Alert archive / Florida / Flash Flood Warnings in 2011

Flash Flood Warning 5, NWS Miami, FL

October 30, 2011Miami-Dade County, Florida

NWS Miami, FL issued this flash flood warning at Oct 30, 2011, 10:31 PM EDT for Miami-Dade County, Florida. It was in force for 6 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: Oct 30, 2011, 10:31 PM EDT (02:31 UTC)
Expired: Oct 31, 2011, 4:30 AM EDT
In force: 6 hr
Issued by: NWS Miami, FL
Area: Storm-based polygon
Flood severity: None

County Miami-Dade County, FL

What was reported inside it

Time	Report	Where	Remark
Oct 30, 11:16 PM EDT	COASTAL FLOOD	Cutler Ridge, FL	A PRIVATE CITIZEN CALLED FROM OLD CUTLER BAY AND INDICATED ABOUT 18 INCES TO NEAR TWO FEET OF STANDING WATER.
Oct 30, 11:33 PM EDT	FLASH FLOOD	Coral Gables, FL	A HAM RADIO OPERATOR CALLED IN A REPORT OF AN INCIDENT IN CORAL GABLES, IN THE COCOPLUM CIRCLE AREA, NEAR THE INTERSECTION OF SUNSET ROAD AND OLD CUTLER ROAD. HE REPORTED THAT A FIRE TRUCK WENT INTO THAT AREA, AND THEN HAD TO BE TOWED OUT BY A TOW TRUCK DUE TO

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, 2.5 hours before the alert went out and 14 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 860 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

541 
WGUS52 KMFL 310231
FFWMFL
FLC086-310830-
/O.NEW.KMFL.FF.W.0005.111031T0231Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1031 PM EDT SUN OCT 30 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL MIAMI-DADE COUNTY IN SOUTHEAST FLORIDA...

* UNTIL 430 AM EDT MONDAY

* AT 1024 PM EDT...REPORTS CONTINUE TO BE RECEIVED OF EXTENSIVE
  STREET FLOODING FROM CUTLER RIDGE TO THE CORAL GABLES AREA.
  SPOTTERS REPORTED FLOOD WATERS NOW ENTERING GARAGES IN THE 
  CORAL GABLES AREA. TORRENTIAL RAIN WAS DEVELOPING AGAIN AND
  BECOMING FOCUSED FROM CORAL GABLES TO DOWNTOWN MIAMI. THIS
  HEAVY RAIN WILL MOVE SLOWLY NORTH INTO THE MIAMI BEACH AREA.
  RAINFALL RATES OF UP TO 4 INCHES PER HOUR CAN BE EXPECTED. THIS
  WILL EXACERBATE THE FLOODING SITUATION. ADDITIONAL STREETS ARE 
  EXPECTED TO BECOME IMPASSABLE FROM CORAL GABLES TO MIAMI TO
  MIAMI BEACH...ALONG WITH SOME STRUCTURAL FLOODING DUE TO THE
  SATURATED GROUNDS AND HIGH WATER LEVELS IN CANALS AND LOW LYING
  AREAS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CORAL
  GABLES...KENDALL...KEY BISCAYNE...MIAMI...MIAMI BEACH...SOUTH
  MIAMI...COCONUT GROVE...CUTLER BAY...CUTLER RIDGE...ORANGE BOWL...
  PALMETTO BAY...PERRINE...PINECREST...UNIVERSITY OF MIAMI AND WEST
  PERRINE.



PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 2578 8012 2567 8015 2566 8016 2568 8018
      2574 8017 2572 8024 2564 8026 2561 8030
      2553 8031 2555 8040 2576 8032 2585 8017
      2576 8018 2575 8016 2583 8014 2586 8015
      2588 8012

$$

GREGORIA

3 follow-up statements

921 
WGUS72 KMFL 310329
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1129 PM EDT SUN OCT 30 2011

FLC086-310830-
/O.CON.KMFL.FF.W.0005.000000T0000Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIAMI-DADE FL-
1129 PM EDT SUN OCT 30 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR EAST
CENTRAL MIAMI-DADE COUNTY...

