Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Miami, FL

August 15, 2021Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Aug 15, 2021, 1:21 AM EDT for Miami-Dade County, Florida. It was in force for 39 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
Aug 15, 2021, 1:21 AM EDT (05:21 UTC)
Expired
Aug 15, 2021, 2:00 AM EDT
In force
39 min
Issued by
NWS Miami, FL
Hail
0.00 in
Wind
40

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 35 km from the middle of the area, began a volume at 05:21 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.

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 5.4 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 2021-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1620 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 2021-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 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
1620 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
816 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

112 
WWUS82 KMFL 150521
SPSMFL

Special Weather Statement
National Weather Service Miami FL
121 AM EDT Sun Aug 15 2021
 
FLZ072>074-172-173-150600-
Coastal Broward County FL-Metro Broward County FL-
Metropolitan Miami Dade FL-Inland Miami-Dade County FL-
Coastal Miami Dade County FL-
121 AM EDT Sun Aug 15 2021

...A strong thunderstorm will impact portions of northern Miami-Dade
and southern Broward Counties through 200 AM EDT...

At 121 AM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm over Coconut Grove, or near Coral Gables,
moving northwest at 30 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Miami, Hialeah, Hollywood, Miramar, Miami Beach, Coral Gables, Key
Biscayne, South Miami, Surfside, Hallandale, Miami Gardens, Virginia
Key, Kendall, North Miami, Doral, North Miami Beach, Aventura, Dania
Beach, Miami Lakes and Hialeah Gardens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

&&

LAT...LON 2582 8004 2569 8007 2557 8023 2579 8044
      2606 8016 2590 8004
TIME...MOT...LOC 0521Z 133DEG 25KT 2572 8022 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

SPM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 8:04 PM EDTSpecial Marine WarningMFL41 min
Aug 14, 8:06 PM EDTSpecial Weather StatementMFLCollier39 min
Aug 14, 8:18 PM EDTSpecial Weather StatementMFLMonroe42 min
Aug 14, 8:34 PM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
Aug 14, 8:54 PM EDTSpecial Weather StatementMFLMonroe51 min
Aug 14, 8:58 PM EDTAreal Flood AdvisoryMFLCollier3 hr
Aug 14, 9:02 PM EDTSpecial Weather StatementMFLMiami-Dade43 min
Aug 14, 9:03 PM EDTSpecial Marine WarningMFL42 min
Aug 14, 9:30 PM EDTSpecial Marine WarningMFL45 min
Aug 14, 9:39 PM EDTSpecial Weather StatementMFLBroward, Collier51 min
Aug 14, 9:42 PM EDTSpecial Marine WarningMFL63 min
Aug 14, 9:51 PM EDTSpecial Weather StatementMFLMiami-Dade39 min
Aug 14, 9:58 PM EDTSpecial Marine WarningMFL32 min
Aug 14, 10:07 PM EDTSpecial Marine WarningMFL38 min
Aug 14, 10:26 PM EDTSpecial Weather StatementMFLHendry, Palm Beach49 min
Aug 14, 11:22 PM EDTSpecial Weather StatementMFLGlades38 min
Aug 14, 11:38 PM EDTSpecial Marine WarningMFL52 min
Aug 15, 1:13 AM EDTSpecial Marine WarningMFL47 min
Aug 15, 1:16 AM EDTSpecial Marine WarningMFL44 min
Aug 15, 1:17 AM EDTSpecial Weather StatementMFLMiami-Dade28 min
Aug 15, 1:19 AM EDTSpecial Marine WarningMFL56 min
Aug 15, 1:49 AM EDTSpecial Weather StatementMFLMiami-Dade41 min
Aug 15, 3:06 AM EDTSpecial Weather StatementMFLCollier24 min
Aug 15, 4:29 AM EDTSpecial Marine WarningMFL46 min
Aug 15, 7:26 AM EDTSpecial Weather StatementMFLMiami-Dade34 min
Aug 15, 3:35 PM EDTSpecial Marine WarningMFL55 min
Aug 15, 4:02 PM EDTSpecial Weather StatementMFLMiami-Dade43 min
Aug 15, 4:25 PM EDTSpecial Marine WarningMFL65 min
Aug 15, 5:10 PM EDTSpecial Weather StatementMFLMiami-Dade50 min
Aug 15, 5:25 PM EDTSpecial Marine WarningMFL65 min
Aug 15, 6:34 PM EDTSpecial Marine WarningMFL56 min
Aug 15, 7:28 PM EDTSpecial Marine WarningMFL2 hr

Nearby

Special Weather Statements in Florida, 2021Every special weather statement 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; radar from the NEXRAD Level II archive.