Alert archive / Florida / Flash Flood Warnings in 2011

Flash Flood Warning 10, NWS Miami, FL

October 31, 2011Miami-Dade County, Florida

NWS Miami, FL issued this flash flood warning at Oct 31, 2011, 12:01 PM EDT for Miami-Dade County, Florida. It was in force for 5 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 31, 2011, 12:01 PM EDT (16:01 UTC)
Expired
Oct 31, 2011, 5:00 PM EDT
In force
5 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

County Miami-Dade County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 4.0 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-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2011-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 684 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 12:00Z on 2011-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
684 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

319 
WGUS52 KMFL 311601
FFWMFL
FLC086-312100-
/O.NEW.KMFL.FF.W.0010.111031T1601Z-111031T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1201 PM EDT MON OCT 31 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 500 PM EDT

* AT 1156 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
  AN AREA OF SHOWERS AND THUNDERSTORMS OVER THE FLORIDA KEYS AND 
  FLORIDA BAY MOVING NORTH AT 15 MPH WHICH WILL MOVE INTO MIAMI-DADE 
  COUNTY DURING THE EARLY AFTERNOON HOURS. LOCAL LAW ENFORCEMENT 
  OFFICIALS AND MEDIA INDICATE THAT FLOODING PERSISTS OVER LARGE
  PARTS OF EASTERN AND SOUTHERN MIAMI-DADE COUNTY, ESPECIALLY IN 
  CORAL GABLES, COCONUT GROVE, MIAMI BEACH, CITY OF MIAMI, PINECREST 
  AND PALMETTO BAY. ADDITIONAL 1 TO 3 INCHES OF RAIN WITH POTENTIAL 
  ISOLATED AMOUNTS UP TO 5 INCHES WILL LIKELY OCCUR OVER PARTS OF 
  THIS AREA DURING THE AFTERNOON, AGGRAVATING FLOODING CONDITIONS 
  OVER THIS AREA. 

* 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...PALMETTO BAY...PERRINE... 
  PINECREST AND UNIVERSITY OF MIAMI.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF 
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 2567 8015 2566 8016 2568 8018 2574 8017
      2572 8024 2564 8026 2561 8030 2554 8031
      2555 8040 2574 8030 2584 8017 2576 8018
      2575 8016 2584 8014 2586 8015 2588 8012

$$

MOLLEDA
1 follow-up statement
925 
WGUS72 KMFL 311840
FFSMFL

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
240 PM EDT MON OCT 31 2011

FLC086-312100-
/O.CON.KMFL.FF.W.0010.000000T0000Z-111031T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIAMI-DADE FL-
240 PM EDT MON OCT 31 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR EAST
CENTRAL MIAMI-DADE COUNTY...

THIS INCLUDES AREAS FROM NORTH MIAMI BEACH SOUTH TO CUTLER RIDGE 
ALONG AND EAST OF HIGHWAY 1 AND I-95. 

STANDING WATERS FROM RECENT RAINS STILL POSE A THREAT FOR AREAS 
WITHIN THE WARNED REGION. ADDITIONALLY, AT 230 PM EDT...NATIONAL 
WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STORMS FROM 23 
MILES NORTHWEST OF FLAMINGO TO 30 MILES OR SO WEST OF MIAMI...MOVING 
EAST AROUND 15 MPH. THIS ACTIVITY COULD AFFECT THE WARNED AREA LATER 
THIS AFTERNOON AGGRAVATING ANY EXISTING FLOODING SITUATION. 
THEREFORE THE WARNING REMAINS IN EFFECT.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH 
MIAMI...UNIVERSITY OF MIAMI...KENDALL...CORAL GABLES...PINECREST...
COCONUT GROVE...CUTLER RIDGE...ORANGE BOWL...MIAMI...PALMETTO BAY...
PERRINE...CUTLER BAY...MIAMI BEACH AND KEY BISCAYNE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL COULD CAUSE FLOODING OF CANALS...
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. MOVE TO HIGHER GROUND.

&&

LAT...LON 2567 8015 2566 8016 2568 8018 2574 8017
      2572 8024 2564 8026 2561 8030 2554 8031
      2555 8040 2574 8030 2584 8017 2576 8018
      2575 8016 2584 8014 2586 8015 2588 8012

$$

PS

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, 1:27 AM EDTFlash Flood WarningMFLBroward3 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, 12:16 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; the sounding from the Mesonet's radiosonde archive.