AT 1126 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE TORRENTIAL AND BLINDING RAINS AFFECTING THE CORAL GABLES 
AND COCONUT GROVE AREAS...WITH RAINFALL RATES LIKELY AROUND 4 INCHES 
PER HOUR. THE CORAL GABLES POLICE DEPARTMENT HAS REPORTED EXTENSIVE 
ROAD FLOODING WITH STALLED VEHICLES AND IMPASSABLE STREETS. DUE TO 
THE EXTREME RAINFALL RATES NOW OCCURRING...FLOODING IN THE GABLES 
AND GROVE AREAS IS LIKELY BECOMING MORE EXTENSIVE. DRIVING IS NOT 
RECOMMENDED ACROSS THESE AREAS. SOME STRUCTURAL FLOODING IS EXPECTED 
DUE TO THESE INTENSE RAINS ON SATURATED SOILS ALONG WITH HIGH CANAL 
LEVELS. STREET FLOODING ALSO CONTINUES FROM CUTLER BAY TO MIAMI 
BEACH.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CUTLER 
BAY...CUTLER RIDGE...PERRINE...COCONUT GROVE...MIAMI 
BEACH...MIAMI...SOUTH MIAMI...AND CORAL GABLES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. WITH FLOODED ROADWAYS AND THE NUMEROUS CANALS 
ACROSS SOUTH FLORIDA...IT CAN BE DIFFICULT TO DETERMINE WHERE THE 
ROAD ENDS AND WHERE THE CANAL BEGINS.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY 
DEEPER THAN THEY APPEAR. WHEN ENCOUNTERING FLOODED ROADS MAKE THE 
SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 2578 8012 2567 8015 2566 8016 2568 8018
      2574 8017 2572 8024 2564 8026 2561 8030
      2553 8031 2555 8040 2576 8032 2585 8017
      2576 8018 2575 8016 2583 8014 2586 8015
      2588 8012

$$

GREGORIA

394 
WGUS72 KMFL 310420
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1220 AM EDT MON OCT 31 2011

FLC086-310830-
/O.CON.KMFL.FF.W.0005.000000T0000Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIAMI-DADE FL-
1220 AM EDT MON OCT 31 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR EAST
CENTRAL MIAMI-DADE COUNTY...

AT 1211 AM EDT...A STORM SPOTTER REPORTED THAT ALL STREETS EAST OF 
LENOX AVENUE BETWEEN 9TH AND 14TH STREET IS FLOODED. LAW ENFORCEMENT 
OFFICIALS HAVE REPORTED EXTENSIVE STREET FLOODING WITH STALLED 
VEHICLES AND IMPASSABLE STREETS IN THE CORAL GABLES AREA. FLASH 
FLOODING WILL CONTINUE ACROSS THE WARNED AREA. TORRENTIAL RAINFALL 
WITH RATES OF 2 TO 4 INCHES PER HOUR WILL OCCUR FROM COCONUT GROVE 
TO DOWNTOWN MIAMI TO SOUTH BEACH. THIS WILL EXACERBATE THE FLOODING 
SITUATION...LEADING TO VERY DANGEROUS DRIVING CONDITIONS. DRIVING IS 
NOT RECOMMENDED ACROSS THESE AREAS. FLOODING OF SOME HOMES AND 
BUSINESSES IS LIKELY.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CUTLER 
BAY...CUTLER RIDGE...PERRINE...COCONUT GROVE...MIAMI 
BEACH...MIAMI...SOUTH MIAMI...AND CORAL GABLES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. WITH FLOODED ROADWAYS AND THE NUMEROUS CANALS 
ACROSS SOUTH FLORIDA...IT CAN BE DIFFICULT TO DETERMINE WHERE THE 
ROAD ENDS AND WHERE THE CANAL BEGINS.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY 
DEEPER THAN THEY APPEAR. WHEN ENCOUNTERING FLOODED ROADS MAKE THE 
SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 2578 8012 2567 8015 2566 8016 2568 8018
      2574 8017 2572 8024 2564 8026 2561 8030
      2553 8031 2555 8040 2576 8032 2585 8017
      2576 8018 2575 8016 2583 8014 2586 8015
      2588 8012

$$

GREGORIA

159 
WGUS72 KMFL 310714
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
314 AM EDT MON OCT 31 2011

FLC086-310830-
/O.CON.KMFL.FF.W.0005.000000T0000Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIAMI-DADE FL-
314 AM EDT MON OCT 31 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR EAST
CENTRAL MIAMI-DADE COUNTY...

