Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Miami, FL

June 20, 2021Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 20, 2021, 4:11 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 49 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 20, 2021, 4:11 PM EDT (20:11 UTC)
Expired: Jun 20, 2021, 5:00 PM EDT
In force: 49 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Miami radar (KAMX), 57 km from the middle of the area, began a volume at 20:13 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.

What was reported inside it

Time	Report	Where	Remark
Jun 20, 4:20 PM EDT	TSTM WND GST 52	2 W Weston, FL	NEAR WESTON REGIONAL PARK. RELAYED VIA BROADCAST MEDIA.
Jun 20, 4:41 PM EDT	TSTM WND DMG	1 Nnw Weston, FL	SMALL BRANCHES AND PALM FRONDS DOWN. TIME ESTIMATED. RADAR SUGGESTS WINDS OF 50 TO 60 MPH IN THE AREA AROUND THE TIME OF THIS REPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 8.2 hours before the alert went out and 37 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: 2018 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: -12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

284 
WUUS52 KMFL 202011
SVRMFL
FLC011-086-202100-
/O.NEW.KMFL.SV.W.0028.210620T2011Z-210620T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
411 PM EDT Sun Jun 20 2021

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  North central Miami-Dade County in southeastern Florida...
  Central Broward County in southeastern Florida...

* Until 500 PM EDT.

* At 410 PM EDT, severe thunderstorms were located along a line
  extending from near East Toll Gate On Alligator Alley to near
  Intersection Krome And U.S. 27, moving northeast at 5 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...
  Pembroke Pines, Miramar, Davie, Plantation and Sunrise. 

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.

&&

LAT...LON 2631 8044 2609 8028 2596 8028 2584 8056
      2620 8075
TIME...MOT...LOC 2010Z 220DEG 5KT 2609 8050 2595 8048 

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

Weinman

2 follow-up statements

640 
WWUS52 KMFL 202046
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
446 PM EDT Sun Jun 20 2021

FLC011-086-202100-
/O.CON.KMFL.SV.W.0028.000000T0000Z-210620T2100Z/
Miami-Dade FL-Broward FL-
446 PM EDT Sun Jun 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTHERN MIAMI-DADE AND CENTRAL BROWARD COUNTIES...

At 445 PM EDT, severe thunderstorms were located along a line
extending from 6 miles north of Intersection I-75 And U.S. 27 to near
Sawgrass Mills Mall to Palm Springs North, moving northeast at 10
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...
Pembroke Pines, Miramar, Davie, Plantation and Sunrise. 

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.

&&

LAT...LON 2589 8045 2610 8050 2625 8061 2631 8044
      2609 8028 2596 8028
TIME...MOT...LOC 2045Z 229DEG 9KT 2624 8047 2614 8037 2593 8035 

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

Weinman

005 
WWUS52 KMFL 202057
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
457 PM EDT Sun Jun 20 2021

FLC011-086-202107-
/O.EXP.KMFL.SV.W.0028.000000T0000Z-210620T2100Z/
Miami-Dade FL-Broward FL-
457 PM EDT Sun Jun 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MIAMI-DADE AND
CENTRAL BROWARD COUNTIES WILL EXPIRE AT 500 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 2589 8045 2610 8050 2625 8061 2631 8044
      2609 8028 2596 8028
TIME...MOT...LOC 2057Z 220DEG 5KT 2625 8046 2615 8036 2594 8034 

$$

Weinman

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 2:46 PM EDT	Special Weather Statement	MFL	Broward	44 min
Jun 20, 3:16 PM EDT	Special Weather Statement	MFL	Palm Beach	44 min
Jun 20, 3:27 PM EDT	Special Weather Statement	MFL	Broward	48 min
Jun 20, 3:28 PM EDT	Special Weather Statement	MFL	Palm Beach	47 min
Jun 20, 3:45 PM EDT	Special Weather Statement	MFL	Broward	45 min
Jun 20, 3:56 PM EDT	Special Weather Statement	MFL	Broward	19 min
Jun 20, 4:14 PM EDT	Special Weather Statement	MFL	Broward	61 min
Jun 20, 4:17 PM EDT	Special Weather Statement	MFL	Miami-Dade	58 min
Jun 20, 4:20 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	25 min
Jun 20, 4:26 PM EDT	Special Weather Statement	MFL	Palm Beach	49 min
Jun 20, 4:41 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	49 min
Jun 20, 4:47 PM EDT	Special Weather Statement	MFL	Miami-Dade	43 min
Jun 20, 4:56 PM EDT	Special Marine Warning	MFL		66 min
Jun 20, 5:00 PM EDT	Special Weather Statement	MFL	Broward	30 min
Jun 20, 5:07 PM EDT	Areal Flood Advisory	MFL	Broward, Palm Beach	3 hr
Jun 20, 5:15 PM EDT	Special Weather Statement	MFL	Palm Beach	45 min
Jun 20, 5:15 PM EDT	Special Weather Statement	MFL	Miami-Dade	45 min
Jun 20, 5:26 PM EDT	Special Weather Statement	MFL	Broward	49 min
Jun 20, 5:28 PM EDT	Special Marine Warning	MFL		47 min
Jun 20, 5:28 PM EDT	Special Weather Statement	MFL	Palm Beach	47 min
Jun 20, 5:48 PM EDT	Special Marine Warning	MFL		57 min
Jun 20, 5:50 PM EDT	Special Weather Statement	MFL	Palm Beach	55 min
Jun 20, 5:59 PM EDT	Special Weather Statement	MFL	Miami-Dade	46 min
Jun 20, 6:02 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	3 hr
Jun 20, 6:40 PM EDT	Special Weather Statement	MFL	Hendry	50 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.