Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 46, NWS Miami, FL

July 23, 2021Broward County, Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 23, 2021, 4:40 PM EDT for Broward County, Palm Beach 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, 4:40 PM EDT (20:40 UTC)
Expired: Jul 23, 2021, 5:30 PM EDT
In force: 50 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Broward County, FL, Palm Beach County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 8.7 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: 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.

794 
WUUS52 KMFL 232040
SVRMFL
FLC011-099-232130-
/O.NEW.KMFL.SV.W.0046.210723T2040Z-210723T2130Z/

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

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Northern Broward County in southeastern Florida...
  Southeastern Palm Beach County in southeastern Florida...

* Until 530 PM EDT.

* At 440 PM EDT, a severe thunderstorm was located near Kings Point,
  or near Delray Beach, 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...
  Pompano Beach, Boca Raton, Deerfield Beach, Boynton Beach and
  Delray Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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.

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

&&

LAT...LON 2647 8033 2665 8011 2644 7988 2624 8014
TIME...MOT...LOC 2040Z 319DEG 13KT 2648 8018 

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

Frye

1 follow-up statement

900 
WWUS52 KMFL 232108
SVSMFL

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

FLC011-099-232130-
/O.CON.KMFL.SV.W.0046.000000T0000Z-210723T2130Z/
Broward FL-Palm Beach FL-
508 PM EDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHERN BROWARD AND SOUTHEASTERN PALM BEACH COUNTIES...

At 507 PM EDT, a severe thunderstorm was located over Boca Raton,
moving southeast at 15 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Pompano Beach, Boca Raton, Deerfield Beach, Boynton Beach and Delray
Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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.

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

&&

LAT...LON 2646 7994 2632 8004 2624 8014 2644 8030
      2656 8012
TIME...MOT...LOC 2107Z 319DEG 13KT 2641 8011 

HAIL...0.75IN
WIND...60MPH
 
$$

Frye

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, 4:42 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, 6:22 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	23 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.