Alert archive / Florida / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Miami, FL

October 28, 2011Broward County, Palm Beach County, Florida

NWS Miami, FL issued this flash flood warning at Oct 28, 2011, 10:13 PM EDT for Broward County, Palm Beach 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
Oct 28, 2011, 10:13 PM EDT (02:13 UTC)
Expired
Oct 29, 2011, 2:00 AM EDT
In force
4 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

Counties Broward County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 84 km from the middle of the area, began a volume at 02:14 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, 2.2 hours before the alert went out and 58 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 2011-10-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2695 joules per kilogram.LCLEL10008507005003002001001 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 2011-10-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.19395878Sfc1 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
2695 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
512 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
1.1
Supercell composite
8.8

Open this sounding in Storm Lab

The text

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

354 
WGUS52 KMFL 290213
FFWMFL
FLC011-099-290600-
/O.NEW.KMFL.FF.W.0002.111029T0213Z-111029T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1013 PM EDT FRI OCT 28 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN BROWARD COUNTY IN SOUTHEAST FLORIDA...
  SOUTHEASTERN PALM BEACH COUNTY IN SOUTHEAST FLORIDA...

* UNTIL 200 AM EDT

* AT 1008 PM EDT...REPORTS HAVE BEEN RECEIVED OF SIGNIFICANT 
  STREET FLOODING WITH CARS STALLED IN EAST BOCA ALONG NW 2ND
  AVE. ALSO...THERE IS EXTENSIVE FLOODING WITH STALLED CARS
  ALONG ATLANTIC AVE AND CONGRESS IN DELRAY BEACH. DOPPLER
  RADAR INDICATED TORRENTIAL RAINS CONTINUING ACROSS THESE
  AREAS WHICH WILL PRODUCE FLASH FLOODING ACROSS THE AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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 2636 8006 2613 8024 2617 8038 2649 8022
      2648 8005

$$

GREGORIA
4 follow-up statements
549 
WGUS72 KMFL 290225
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1025 PM EDT FRI OCT 28 2011

FLC011-099-290600-
/O.CON.KMFL.FF.W.0002.000000T0000Z-111029T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-PALM BEACH FL-
1025 PM EDT FRI OCT 28 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM EDT FOR
SOUTHEASTERN PALM BEACH AND NORTHEASTERN BROWARD COUNTIES...

AT 1014 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED
AREA...ESPECIALLY IN THE DELRAY BEACH AREA. 

FLOODED ROADS WITH STALLED CARS HAVE BEEN REPORTED BY THE DELRAY
BEACH POLICE DEPARTMENT ALONG THE 440 BLOCK OF SOUTH CONGRESS 
AVENUE...LYNTON ROAD AND CONGRESS AVENUE...THE 600 BLOCK OF
LINDELL BOULEVARD...SOUTHBOUND LANES OF MILITARY TRAIL AND ATLANTIC
AVENUES.

TORRENTIAL RAIN WITH RATES OF 3 INCHES AN HOUR CONTINUES OVER
SOUTHEASTERN PALM BEACH COUNTY. SIGNIFICANT FLOODING WILL CONTINUE...
AND FLOOD WATERS WILL LIKELY BEGIN TO AFFECT STRUCTURES SOON IF
THESE HEAVY RAINS PERSIST MUCH LONGER.

TORRENTIAL RAIN IS OCCURRING INTO BROWARD COUNTY AS WELL...FROM 
PARKLAND AND CORAL SPRINGS TO SUNRISE. THESE AREAS ARE IN THE
FLASH FLOOD WARNING AS WELL...WITH SIGNIFICANT STREET FLOODING
LIKELY.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MISSION
BAY...WHISPER WALK...DELRAY BEACH AND BOCA RATON

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. 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. MOVE TO HIGHER GROUND.

&&

LAT...LON 2636 8006 2613 8024 2617 8038 2649 8022
      2648 8005

$$

GREGORIA
278 
WGUS72 KMFL 290253
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1053 PM EDT FRI OCT 28 2011

FLC011-099-290600-
/O.CON.KMFL.FF.W.0002.000000T0000Z-111029T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-PALM BEACH FL-
1053 PM EDT FRI OCT 28 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM EDT FOR
SOUTHEASTERN PALM BEACH AND NORTHEASTERN BROWARD COUNTIES...

AT 1042 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED
AREA. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MISSION
BAY...WHISPER WALK...DELRAY BEACH...BOCA RATON...PARKLAND...
AND CORAL SPRINGS.

WIDESPREAD STREET FLOODING IS BEING REPORTED FROM DELRAY BEACH
SOUTH TO PARKLAND AND CORAL SPRINGS. EXTENSIVE AND SIGNIFICANT
STREET FLOODING HAS BEEN REPORTED WITH TOO MANY ROADS TO NAME...
ALONG WITH STRANDED VEHICLES. 

TORRENTIAL RAINFALL WITH RATES OF 2 TO 3 INCHES AN HOUR CONTINUE
ACROSS THESE AREAS...WHICH LIKELY WILL LEAD TO DANGEROUS FLOODING
AND STRUCTURAL FLOODING WITH FLOOD WATERS ENTERING HOMES AND
BUSINESSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. MOVE TO HIGHER GROUND.

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. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 2636 8006 2613 8024 2617 8038 2649 8022
      2648 8005

$$

GREGORIA
916 
WGUS72 KMFL 290318
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1118 PM EDT FRI OCT 28 2011

FLC011-099-290600-
/O.CON.KMFL.FF.W.0002.000000T0000Z-111029T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-PALM BEACH FL-
1118 PM EDT FRI OCT 28 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM EDT FOR
SOUTHEASTERN PALM BEACH AND NORTHEASTERN BROWARD COUNTIES...

