	MFL	Broward	46 min
Jul 23, 4:40 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	50 min
Jul 23, 4:42 PM EDT	Special Marine Warning	MFL		93 min
Jul 23, 4:53 PM EDT	Special Weather Statement	MFL	Broward	52 min
Jul 23, 4:56 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Collier, Hendry, Miami-Dade, Monroe, Palm Beach	49 min
Jul 23, 5:17 PM EDT	Special Weather Statement	MFL	Broward	43 min
Jul 23, 5:20 PM EDT	Special Weather Statement	MFL	Palm Beach	55 min
Jul 23, 5:23 PM EDT	Special Marine Warning	MFL		2 hr
Jul 23, 5:24 PM EDT	Special Weather Statement	MFL	Glades	66 min
Jul 23, 5:47 PM EDT	Areal Flood Advisory	MFL	Broward, Palm Beach	118 min
Jul 23, 5:49 PM EDT	Special Weather Statement	MFL	Broward	41 min
Jul 23, 6:03 PM EDT	Special Weather Statement	MFL	Hendry	42 min
Jul 23, 6:12 PM EDT	Special Weather Statement	MFL	Broward	48 min
Jul 23, 6:20 PM EDT	Special Marine Warning	MFL		55 min
Jul 23, 6:27 PM EDT	Special Weather Statement	MFL	Palm Beach	48 min
Jul 23, 6:29 PM EDT	Special Weather Statement	MFL	Miami-Dade	46 min
Jul 23, 6:57 PM EDT	Special Weather Statement	MFL	Hendry	48 min
Jul 23, 7:06 PM EDT	Special Weather Statement	MFL	Palm Beach	39 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.