Alert archive / Florida / Flash Flood Warnings in 2021

Flash Flood Warning 5, NWS Miami, FL

June 28, 2021Miami-Dade County, Florida

NWS Miami, FL issued this flash flood warning at Jun 28, 2021, 10:27 AM EDT for Miami-Dade County, Florida. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 28, 2021, 10:27 AM EDT (14:27 UTC)
Expired
Jun 28, 2021, 1:30 PM EDT
In force
3 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 6 km from the middle of the area, began a volume at 14:29 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 12:00Z, 2.5 hours before the alert went out and 26 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 2021-06-28Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2021-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
-11 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

898 
WGUS52 KMFL 281427
FFWMFL
FLC086-281730-
/O.NEW.KMFL.FF.W.0005.210628T1427Z-210628T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Miami FL
1027 AM EDT Mon Jun 28 2021

The National Weather Service in Miami has issued a

* Flash Flood Warning for...
  Central Miami-Dade County in southeastern Florida...

* Until 130 PM EDT.

* At 1027 AM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  2 and 3 inches of rain have fallen. Additional rainfall amounts of 
  1.5 to 3 inches are possible in the warned area. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and automated gauges.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Coral Gables, Black Point, Kendall, The Redland, Pinecrest, Cutler 
  Bay, West Perrine, Palmetto Bay, Richmond Heights, Goulds, Zoo 
  Miami, Princeton, Palmetto Estates, South Miami Heights, Howard, 
  The Falls and Three Lakes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 2563 8040 2565 8033 2562 8027 2553 8031
      2552 8034 2556 8039 2558 8040

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

FELL
1 follow-up statement
701 
WGUS72 KMFL 281723
FFSMFL

Flash Flood Statement
National Weather Service Miami FL
123 PM EDT Mon Jun 28 2021

FLC086-281733-
/O.EXP.KMFL.FF.W.0005.000000T0000Z-210628T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Miami-Dade FL-
123 PM EDT Mon Jun 28 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 130 PM EDT THIS AFTERNOON FOR 
CENTRAL MIAMI-DADE COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
significant threat. Please continue to heed remaining road closures 
and lingering water on roadways.

LAT...LON 2563 8040 2565 8033 2562 8027 2553 8031
      2552 8034 2556 8039 2558 8040

$$

FELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 9:03 AM EDTSpecial Weather StatementMFLMiami-Dade42 min
Jun 28, 9:12 AM EDTAreal Flood AdvisoryMFLMiami-Dade2 hr
Jun 28, 9:14 AM EDTSpecial Marine WarningMFL31 min
Jun 28, 9:47 AM EDTSpecial Weather StatementMFLMiami-Dade43 min
Jun 28, 9:54 AM EDTAreal Flood AdvisoryMFLMiami-Dade2 hr
Jun 28, 10:55 AM EDTSpecial Marine WarningMFL65 min
Jun 28, 11:00 AM EDTSpecial Weather StatementMFLMiami-Dade45 min
Jun 28, 11:59 AM EDTSpecial Weather StatementMFLBroward46 min
Jun 28, 12:10 PM EDTSpecial Marine WarningMFL65 min
Jun 28, 12:41 PM EDTSpecial Weather StatementMFLCollier49 min
Jun 28, 1:25 PM EDTSpecial Weather StatementMFLCollier50 min
Jun 28, 1:47 PM EDTSpecial Weather StatementMFLCollier43 min
Jun 28, 1:50 PM EDTSpecial Marine WarningMFL55 min
Jun 28, 2:21 PM EDTSpecial Marine WarningMFL39 min
Jun 28, 3:05 PM EDTSpecial Weather StatementMFLBroward25 min

Nearby

Flash Flood Warnings in Florida, 2021Every flash flood 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; radar from the NEXRAD Level II archive.