Alert archive / Florida / Flash Flood Warnings in 2012

Flash Flood Warning 5, NWS Miami, FL

August 27, 2012Broward County, Palm Beach County, Florida

NWS Miami, FL issued this flash flood warning at Aug 27, 2012, 11:10 AM EDT for Broward County, Palm Beach 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
Aug 27, 2012, 11:10 AM EDT (15:10 UTC)
Expired
Aug 27, 2012, 2:00 PM EDT
In force
3 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), 97 km from the middle of the area, began a volume at 15:09 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
Aug 27, 11:30 AM EDTFLASH FLOODLauderhill, FLMEDIA REPORTS SIGNIFICANT FLOODING ALONG PINE ISLAND ROAD IN LAUDERHILL. ALSO...SOME IMPASSABLE SIDE STREETS ACROSS THE AREA.
Aug 27, 1:15 PM EDTFLASH FLOODThe Acreage, FLPALM BEACH EMERGENCY MANAGER REPORTS WATER NOW ENTERING HOMES AND UP TO MAILBOXES IN THE ACREAGE AND LOXAHATCHEE AREA.

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, 3.2 hours before the alert went out and 71 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 2012-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2762 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 12:00Z on 2012-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 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
2762 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
480 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
165 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, in the capitals the NWS used until 2016.

828 
WGUS52 KMFL 271510
FFWMFL
FLC011-099-271800-
/O.NEW.KMFL.FF.W.0005.120827T1510Z-120827T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1110 AM EDT MON AUG 27 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 200 PM EDT

* AT 1108 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  A BAND OF HEAVY RAIN SETTING UP OVER THE EAST COAST METRO AREAS    
  STREAMING FROM SOUTH TO NORTH. THIS BAND WILL LIKELY CONTINUE TO   
  IMPACT THESE AREAS THROUGH AT LEAST THE EARLY AFTERNOON HOURS.     
  RAINFALL RATES RANGING FROM 1 TO 3 INCHES EVERY TWO HOURS WILL     
  REMAIN POSSIBLE THROUGH THIS TIME. AS OF 1100 AM EDT...IMPACTS     
  CONSIST OF ROAD CLOSURES AS WELL AS CANAL LEVELS APPROACHING       
  MAXIMUM CAPACITY AROUND THE WELLINGTON AREA IN PALM BEACH COUNTY. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE AREAS         
  EXTENDING SOUTH FROM NORTHERN PALM BEACH COUNTY TO THE BROWARD     
  AND MIAMI-DADE COUNTY LINE.

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

A FLOOD WATCH IS ALSO IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR THE
FLOOD WARNING AREA.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI.

LAT...LON 2604 8011 2601 8014 2602 8015 2601 8017
      2600 8046 2696 8056 2696 8015 2698 8014
      2698 8008 2680 8003 2666 8003

$$
1 follow-up statement
597 
WGUS72 KMFL 271542
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1142 AM EDT MON AUG 27 2012

FLC011-099-271800-
/O.CON.KMFL.FF.W.0005.000000T0000Z-120827T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BROWARD FL-PALM BEACH FL-
1142 AM EDT MON AUG 27 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR
CENTRAL PALM BEACH AND EASTERN BROWARD COUNTIES...

AT 1131 AM EDT...THE MEDIA REPORTED SIGNIFICANT FLOODING IN 
LAUDERHILL AND PINE BOULEVARD IN BROWARD COUNTY. IN 
ADDITION...STREET FLOODING IN THE AREAS WITH POOR DRAINAGE HAS ALSO 
BEEN REPORTED IN BROWARD. THE LATEST RADAR TRENDS INDICATED THIS 
PERSISTENT BAND OF HEAVY RAIN SLIGHT SHIFTING WEST AWAY FROM THE 
IMMEDIATE COAST. AS A RESULT...THE WARNING COVERAGE AREA HAS BEEN 
ADJUSTED ACCORDINGLY.   

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NORTH COUNTY
AIRPORT...LOXAHATCHEE NATIONAL WILDLIFE REFUGE...WELLINGTON...ROYAL
PALM BEACH AND LION COUNTRY SAFARI

LAT...LON 2695 8013 2677 8017 2660 8019 2605 8018
      2602 8018 2603 8020 2601 8020 2600 8046
      2696 8056 2696 8015 2698 8014

