Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 45, NWS Miami, FL

July 12, 2021Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 12, 2021, 8:35 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 25 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
Jul 12, 2021, 8:35 PM EDT (00:35 UTC)
Expired
Jul 12, 2021, 9:00 PM EDT
In force
25 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), 12 km from the middle of the area, began a volume at 00:38 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
Jul 12, 8:38 PM EDTTSTM WND DMG2 Nne Miami, FLLOCAL BROADCAST MEDIA RELAYED REPORT OF A LARGE TREE THAT FELL ON A CAR ON NEAR THE INTERSECTION OF THE VENETIAN CAUSEWAY AND HERALD PLAZA. TIME ESTIMATED FROM RADAR.
Jul 12, 8:40 PM EDTTSTM WND GST 442 Nw Miami, FLMESONET STATION 0235W 1.6 NW MIAMI (WEATHERSTEM) RECORDED A WIND GUST OF 44 MPH (38 KT) ASSOCIATED WITH A STRONG THUNDERSTORM. STATION ELEVATION: 187 FT.

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 00:00Z, 0.6 hours before the alert went out and 15 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 00:00Z on 2021-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2400 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 00:00Z on 2021-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
2400 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
835 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

478 
WUUS52 KMFL 130035
SVRMFL
FLC011-086-130100-
/O.NEW.KMFL.SV.W.0045.210713T0035Z-210713T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
835 PM EDT Mon Jul 12 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 900 PM EDT.

* At 835 PM EDT, severe thunderstorms were located along a line
  extending from Golden Glades to near Black Point, moving west at 25
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

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

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 2547 8023 2546 8065 2608 8049 2598 8010
TIME...MOT...LOC 0035Z 093DEG 20KT 2592 8018 2555 8028 

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

DH
3 follow-up statements
357 
WWUS52 KMFL 130042
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
842 PM EDT Mon Jul 12 2021

FLC011-130052-
/O.CAN.KMFL.SV.W.0045.000000T0000Z-210713T0100Z/
Broward FL-
842 PM EDT Mon Jul 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BROWARD COUNTY IS
CANCELLED...

The storms which prompted the warning have weakened. Therefore, the 
warning has been cancelled.

LAT...LON 2575 8029 2560 8030 2562 8054 2579 8057
      2596 8051 2596 8038 2594 8017
TIME...MOT...LOC 0042Z 094DEG 25KT 2591 8028 2576 8038 2554 8038 

$$

FLC086-130100-
/O.CON.KMFL.SV.W.0045.000000T0000Z-210713T0100Z/
Miami-Dade FL-
842 PM EDT Mon Jul 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHERN MIAMI-DADE COUNTY...

At 842 PM EDT, severe thunderstorms were located along a line
extending from Opa-Locka to Sweetwater to Princeton, moving west at
30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Miami, Hialeah, Miramar, South Miami and Miami Gardens. 

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 2575 8029 2560 8030 2562 8054 2579 8057
      2596 8051 2596 8038 2594 8017
TIME...MOT...LOC 0042Z 094DEG 25KT 2591 8028 2576 8038 2554 8038 

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

DH
053 
WWUS52 KMFL 130050
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
850 PM EDT Mon Jul 12 2021

FLC086-130100-
/O.CON.KMFL.SV.W.0045.000000T0000Z-210713T0100Z/
Miami-Dade FL-
850 PM EDT Mon Jul 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTH CENTRAL MIAMI-DADE COUNTY...

At 850 PM EDT, severe thunderstorms were located along a line
extending from Miami Lakes to Tamiami to Princeton, moving west at 25
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Hialeah, Miramar, Miami Gardens, North Miami and Doral. 

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 2583 8031 2574 8033 2577 8057 2579 8057
      2596 8051 2596 8038 2594 8017 2586 8024
TIME...MOT...LOC 0050Z 093DEG 20KT 2591 8032 2576 8042 2554 8042 

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

DH
803 
WWUS52 KMFL 130056
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
856 PM EDT Mon Jul 12 2021

FLC086-130106-
/O.EXP.KMFL.SV.W.0045.000000T0000Z-210713T0100Z/
Miami-Dade FL-
856 PM EDT Mon Jul 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MIAMI-DADE
COUNTY WILL EXPIRE AT 900 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 are still possible with these thunderstorms.

LAT...LON 2583 8031 2574 8033 2577 8057 2579 8057
      2596 8051 2596 8038 2594 8017 2586 8024
TIME...MOT...LOC 0056Z 093DEG 20KT 2591 8035 2576 8045 2554 8045 

$$

DH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 8:10 PM EDTSpecial Marine WarningMFL50 min
Jul 12, 8:24 PM EDTSpecial Weather StatementMFLMiami-Dade36 min
Jul 12, 8:55 PM EDTSpecial Weather StatementMFLBroward50 min
Jul 12, 9:22 PM EDTSpecial Marine WarningMFL53 min
Jul 13, 5:00 AM EDTSpecial Marine WarningMFL45 min
Jul 13, 1:10 PM EDTSpecial Marine WarningMFL35 min
Jul 13, 1:15 PM EDTSpecial Marine WarningMFL60 min
Jul 13, 1:30 PM EDTSpecial Weather StatementMFLCollier60 min
Jul 13, 1:41 PM EDTSpecial Marine WarningMFL25 min
Jul 13, 1:45 PM EDTSpecial Marine WarningMFL60 min
Jul 13, 1:53 PM EDTSpecial Weather StatementMFLHendry52 min
Jul 13, 3:49 PM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
Jul 13, 3:51 PM EDTSpecial Marine WarningMFL54 min
Jul 13, 4:55 PM EDTSpecial Marine WarningMFL65 min
Jul 13, 5:09 PM EDTSpecial Weather StatementMFLHendry36 min
Jul 13, 5:25 PM EDTSpecial Marine WarningMFL35 min
Jul 13, 5:33 PM EDTSpecial Weather StatementMFLPalm Beach27 min
Jul 13, 6:36 PM EDTSpecial Marine WarningMFL39 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.