Alert archive / Florida / Flash Flood Warnings in 2020

Flash Flood Warning 33, NWS Miami, FL

November 9, 2020Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this flash flood warning at Nov 9, 2020, 12:47 AM EST for Broward County, Miami-Dade County, Florida. It was in force for 4 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
Nov 9, 2020, 12:47 AM EST (05:47 UTC)
Expired
Nov 9, 2020, 5:00 AM EST
In force
4 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

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

The radar

The Miami radar (KAMX), 23 km from the middle of the area, began a volume at 05:47 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, 5.8 hours before the alert went out and 4 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 2020-11-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 241 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 00:00Z on 2020-11-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
241 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
516 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

004 
WGUS52 KMFL 090547
FFWMFL
FLC011-086-091000-
/O.NEW.KMFL.FF.W.0033.201109T0547Z-201109T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Miami FL
1247 AM EST Mon Nov 9 2020

The National Weather Service in Miami has issued a

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

* Until 500 AM EST.

* At 1247 AM EST, Doppler radar indicated another heavy rain band is 
  developing over Northern Miami-Dade and over Southern Miami-Dade 
  County. Rainfall amounts of 3 and 6 inches have falle from the 
  earlier rain bands. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Miami, Hialeah, Hollywood, Miramar, Miami Beach, Homestead, Coral 
  Gables, Key Biscayne, South Miami, Surfside, Kendall, Black Point, 
  Virginia Key, The Redland, Homestead Miami Speedway, Miami 
  Gardens, Turkey Point, Hallandale, North Miami and Doral.

Additional rainfall amounts of 3 to 5 inches are possible in the 
warned area with these rain bands that are developing over 
Miami-Dade county.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

Please report flooding to your local law enforcement agency when you 
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 2598 8043 2599 8043 2599 8012 2599 8006
      2598 8006 2536 8021 2536 8024 2540 8056

FLASH FLOOD...RADAR INDICATED

$$

BAXTER
2 follow-up statements
389 
WGUS72 KMFL 090637
FFSMFL

Flash Flood Statement
National Weather Service Miami FL
137 AM EST Mon Nov 9 2020

FLC011-086-091000-
/O.CON.KMFL.FF.W.0033.000000T0000Z-201109T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Broward FL-Miami-Dade FL-
137 AM EST Mon Nov 9 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 AM EST EARLY THIS 
MORNING FOR SOUTHERN BROWARD AND NORTHERN MIAMI-DADE COUNTIES...

At 137 AM EST, Doppler radar continue to indicate a heavy rain band 
moving slowly northward over Northern Miami-Dade County where 1 to 2 
inches of rainfall has fallen during the last hour, which it turn 
allowed for the rainfall total to increased to 3 and 6 inches from 
the earlier heavy rain bands. Flash flooding is ongoing or expected 
to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Miami, Hialeah, Hollywood, Miramar, Miami Beach, Homestead, Coral 
  Gables, Key Biscayne, South Miami, Surfside, Kendall, Black Point, 
  Virginia Key, The Redland, Homestead Miami Speedway, Miami 
  Gardens, Turkey Point, Hallandale, North Miami and Doral.

Additional rainfall amounts of 3 to 5 inches are possible in the 
warned area with this slow north moving heavy rain band.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

Please report flooding to your local law enforcement agency when you 
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 2598 8043 2599 8043 2599 8012 2599 8006
      2598 8006 2536 8021 2536 8024 2540 8056

FLASH FLOOD...RADAR INDICATED

$$

BAXTER
413 
WGUS72 KMFL 090920
FFSMFL

Flash Flood Statement
National Weather Service Miami FL
420 AM EST Mon Nov 9 2020

FLC011-086-091000-
/O.CON.KMFL.FF.W.0033.000000T0000Z-201109T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Broward FL-Miami-Dade FL-
420 AM EST Mon Nov 9 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 AM EST EARLY THIS 
MORNING FOR SOUTHERN BROWARD AND NORTHERN MIAMI-DADE COUNTIES...

