Alert archive / Florida / Flash Flood Warnings in 2021

Flash Flood Warning 6, NWS Miami, FL

July 12, 2021Miami-Dade County, Florida

NWS Miami, FL issued this flash flood warning at Jul 12, 2021, 12:34 PM EDT for Miami-Dade County, Florida. It was in force for 2 hr. 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, 12:34 PM EDT (16:34 UTC)
Expired
Jul 12, 2021, 3:03 PM EDT
In force
2 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 36 km from the middle of the area, began a volume at 16:37 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, 1:04 PM EDTFLOOD4 Ese North Miami, FLNWS METEOROLOGIST REPORTS WATER UP TO THE CURB ON COLLINS AVENUE.
Jul 12, 1:46 PM EDTFLOOD4 Ese North Miami, FLSOCIAL MEDIA REPORT OF SIGNIFICANT STREET FLOODING AT THE INTERSECTION OF 86TH STREET AND HARDING. WATER HALFWAY UP THE TIRES OF PASSING VEHICLES.

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, 4.6 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 12:00Z on 2021-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1528 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 12:00Z on 2021-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -71 square meters per square second.193958Sfc1 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
1528 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1074 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-71 m²/s²
0-3 km storm-relative helicity
-51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

297 
WGUS52 KMFL 121634
FFWMFL
FLC086-121915-
/O.NEW.KMFL.FF.W.0006.210712T1634Z-210712T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Miami FL
1234 PM EDT Mon Jul 12 2021

The National Weather Service in Miami has issued a

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

* Until 315 PM EDT.

* At 1234 PM 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 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...
  Miami, Miami Beach, Surfside, Virginia Key, North Miami, North 
  Miami Beach, Miami Shores, North Bay Village, El Portal, Port Of 
  Miami, Little Haiti, Fisher Island, Downtown Miami, West Little 
  River, Golden Glades, Bay Harbor Islands, Biscayne Park and Bal 
  Harbour.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2576 8020 2591 8019 2589 8009 2589 8008
      2574 8009

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

FELL
1 follow-up statement
430 
WGUS72 KMFL 121903
FFSMFL

Flash Flood Statement
National Weather Service Miami FL
303 PM EDT Mon Jul 12 2021

FLC086-121913-
/O.CAN.KMFL.FF.W.0006.000000T0000Z-210712T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Miami-Dade FL-
303 PM EDT Mon Jul 12 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN MIAMI-DADE COUNTY...

The heavy rain has ended. New flooding is no longer expected. Please 
continue to heed remaining road closures.

LAT...LON 2576 8020 2591 8019 2589 8009 2589 8008
      2574 8009

$$

DH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 4:48 AM EDTSpecial Marine WarningMFL57 min
Jul 12, 5:01 AM EDTSpecial Weather StatementMFLBroward44 min
Jul 12, 5:20 AM EDTSpecial Weather StatementMFLBroward25 min
Jul 12, 5:55 AM EDTSpecial Marine WarningMFL37 min
Jul 12, 6:58 AM EDTSpecial Weather StatementMFLMonroe32 min
Jul 12, 7:22 AM EDTSpecial Marine WarningMFL38 min
Jul 12, 7:28 AM EDTSpecial Weather StatementMFLMonroe47 min
Jul 12, 8:40 AM EDTSpecial Marine WarningMFL48 min
Jul 12, 8:46 AM EDTSpecial Weather StatementMFLMiami-Dade44 min
Jul 12, 8:53 AM EDTSpecial Weather StatementMFLMiami-Dade67 min
Jul 12, 9:15 AM EDTSpecial Weather StatementMFLMiami-Dade75 min
Jul 12, 10:36 AM EDTSpecial Marine WarningMFL39 min
Jul 12, 10:40 AM EDTSpecial Weather StatementMFLPalm Beach50 min
Jul 12, 10:59 AM EDTSpecial Weather StatementMFLBroward46 min
Jul 12, 11:09 AM EDTSpecial Marine WarningMFL21 min
Jul 12, 11:11 AM EDTSpecial Marine WarningMFL49 min
Jul 12, 11:14 AM EDTSpecial Weather StatementMFLPalm Beach46 min
Jul 12, 11:20 AM EDTSpecial Weather StatementMFLGlades, Hendry55 min
Jul 12, 11:27 AM EDTSevere Thunderstorm WarningMFLGlades, Hendry, Palm Beach32 min
Jul 12, 11:34 AM EDTSpecial Marine WarningMFL41 min
Jul 12, 11:37 AM EDTSpecial Weather StatementMFLMiami-Dade38 min
Jul 12, 11:38 AM EDTSpecial Weather StatementMFLBroward37 min
Jul 12, 11:44 AM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade46 min
Jul 12, 11:56 AM EDTSpecial Marine WarningMFL19 min
Jul 12, 12:04 PM EDTAreal Flood AdvisoryMFLMiami-Dade30 min
Jul 12, 12:07 PM EDTSpecial Weather StatementMFLGlades53 min
Jul 12, 12:10 PM EDTSpecial Weather StatementMFLBroward65 min
Jul 12, 12:11 PM EDTSpecial Marine WarningMFL49 min
Jul 12, 12:14 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade16 min
Jul 12, 12:18 PM EDTSpecial Weather StatementMFLPalm Beach27 min
Jul 12, 12:19 PM EDTSpecial Marine WarningMFL25 min
Jul 12, 12:23 PM EDTAreal Flood AdvisoryMFLMiami-Dade34 min
Jul 12, 12:31 PM EDTSpecial Marine WarningMFL29 min
Jul 12, 12:49 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade2 hr
Jul 12, 12:53 PM EDTSpecial Marine WarningMFL97 min
Jul 12, 12:57 PM EDTFlash Flood WarningMFLMiami-Dade2 hr
Jul 12, 1:04 PM EDTSpecial Weather StatementMFLBroward56 min
Jul 12, 1:06 PM EDTSpecial Weather StatementMFLMiami-Dade54 min
Jul 12, 1:20 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade16 min
Jul 12, 1:22 PM EDTSpecial Marine WarningMFL38 min
Jul 12, 2:15 PM EDTSpecial Weather StatementMFLPalm Beach45 min
Jul 12, 2:30 PM EDTSevere Thunderstorm WarningMFLPalm Beach45 min
Jul 12, 2:31 PM EDTSpecial Marine WarningMFL44 min
Jul 12, 2:39 PM EDTSpecial Marine WarningMFL66 min
Jul 12, 2:59 PM EDTSpecial Marine WarningMFL61 min
Jul 12, 3:05 PM EDTSevere Thunderstorm WarningMFLPalm Beach40 min
Jul 12, 3:09 PM EDTSpecial Weather StatementMFLPalm Beach51 min
Jul 12, 3:25 PM EDTSpecial Marine WarningMFL35 min
Jul 12, 3:36 PM EDTSevere Thunderstorm WarningMFLPalm Beach14 min
Jul 12, 3:40 PM EDTSpecial Marine WarningMFL20 min
Jul 12, 3:54 PM EDTSpecial Weather StatementMFLGlades51 min
Jul 12, 3:56 PM EDTSpecial Marine WarningMFL33 min
Jul 12, 5:43 PM EDTSpecial Marine WarningMFL47 min
Jul 12, 6:33 PM EDTSpecial Marine WarningMFL57 min
Jul 12, 6:46 PM EDTSpecial Marine WarningMFL29 min
Jul 12, 7:07 PM EDTSpecial Marine WarningMFL68 min
Jul 12, 7:36 PM EDTSpecial Marine WarningMFL39 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.