Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 56, NWS Miami, FL

August 3, 2021Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Aug 3, 2021, 7:43 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 32 min. 1 report 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
Aug 3, 2021, 7:43 PM EDT (23:43 UTC)
Expired
Aug 3, 2021, 8:15 PM EDT
In force
32 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

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

The radar

The Miami radar (KAMX), 53 km from the middle of the area, began a volume at 23:46 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

TimeReportWhereRemark
Aug 3, 7:50 PM EDTTSTM WND GST 402 Nw Miami, FLA THUNDERSTORM PRODUCED A WIND GUST OF 40 MPH AT MESONET STATION 0235W NEAR MIAMI.

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, 11.7 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-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2021-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1794 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2021-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1794 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
932 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

837 
WUUS52 KMFL 032343
SVRMFL
FLC011-086-040015-
/O.NEW.KMFL.SV.W.0056.210803T2343Z-210804T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
743 PM EDT Tue Aug 3 2021

The National Weather Service in Miami has issued a

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

* Until 815 PM EDT.

* At 743 PM EDT, severe thunderstorms were located along a line
  extending from Coconut Creek to Miami Springs, moving east at 20
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

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

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.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 2630 8008 2596 8010 2569 8020 2569 8032
      2630 8026
TIME...MOT...LOC 2343Z 257DEG 16KT 2628 8016 2581 8028 

HAIL...<.75IN
WIND...60MPH
 
$$

AR
1 follow-up statement
876 
WWUS52 KMFL 040006
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
806 PM EDT Tue Aug 3 2021

FLC011-086-040016-
/O.EXP.KMFL.SV.W.0056.000000T0000Z-210804T0015Z/
Miami-Dade FL-Broward FL-
806 PM EDT Tue Aug 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MIAMI-DADE AND
BROWARD COUNTIES WILL EXPIRE AT 815 PM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose 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 these thunderstorms.

LAT...LON 2630 8008 2596 8010 2569 8020 2569 8032
      2630 8026
TIME...MOT...LOC 0006Z 270DEG 16KT 2627 8006 2580 8018 

$$

AR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 9:55 PM EDTSpecial Weather StatementMFLHendry50 min
Aug 2, 10:48 PM EDTSpecial Weather StatementMFLCollier42 min
Aug 3, 8:38 AM EDTSpecial Marine WarningMFL25 min
Aug 3, 11:37 AM EDTSpecial Weather StatementMFLBroward38 min
Aug 3, 11:43 AM EDTSpecial Weather StatementMFLBroward32 min
Aug 3, 12:14 PM EDTSpecial Weather StatementMFLBroward61 min
Aug 3, 12:22 PM EDTSevere Thunderstorm WarningMFLBroward23 min
Aug 3, 12:35 PM EDTSpecial Marine WarningMFL40 min
Aug 3, 12:39 PM EDTAreal Flood AdvisoryMFLBroward111 min
Aug 3, 1:08 PM EDTSpecial Weather StatementMFLPalm Beach37 min
Aug 3, 1:14 PM EDTSpecial Marine WarningMFL46 min
Aug 3, 1:40 PM EDTSpecial Marine WarningMFL35 min
Aug 3, 1:55 PM EDTAreal Flood AdvisoryMFLBroward2 hr
Aug 3, 2:53 PM EDTSpecial Weather StatementMFLHendry37 min
Aug 3, 4:15 PM EDTSpecial Weather StatementMFLCollier60 min
Aug 3, 4:36 PM EDTAreal Flood AdvisoryMFLCollier54 min
Aug 3, 5:07 PM EDTSpecial Weather StatementMFLGlades38 min
Aug 3, 5:10 PM EDTSpecial Marine WarningMFL35 min
Aug 3, 5:13 PM EDTSpecial Weather StatementMFLCollier, Hendry47 min
Aug 3, 5:56 PM EDTSpecial Weather StatementMFLCollier49 min
Aug 3, 6:00 PM EDTAreal Flood AdvisoryMFLMiami-Dade4 hr
Aug 3, 6:07 PM EDTSpecial Weather StatementMFLBroward38 min
Aug 3, 6:41 PM EDTSpecial Weather StatementMFLBroward, Palm Beach34 min
Aug 3, 7:05 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade40 min
Aug 3, 7:06 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach39 min
Aug 3, 7:25 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade2 hr
Aug 3, 7:26 PM EDTSpecial Marine WarningMFL64 min
Aug 3, 7:37 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade113 min
Aug 3, 7:50 PM EDTAreal Flood AdvisoryMFLPalm Beach115 min
Aug 3, 7:50 PM EDTSpecial Weather StatementMFLPalm Beach40 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every 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.