Alert archive / Florida / Flash Flood Warnings in 2008

Flash Flood Warning 7, NWS Melbourne, FL

August 20, 2008Brevard County, Florida

NWS Melbourne, FL issued this flash flood warning at Aug 20, 2008, 5:39 AM EDT for Brevard County, Florida. It was in force for 7 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, 5:39 AM EDT (09:39 UTC)
Expired: Aug 20, 2008, 12:30 PM EDT
In force: 7 hr
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Flood severity: None

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 11 km from the middle of the area, began a volume at 09:42 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 00:00Z, 9.7 hours before the alert went out and 33 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 406 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -75 m²/s²
0-3 km storm-relative helicity: -82 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 200939
FFWMLB
FLC009-201230-
/O.NEW.KMLB.FF.W.0007.080820T0939Z-080820T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN BREVARD COUNTY IN EAST CENTRAL FLORIDA...  THIS INCLUDES 
THE CITIES OF...MELBOURNE...EAU GALLIE...WEST 
MELBOURNE...SUNTREE...PINEDA...PALM SHORES...

* UNTIL 830 AM EDT

* AT 528 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN IN A RAIN BAND NEAR THE CENTER OF FAY OVER CENTRAL 
BREVARD COUNTY. DOPPLER RADAR RAINFALL ESTIMATES INDICATE 2 TO 4  
INCHES OF RAIN HAVE FALLEN ACROSS THIS AREA SINCE 4 AM. REPORTS FROM 
THE BREVARD COUNTY SHERIFFS OFFICE INDICATE THAT FLOODING OF ROADS 
WAS OCCURRING MAKING IT IMPASSABLE FOR CARS ON SEVERAL 
STREETS...INCLUDING SECTIONS OF APOLLO AND SARNO ROAD IN MELBOURNE. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
MELBOURNE...EAU GALLIE...WEST MELBOURNE...SUNTREE.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH 8 AM.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF
HIGHWAYS...STREETS AND INTERSECTIONS 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.

WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN 
AROUND...DONT DROWN.

LAT...LON 2809 8059 2816 8063 2809 8060 2800 8073
      2813 8086 2816 8086 2832 8071 2832 8070
      2828 8069 2833 8070 2836 8067 2834 8065
      2829 8066 2824 8064 2823 8064 2827 8061
      2824 8059 2811 8057

$$

MRV

3 follow-up statements

000 
WGUS72 KMLB 201101
FFSMLB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
701 AM EDT WED AUG 20 2008

FLC009-201230-
/O.CON.KMLB.FF.W.0007.000000T0000Z-080820T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BREVARD FL-
701 AM EDT WED AUG 20 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 AM EDT FOR
SOUTHERN BREVARD COUNTY...

AT 655 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A PERSISTENT AREA OF TORRENTIAL RAINFALL OVER THE WARNED 
AREA. THIS RAIN WAS OCCURRING JUST SOUTH OF THE NEARLY STATIONARY 
CENTER OF TROPICAL STORM FAY.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
VIERA...SUNTREE AND MELBOURNE.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE LIKELY IN THE 
WARNED AREA THROUGH 8 AM WITH ADDITIONAL ACCUMULATION AFTER 8 AM IF 
THE CIRCULATION OF FAY REMAINS TEMPORARILY STALLED.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS...UNDERPASSES AND LOW LYING AREAS.

NUMEROUS ROADWAYS IN THE WARNED AREA ARE FLOODED AND AT LEAST 
PARTIALLY IMPASSABLE. SOME FLOODED AREAS IN MELBOURNE INCLUDE THE 
WICKHAM AND PARKWAY INTERSECTION...ELLIS AND JOHN RODES 
BOULEVARD...AND BABCOCK STREET NEAR WALMART. ALSO NORTH OF 
MELBOURNE...VIERA BOULEVARD AT U.S. 1...FISKE AND I-95 
SOUTHBOUND...A1A AND PINEDA CAUSEWAY...AND U.S. 1 WESTBOUND ONTO 
PINEDA CAUSEWAY ARE AT LEAST PARTIALLY FLOODED.

LAT...LON 2809 8059 2816 8063 2809 8060 2800 8073
      2813 8086 2816 8086 2832 8071 2832 8070
      2828 8069 2833 8070 2836 8067 2834 8065
      2829 8066 2824 8064 2823 8064 2827 8061
      2824 8059 2811 8057

$$

SPRATT

000 
WGUS52 KMLB 201233
FFWMLB
FLC009-201630-
/O.EXT.KMLB.FF.W.0007.000000T0000Z-080820T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  SOUTHERN BREVARD COUNTY IN EAST CENTRAL FLORIDA...  THIS INCLUDES  
  THE CITIES OF...MELBOURNE...PALM BAY...SATELLITE BEACH...VIERA...

