Alert archive / Florida / Flash Flood Warnings in 2011

Flash Flood Warning 6, NWS Miami, FL

October 31, 2011Broward County, Florida

NWS Miami, FL issued this flash flood warning at Oct 31, 2011, 1:27 AM EDT for Broward County, Florida. It was in force for 3 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 31, 2011, 1:27 AM EDT (05:27 UTC)
Expired
Oct 31, 2011, 4:30 AM EDT
In force
3 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

County Broward County, FL

What was reported inside it

TimeReportWhereRemark
Oct 31, 3:28 AM EDTFLOODFort Lauderdale, FLBROWARD COUNTY EMERGENCY MANAGEMENT OFFICE REPORTS NUMEROUS FLOODED HOMES AND BUSINESSES IN THE CITY OF FORT LAUDERDALE. THEY ARE OPENING UP SHELTERS.
Oct 31, 3:28 AM EDTHEAVY RAIN 6.11Oakland Park, FLA SOUTH FLORIDA WATER MANAGEMENT RAIN GUAGE RECORDED 6.11 INCHES OF RAIN IN OAKLAND PARK. ALTHOUGH THIS TOTAL IS SINCE 7 AM SUNDAY, MOST OF THIS RAIN OCCURRED IN THE PAST TWO HOURS.

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, 5.5 hours before the alert went out and 39 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 2011-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 860 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2011-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
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.

310 
WGUS52 KMFL 310527
FFWMFL
FLC011-310830-
/O.NEW.KMFL.FF.W.0006.111031T0527Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
127 AM EDT MON OCT 31 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL BROWARD COUNTY IN SOUTHEAST FLORIDA...

* UNTIL 430 AM EDT

* AT 124 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH TORRENTIAL RAINFALL FOCUSED FROM
  DAVIE TO DOWNTOWN FORT LAUDERDALE TO OAKLAND PARK. RAINFALL RATES
  OF JUST OVER 4 INCHES PER HOUR HAVE BEEN OBSERVED. 3 TO 6 INCHES
  OF RAIN IS POSSIBLE ACROSS THIS AREA WHICH WILL LEAD TO FLASH
  FLOODING. SOME ROADS ARE EXPECTED TO BECOME IMPASSABLE. FLOOD
  WATERS COULD ENTER HOMES OR BUSINESSES.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FORT
  LAUDERDALE...DANIA BEACH...LAUDERDALE BY THE SEA...LAUDERDALE
  LAKES...LAUDERHILL...OAKLAND PARK...PORT EVERGLADES AND WILTON
  MANORS.

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 2615 8010 2614 8009 2613 8010 2610 8010
      2609 8010 2606 8011 2607 8024 2621 8019
      2620 8009 2617 8009

$$

GREGORIA
3 follow-up statements
629 
WGUS72 KMFL 310651
FFSMFL

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

FLC011-310830-
/O.CON.KMFL.FF.W.0006.000000T0000Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-
251 AM EDT MON OCT 31 2011

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

AT 246 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN ACROSS THE AREA. TORRENTIAL RAIN WITH RATES OF 
AROUND 4 INCHES PER HOUR WAS OCCURRING OVER OAKLAND PARK AND WILTON
MANORS. 5.25 INCHES OF RAIN HAS BEEN RECORDED ON THE NORTHWEST SIDE
OF DOWNTOWN FORT LAUDERDALE. SOME ROADS ARE LIKELY IMPASSABLE. FLOOD 
WATERS COULD ENTER HOMES OR BUSINESSES.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FORT
LAUDERDALE...OAKLAND PARK...LAUDERDALE BY
THE SEA...WILTON MANORS...AND LAUDERDALE LAKES

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 2615 8010 2614 8009 2613 8010 2610 8010
      2609 8010 2606 8011 2607 8024 2621 8019
      2620 8009 2617 8009

$$

GREGORIA
270 
WGUS72 KMFL 310735
FFSMFL

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

FLC011-310830-
/O.CON.KMFL.FF.W.0006.000000T0000Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-
335 AM EDT MON OCT 31 2011