AT 1105 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MISSION
BAY...WHISPER WALK...DELRAY BEACH...BOCA RATON...PARKLAND...
AND CORAL SPRINGS.

WIDESPREAD STREET FLOODING HAS BEEN REPORTED FROM DELRAY BEACH
SOUTH TO PARKLAND AND CORAL SPRINGS. EXTENSIVE AND SIGNIFICANT
STREET FLOODING HAS BEEN REPORTED WITH TOO MANY ROADS TO NAME...
ALONG WITH STRANDED VEHICLES. 

DRIVING IS NOT RECOMMENDED ACROSS THE WARNED AREA. 

CORAL SPRINGS POLICE DEPARTMENT INDICATED OVER FLOWING CANALS
IN THE SOUTHERN PORTION OF CORAL SPRINGS.

RAIN CONTINUES ACROSS THE WARNED AREA...THOUGH NOT AS HEAVY 
AS RECENT. HOWEVER...ANOTHER AREA OF TORRENTIAL RAIN WILL MOVE 
BACK INTO THE WARNED AREA OVER THE NEXT HOUR. THIS WILL EXACERBATE 
THE FLOODING SITUATION OVER NORTHERN BROWARD AND SOUTHEASTERN PALM
BEACH COUNTIES. DANGEROUS FLOODING OF CANALS AND ROADS
IS EXPECTED TO CONTINUE. STRUCTURAL FLOODING WITH FLOOD 
WATERS ENTERING HOMES AND BUSINESSES IS EXPECTED AS WELL.

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.

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. MOVE TO HIGHER GROUND.

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. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 2636 8006 2613 8024 2617 8038 2649 8022
      2648 8005

$$

GREGORIA
117 
WGUS72 KMFL 290441
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1241 AM EDT SAT OCT 29 2011

FLC011-099-290600-
/O.CON.KMFL.FF.W.0002.000000T0000Z-111029T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-PALM BEACH FL-
1241 AM EDT SAT OCT 29 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM EDT FOR
SOUTHEASTERN PALM BEACH AND NORTHEASTERN BROWARD COUNTIES...

AT 1224 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE HEAVY RAIN HAS MOVED NORTH OF THE WARNED AREA. 
HOWEVER...LIGHT RAIN CONTINUES AND ROADS LIKELY CONTINUE 
FLOODED AS IT WILL TAKE TIME FOR THE WATER TO DRAIN.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MISSION
BAY...WHISPER WALK...DELRAY BEACH...BOCA RATON...PARKLAND...
AND CORAL SPRINGS.

WIDESPREAD STREET FLOODING HAS BEEN REPORTED FROM DELRAY BEACH
SOUTH TO PARKLAND AND CORAL SPRINGS. EXTENSIVE AND SIGNIFICANT
STREET FLOODING HAS BEEN REPORTED WITH TOO MANY ROADS TO NAME...
ALONG WITH STRANDED VEHICLES. 

DRIVING IS NOT RECOMMENDED ACROSS THE WARNED AREA EARLY THIS
MORNING. 

CORAL SPRINGS POLICE DEPARTMENT CONTINUED TO INDICATE OVER FLOWING 
CANALS IN THE SOUTHERN PORTION OF CORAL SPRINGS.

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.

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. MOVE TO HIGHER GROUND.

&&

LAT...LON 2636 8006 2613 8024 2617 8038 2649 8022
      2648 8005

$$

GREGORIA

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 28, 8:30 PM EDTSpecial Weather StatementMFLMonroe60 min
Oct 28, 8:59 PM EDTSpecial Marine WarningMFL61 min
Oct 28, 9:00 PM EDTAreal Flood AdvisoryMFLBroward, Palm Beach2 hr
Oct 28, 9:24 PM EDTSpecial Weather StatementMFLBroward51 min
Oct 28, 9:37 PM EDTSpecial Weather StatementMFLCollier, Miami-Dade, Monroe53 min
Oct 28, 10:12 PM EDTSpecial Weather StatementMFLCollier, Miami-Dade, Monroe63 min
Oct 28, 10:23 PM EDTSpecial Marine WarningMFL97 min
Oct 28, 10:56 PM EDTSpecial Weather StatementMFLBroward34 min
Oct 28, 11:00 PM EDTFlood WatchMFLBroward, Collier, Glades, Hendry, Miami-Dade, Palm Beach29 hr
Oct 28, 11:10 PM EDTSpecial Marine WarningMFL65 min
Oct 28, 11:31 PM EDTSpecial Weather StatementMFLBroward59 min
Oct 28, 11:33 PM EDTFlash Flood WarningMFLPalm Beach3 hr
Oct 28, 11:36 PM EDTSpecial Marine WarningMFL54 min
Oct 28, 11:43 PM EDTSpecial Marine WarningMFL92 min
Oct 29, 12:00 AM EDTAreal Flood AdvisoryMFLCollier5 hr
Oct 29, 12:07 AM EDTSpecial Marine WarningMFL83 min
Oct 29, 1:25 AM EDTSpecial Marine WarningMFL95 min
Oct 29, 1:50 AM EDTAreal Flood WarningMFLBroward, Palm Beach8 hr
Oct 29, 7:58 AM EDTSpecial Weather StatementMFLPalm Beach32 min
Oct 29, 4:45 PM EDTSmall Craft AdvisoryMFL4 days
Oct 29, 4:50 PM EDTAreal Flood AdvisoryMFLBroward115 min
Oct 29, 6:21 PM EDTAreal Flood AdvisoryMFLBroward114 min
Oct 29, 6:47 PM EDTAreal Flood AdvisoryMFLMiami-Dade118 min

Nearby

Flash Flood Warnings in Florida, 2011Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.