AT 305 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
MODERATE TO HEAVY RAIN OCCURRING FROM DOWNTOWN MIAMI TO MIAMI BEACH.
ALTHOUGH NO ADDITIONAL REPORTS HAVE BEEN RECEIVED...STREETS LIKELY
CONTINUE FLOODED ACROSS PORTIONS OF THE AREA ALONG WITH SOME 
IMPASSABLE. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CUTLER 
BAY...CUTLER RIDGE...PERRINE...COCONUT GROVE...MIAMI 
BEACH...MIAMI...SOUTH MIAMI...AND CORAL GABLES

SOME ROADS ARE LIKELY IMPASSABLE. FLOOD WATERS COULD ENTER HOMES OR 
BUSINESSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. WITH FLOODED ROADWAYS AND THE NUMEROUS CANALS 
ACROSS SOUTH FLORIDA...IT CAN BE DIFFICULT TO DETERMINE WHERE THE 
ROAD ENDS AND WHERE THE CANAL BEGINS.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY 
DEEPER THAN THEY APPEAR. WHEN ENCOUNTERING FLOODED ROADS MAKE THE 
SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 2578 8012 2567 8015 2566 8016 2568 8018
      2574 8017 2572 8024 2564 8026 2561 8030
      2553 8031 2555 8040 2576 8032 2585 8017
      2576 8018 2575 8016 2583 8014 2586 8015
      2588 8012

$$

GREGORIA

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 30, 8:02 PM EDT	Special Marine Warning	MFL		43 min
Oct 30, 8:13 PM EDT	Special Weather Statement	MFL	Miami-Dade	47 min
Oct 30, 8:14 PM EDT	Flash Flood Warning	MFL	Miami-Dade	3 hr
Oct 30, 8:26 PM EDT	Tornado Warning	MFL	Miami-Dade	34 min
Oct 30, 8:44 PM EDT	Special Marine Warning	MFL		46 min
Oct 30, 8:55 PM EDT	Tornado Warning	MFL	Miami-Dade	23 min
Oct 30, 9:31 PM EDT	Special Marine Warning	MFL		44 min
Oct 30, 10:12 PM EDT	Areal Flood Advisory	MFL	Broward	2 hr
Oct 31, 12:07 AM EDT	Areal Flood Advisory	MFL	Broward	4 hr
Oct 31, 1:27 AM EDT	Flash Flood Warning	MFL	Broward	3 hr
Oct 31, 1:47 AM EDT	Special Marine Warning	MFL		58 min
Oct 31, 2:26 AM EDT	Flash Flood Warning	MFL	Broward	3 hr
Oct 31, 4:21 AM EDT	Flash Flood Warning	MFL	Miami-Dade	5 hr
Oct 31, 4:29 AM EDT	Rip Current Statement	MFL	Broward, Miami-Dade, Palm Beach	4 days
Oct 31, 4:31 AM EDT	Flash Flood Warning	MFL	Broward	5 hr
Oct 31, 8:32 AM EDT	Special Marine Warning	MFL		28 min
Oct 31, 8:59 AM EDT	Areal Flood Warning	MFL	Miami-Dade	3 hr
Oct 31, 9:06 AM EDT	Areal Flood Warning	MFL	Broward	3 hr
Oct 31, 12:01 PM EDT	Flash Flood Warning	MFL	Miami-Dade	5 hr
Oct 31, 12:16 PM EDT	Flash Flood Warning	MFL	Broward	6 hr
Oct 31, 1:35 PM EDT	Special Weather Statement	MFL	Broward	40 min
Oct 31, 2:08 PM EDT	Special Weather Statement	MFL	Broward	52 min
Oct 31, 2:54 PM EDT	Areal Flood Advisory	MFL	Broward	111 min
Oct 31, 4:55 PM EDT	Flash Flood Warning	MFL	Miami-Dade	4 hr
Oct 31, 5:50 PM EDT	Areal Flood Warning	MFL	Broward	18 hr
Oct 31, 6:48 PM EDT	Areal Flood Warning	MFL	Miami-Dade	18 hr

Nearby

Flash Flood Warnings in Florida, 2011 Every flash flood warning in 2011

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.