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

AT 324 AM EDT...BROWARD COUNTY EMERGENCY MANAGEMENT HAS RECEIVED
NUMEROUS REPORTS OF FLOODING OF HOMES AND BUSINESSES IN THE CITY OF 
FORT LAUDERDALE. THEY ARE OPENING SHELTERS. NATIONAL WEATHER SERVICE 
DOPPLER RADAR SHOWED THAT THE HEAVIEST RAIN WAS GRADUALLY SHIFTING
OFF THE COAST. HOWEVER...MODERATE TO LOCALIZED HEAVY RAIN CONTINUES
ALONG AND EAST OF INTERSTATE 95. ANY ADDITIONAL RAINFALL WILL ONLY
EXACERBATE THE ONGOING FLOODING.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FORT
LAUDERDALE...OAKLAND PARK...LAUDERDALE BY
THE SEA...WILTON MANORS...AND LAUDERDALE LAKES

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 2615 8010 2614 8009 2613 8010 2610 8010
      2609 8010 2606 8011 2607 8024 2621 8019
      2620 8009 2617 8009

$$

GREGORIA
015 
WGUS72 KMFL 310747 CCA
FFSMFL

FLASH FLOOD STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE MIAMI FL
346 AM EDT MON OCT 31 2011

FLC011-310900-
/O.COR.KMFL.FF.W.0006.000000T0000Z-111031T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-
346 AM EDT MON OCT 31 2011

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

AT 324 AM EDT...BROWARD COUNTY EMERGENCY MANAGEMENT HAS RECEIVED
NUMEROUS REPORTS OF FLOODING OF HOMES AND BUSINESSES IN THE CITY OF 
FORT LAUDERDALE. NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
THAT THE HEAVIEST RAIN WAS GRADUALLY SHIFTING OFF THE COAST.
HOWEVER...MODERATE TO LOCALIZED HEAVY RAIN CONTINUES ALONG AND
EAST OF INTERSTATE 95. ANY ADDITIONAL RAINFALL WILL ONLY
EXACERBATE THE ONGOING FLOODING.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FORT
LAUDERDALE...OAKLAND PARK...LAUDERDALE BY
THE SEA...WILTON MANORS...AND LAUDERDALE LAKES

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 2615 8010 2614 8009 2613 8010 2610 8010
      2609 8010 2606 8011 2607 8024 2621 8019
      2620 8009 2617 8009

$$

GREGORIA

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 30, 8:02 PM EDTSpecial Marine WarningMFL43 min
Oct 30, 8:13 PM EDTSpecial Weather StatementMFLMiami-Dade47 min
Oct 30, 8:14 PM EDTFlash Flood WarningMFLMiami-Dade3 hr
Oct 30, 8:26 PM EDTTornado WarningMFLMiami-Dade34 min
Oct 30, 8:44 PM EDTSpecial Marine WarningMFL46 min
Oct 30, 8:55 PM EDTTornado WarningMFLMiami-Dade23 min
Oct 30, 9:31 PM EDTSpecial Marine WarningMFL44 min
Oct 30, 10:12 PM EDTAreal Flood AdvisoryMFLBroward2 hr
Oct 30, 10:31 PM EDTFlash Flood WarningMFLMiami-Dade6 hr
Oct 31, 12:07 AM EDTAreal Flood AdvisoryMFLBroward4 hr
Oct 31, 1:47 AM EDTSpecial Marine WarningMFL58 min
Oct 31, 2:26 AM EDTFlash Flood WarningMFLBroward3 hr
Oct 31, 4:21 AM EDTFlash Flood WarningMFLMiami-Dade5 hr
Oct 31, 4:29 AM EDTRip Current StatementMFLBroward, Miami-Dade, Palm Beach4 days
Oct 31, 4:31 AM EDTFlash Flood WarningMFLBroward5 hr
Oct 31, 8:32 AM EDTSpecial Marine WarningMFL28 min
Oct 31, 8:59 AM EDTAreal Flood WarningMFLMiami-Dade3 hr
Oct 31, 9:06 AM EDTAreal Flood WarningMFLBroward3 hr
Oct 31, 12:01 PM EDTFlash Flood WarningMFLMiami-Dade5 hr
Oct 31, 12:16 PM EDTFlash Flood WarningMFLBroward6 hr
Oct 31, 1:35 PM EDTSpecial Weather StatementMFLBroward40 min
Oct 31, 2:08 PM EDTSpecial Weather StatementMFLBroward52 min
Oct 31, 2:54 PM EDTAreal Flood AdvisoryMFLBroward111 min
Oct 31, 4:55 PM EDTFlash Flood WarningMFLMiami-Dade4 hr
Oct 31, 5:50 PM EDTAreal Flood WarningMFLBroward18 hr
Oct 31, 6:48 PM EDTAreal Flood WarningMFLMiami-Dade18 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.