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 8:16 PM EDTSpecial Weather StatementMFLBroward44 min
Aug 26, 8:38 PM EDTAreal Flood AdvisoryMFLBroward, Palm Beach112 min
Aug 26, 9:07 PM EDTSpecial Weather StatementMFLPalm Beach23 min
Aug 26, 9:10 PM EDTRiver Flood WarningMFLGlades6 days
Aug 26, 9:23 PM EDTTornado WarningMFLPalm Beach22 min
Aug 26, 9:30 PM EDTAreal Flood AdvisoryMFLPalm Beach2 hr
Aug 26, 9:38 PM EDTSpecial Weather StatementMFLPalm Beach37 min
Aug 26, 9:49 PM EDTTornado WarningMFLBroward, Miami-Dade7 min
Aug 26, 10:13 PM EDTSpecial Weather StatementMFLBroward62 min
Aug 26, 10:17 PM EDTSpecial Marine WarningMFL118 min
Aug 26, 10:18 PM EDTSpecial Weather StatementMFLPalm Beach57 min
Aug 26, 10:49 PM EDTFlash Flood WarningMFLPalm Beach3 hr
Aug 26, 11:21 PM EDTSpecial Weather StatementMFLBroward, Palm Beach54 min
Aug 26, 11:40 PM EDTAreal Flood AdvisoryMFLBroward, Palm Beach2 hr
Aug 27, 12:06 AM EDTAreal Flood AdvisoryMFLPalm Beach114 min
Aug 27, 12:13 AM EDTSpecial Marine WarningMFL2 hr
Aug 27, 12:38 AM EDTSpecial Weather StatementMFLPalm Beach52 min
Aug 27, 1:19 AM EDTSpecial Weather StatementMFLPalm Beach56 min
Aug 27, 1:51 AM EDTFlash Flood WarningMFLPalm Beach9 hr
Aug 27, 1:53 AM EDTSpecial Weather StatementMFLGlades, Palm Beach52 min
Aug 27, 2:08 AM EDTSpecial Marine WarningMFL112 min
Aug 27, 2:10 AM EDTAreal Flood AdvisoryMFLPalm Beach110 min
Aug 27, 5:49 AM EDTSmall Craft AdvisoryMFL38 hr
Aug 27, 5:49 AM EDTWind AdvisoryMFLBroward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more15 hr
Aug 27, 6:23 AM EDTRip Current StatementMFLBroward, Collier, Miami-Dade, Palm Beach19 hr
Aug 27, 6:30 AM EDTAreal Flood AdvisoryMFLPalm Beach2 hr
Aug 27, 6:36 AM EDTSpecial Marine WarningMFL24 min
Aug 27, 6:38 AM EDTSpecial Marine WarningMFL2 hr
Aug 27, 8:07 AM EDTSpecial Weather StatementMFLPalm Beach53 min
Aug 27, 8:26 AM EDTAreal Flood AdvisoryMFLGlades, Palm Beach42 min
Aug 27, 8:38 AM EDTSpecial Marine WarningMFL52 min
Aug 27, 9:21 AM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade, Palm Beach114 min
Aug 27, 9:52 AM EDTSpecial Weather StatementMFLBroward23 min
Aug 27, 9:57 AM EDTSpecial Weather StatementMFLBroward18 min
Aug 27, 11:25 AM EDTSpecial Weather StatementMFLBroward, Miami-Dade, Palm Beach65 min
Aug 27, 11:56 AM EDTSpecial Marine WarningMFL2 hr
Aug 27, 12:04 PM EDTGale WarningMFL9 hr
Aug 27, 12:06 PM EDTAreal Flood AdvisoryMFLMiami-Dade114 min
Aug 27, 12:24 PM EDTCoastal Flood StatementMFLCollier13 hr
Aug 27, 1:05 PM EDTSpecial Weather StatementMFLBroward, Miami-Dade, Palm Beach25 min
Aug 27, 1:08 PM EDTSevere Thunderstorm WarningMFLPalm Beach37 min
Aug 27, 1:28 PM EDTSpecial Weather StatementMFLBroward, Palm Beach62 min
Aug 27, 1:40 PM EDTFlash Flood WarningMFLBroward, Palm Beach3 hr
Aug 27, 1:47 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade118 min
Aug 27, 2:14 PM EDTSpecial Marine WarningMFL91 min
Aug 27, 2:32 PM EDTSpecial Weather StatementMFLBroward, Palm Beach58 min
Aug 27, 2:56 PM EDTSevere Thunderstorm WarningMFLPalm Beach12 min
Aug 27, 3:01 PM EDTSpecial Weather StatementMFLCollier29 min
Aug 27, 3:19 PM EDTSpecial Marine WarningMFL116 min
Aug 27, 4:39 PM EDTAreal Flood WarningMFLBroward, Palm Beach6 hr
Aug 27, 5:11 PM EDTSpecial Marine WarningMFL94 min

Nearby

Flash Flood Warnings in Florida, 2012Every flash flood warning in 2012

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.