Alert archive / Florida / Flash Flood Warnings in 2008

Flash Flood Warning 9, NWS Melbourne, FL

August 20, 2008Indian River County, Florida

NWS Melbourne, FL issued this flash flood warning at Aug 20, 2008, 5:08 PM EDT for Indian River County, Florida. It was in force for 3 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
Aug 20, 2008, 5:08 PM EDT (21:08 UTC)
Expired
Aug 20, 2008, 8:00 PM EDT
In force
3 hr
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Flood severity
None

County Indian River County, FL

The radar

The Melbourne radar (KMLB), 45 km from the middle of the area, began a volume at 21:07 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.1 hours before the alert went out and 84 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, Cape Canaveral, FL at 12:00Z on 2008-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2008-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
900 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
22 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.

000 
WGUS52 KMLB 202108
FFWMLB
FLC061-210000-
/O.NEW.KMLB.FF.W.0009.080820T2108Z-080821T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
508 PM EDT WED AUG 20 2008

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  INDIAN RIVER COUNTY IN EAST CENTRAL FLORIDA...
  THIS INCLUDES THE CITIES OF...SEBASTIAN...ROSELAND...WABASSO
  ...ORCHID...FELLSMERE...BLUE CYPRESS LAKE...

* UNTIL 800 PM EDT

* AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  RAIN BANDS ON THE SOUTH SIDE OF TROPICAL STORM FAY CONTINUING TO
  MOVE ACROSS INDIAN RIVER COUNTY. SIGNIFICANT RAINFALL ACCUMULATIONS
  HAVE ALREADY OCCURRED. AN UNOFFICIAL PUBLIC REPORT OF 18.50 INCHES
  OF RAINFALL WAS RECEIVED FROM THE SEBASTIAN AREA. 

SEVERAL ROAD CLOSURES HAVE BEEN REPORTS BY THE INDIAN RIVER COUNTY
EMERGENCY MANAGEMENT OFFICE...INCLUDING...BUT NOT LIMITED TO...

...BLUE CYPRESS ROAD NORTH OF STATE ROAD 60...
...OLD DIXIE HIGHWAY BETWEEN 11TH STREET SW AND 13TH STREET SW...
...MULBERRY STREET EAST OF ROSELAND ROAD AND NORTH OF HIGHWAY 512...

IN ADDITION...SEVERAL INTERSECTIONS ARE FLOODED AND HAVE LANE 
CLOSURES.

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH THIS EVENING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT 
ATTEMPT TO CROSS WATER OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND INTERSECTIONS. ADDITIONALLY... 
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND 
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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.

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

LAT...LON 2760 8062 2759 8078 2764 8078 2764 8087
      2782 8086 2783 8047 2771 8040 2771 8039
      2772 8039 2775 8040 2781 8045 2783 8044
      2783 8042 2770 8037

$$


CRISTALDI

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 8:57 PM EDTFlash Flood WarningMLBBrevard2 hr
Aug 19, 9:08 PM EDTAreal Flood WarningMLBOsceola6 hr
Aug 19, 10:52 PM EDTHurricane WatchMLB14 hr
Aug 19, 11:28 PM EDTAreal Flood WarningMLBBrevard, Indian River, Martin, Okeechobee, Osceola, Saint Lucie7 hr
Aug 20, 5:39 AM EDTFlash Flood WarningMLBBrevard7 hr
Aug 20, 6:10 AM EDTAreal Flood WarningMLBBrevard, Indian River, Martin, Okeechobee, Osceola, Saint Lucie and 1 more8 hr
Aug 20, 6:24 AM EDTWind AdvisoryMLBOkeechobee36 hr
Aug 20, 12:32 PM EDTFlash Flood WarningMLBBrevard8 hr
Aug 20, 5:40 PM EDTFlash Flood WarningMLBBrevard3 hr

Nearby

Flash Flood Warnings in Florida, 2008Every flash flood warning in 2008

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.