At 420 AM EST, Doppler radar indicated another band of heavy rains 
developing over the Atlantic waters of South Florida moving west 
northwest towards Miami-Dade County. As this band of heavy rains 
moves into the region addtional rainfall amounts of 2 to 4 inches 
are possible on the already 3 to 6 inches that has fallen from 
previous heavy rains overnight. Flash flooding is ongoing or 
expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Miami, Hialeah, Hollywood, Miramar, Miami Beach, Homestead, Coral 
  Gables, Key Biscayne, South Miami, Surfside, Kendall, Black Point, 
  Virginia Key, The Redland, Homestead Miami Speedway, Miami 
  Gardens, Turkey Point, Hallandale, North Miami and Doral.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

Please report flooding to your local law enforcement agency when you 
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 2598 8043 2599 8043 2599 8012 2599 8006
      2598 8006 2536 8021 2536 8024 2540 8056

FLASH FLOOD...RADAR INDICATED

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 8, 7:37 PM ESTSpecial Marine WarningMFL53 min
Nov 8, 7:44 PM ESTFlash Flood WarningMFLBroward, Palm Beach9 hr
Nov 8, 7:59 PM ESTSpecial Marine WarningMFL91 min
Nov 8, 8:47 PM ESTSpecial Weather StatementMFLBroward43 min
Nov 8, 9:35 PM ESTSpecial Marine WarningMFL85 min
Nov 8, 10:08 PM ESTFlash Flood WarningMFLMiami-Dade4 hr
Nov 8, 10:48 PM ESTAreal Flood WarningMFLPalm Beach16 min
Nov 8, 10:59 PM ESTSpecial Weather StatementMFLBroward46 min
Nov 8, 11:01 PM ESTSpecial Marine WarningMFL89 min
Nov 8, 11:04 PM ESTFlash Flood WarningMFLPalm Beach3 hr
Nov 8, 11:56 PM ESTSpecial Marine WarningMFL2 hr
Nov 9, 12:05 AM ESTSpecial Marine WarningMFL85 min
Nov 9, 12:14 AM ESTSpecial Weather StatementMFLPalm Beach46 min
Nov 9, 1:00 AM ESTSpecial Weather StatementMFLPalm Beach45 min
Nov 9, 1:15 AM ESTSpecial Weather StatementMFLMiami-Dade30 min
Nov 9, 1:31 AM ESTAreal Flood AdvisoryMFLPalm Beach3 hr
Nov 9, 2:34 AM ESTSpecial Weather StatementMFLBroward41 min
Nov 9, 2:53 AM ESTSpecial Weather StatementMFLPalm Beach52 min
Nov 9, 3:24 AM ESTSpecial Weather StatementMFLPalm Beach51 min
Nov 9, 3:41 AM ESTAreal Flood AdvisoryMFLCollier, Hendry7 hr
Nov 9, 3:44 AM ESTSpecial Marine WarningMFL91 min
Nov 9, 4:02 AM ESTFlash Flood WarningMFLPalm Beach3 hr
Nov 9, 4:20 AM ESTSpecial Weather StatementMFLPalm Beach40 min
Nov 9, 4:42 AM ESTFlash Flood WarningMFLBroward, Miami-Dade10 hr
Nov 9, 4:46 AM ESTSpecial Weather StatementMFLMonroe44 min
Nov 9, 5:18 AM ESTFlash Flood Warning Considerable damage threatMFLBroward, Miami-Dade3 hr
Nov 9, 5:58 AM ESTSpecial Weather StatementMFLCollier47 min
Nov 9, 6:01 AM ESTSpecial Marine WarningMFL119 min
Nov 9, 6:46 AM ESTAreal Flood WarningMFLPalm Beach3 hr
Nov 9, 9:11 AM ESTSpecial Weather StatementMFLBroward49 min
Nov 9, 9:14 AM ESTSpecial Weather StatementMFLMonroe46 min
Nov 9, 9:53 AM ESTSmall Craft AdvisoryMFL69 hr
Nov 9, 9:57 AM ESTSpecial Weather StatementMFLCollier, Hendry, Monroe93 min
Nov 9, 10:07 AM ESTHigh Surf AdvisoryMFLPalm Beach15 hr
Nov 9, 10:46 AM ESTAreal Flood AdvisoryMFLCollier, Hendry3 hr
Nov 9, 10:57 AM ESTSpecial Marine WarningMFL32 min
Nov 9, 11:27 AM ESTSpecial Weather StatementMFLCollier93 min
Nov 9, 2:46 PM ESTAreal Flood WarningMFLBroward, Miami-Dade, Palm Beach16 hr
Nov 9, 5:37 PM ESTSpecial Weather StatementMFLHendry38 min

Nearby

Flash Flood Warnings in Florida, 2020Every flash flood warning in 2020

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.