* UNTIL 1230 PM EDT

* AT 832 AM EDT...FLASH FLOODING WAS REPORTED FROM A THUNDERSTORM
  OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO EAU 
GALLIE...SUNTREE...INDIALANTIC...MICCO...GRANT.

RADAR INDICATED RAIN AMOUNTS OF 3 TO 5 INCHES HAVE OCCURRED SINCE 4 
AM THIS MORNING ACROSS MUCH OF SOUTHERN BREVARD COUNTY. ADDITIONAL 
RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE DUE TO THE VERY SLOW 
NORTH DRIFT OF TROPICAL STORM FAY. 

EXCESSIVE ACCUMULATING RAINFALL FROM SQUALL BANDS WILL CAUSE 
CONTINUED FLOODING...AND THE LIKELY CLOSURES OF SOME 
HIGHWAYS...STREETS AND INTERSECTIONS. 

NUMEROUS ROADWAYS IN THE WARNED AREA ARE FLOODED AND AT LEAST 
PARTIALLY IMPASSABLE. SOME FLOODED AREAS IN MELBOURNE INCLUDE THE 
WICKHAM AND PARKWAY INTERSECTION...ELLIS AND JOHN RODES 
BOULEVARD...AND BABCOCK STREET NEAR WALMART IN PALM BAY. ALSO NORTH 
OF MELBOURNE...VIERA BOULEVARD AT U.S. 1...FISKE AND I-95 
SOUTHBOUND...A1A AND PINEDA CAUSEWAY...AND U.S. 1 WESTBOUND ONTO 
PINEDA CAUSEWAY ARE AT LEAST PARTIALLY FLOODED.

FLOODING IS OCCURRING. DO NOT ATTEMPT TO CROSS WATER COVERED 
DIPS...OR LOW WATER CROSSINGS. YOUR VEHICLE MAY STALL IF YOU ATTEMPT 
TO DRIVE THROUGH WATER OF UNKNOWN DEPTH.

LAT...LON 2809 8059 2816 8063 2809 8060 2800 8073
      2813 8086 2816 8086 2832 8071 2832 8070
      2828 8069 2833 8070 2836 8067 2834 8065
      2829 8066 2824 8064 2823 8064 2827 8061
      2824 8059 2811 8057

$$

JP

000 
WGUS72 KMLB 201421
FFSMLB

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1021 AM EDT WED AUG 20 2008

FLC009-201630-
/O.CON.KMLB.FF.W.0007.000000T0000Z-080820T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BREVARD FL-
1021 AM EDT WED AUG 20 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT FOR
SOUTHERN BREVARD COUNTY...

AT 1020 AM EDT...THE CENTER OF TROPICAL STORM FAY...LOCATED NEAR 
CAPE CANAVERAL WAS DRIFTING VERY SLOWLY NORTH. VERY HEAVY RAIN 
ASSOCIATED WITH THE RAINBANDS WAS ROTATING AROUND FAY. 

SIGNIFICANT RAINFALL ACCUMULATIONS ACROSS SOUTHERN BREVARD COUNTY 
ARE CREATING THE HAZARD OF WATER ENTERING HOMES AND BUSINESSES IN 
TRADITIONALLY FLOOD PRONE AREAS. ROAD DETOURS AND SOME CLOSURES ARE 
REPORTED AROUND MELBOURNE...PALM BAY...EAU GALLIE...VIERA AND 
SUNTREE.  

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VIERA...EAU 
GALLIE...INDIALANTIC...MELBOURNE BEACH...GRANT VALKARIA AND MICCO. 

HEAVY RAIN WAS ALSO OCCURRING ACROSS INDIAN RIVER COUNTY AND 
NUISANCE FLOODING IS LIKELY IN LOW LYING SPOTS FROM SEBASTIAN TO 
VERO BEACH AND FELLSMERE. 

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE DUE ACROSS 
BREVARD AND INDIAN RIVER COUNTIES TO THE VERY SLOW NORTHWARD DRIFT 
OF TROPICAL STORM FAY. 

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 2809 8059 2816 8063 2809 8060 2800 8073
      2813 8086 2816 8086 2832 8071 2832 8070
      2828 8069 2833 8070 2836 8067 2834 8065
      2829 8066 2824 8064 2823 8064 2827 8061
      2824 8059 2811 8057

$$

JP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 8:57 PM EDT	Flash Flood Warning	MLB	Brevard	2 hr
Aug 19, 9:08 PM EDT	Areal Flood Warning	MLB	Osceola	6 hr
Aug 19, 10:52 PM EDT	Hurricane Watch	MLB		14 hr
Aug 19, 11:28 PM EDT	Areal Flood Warning	MLB	Brevard, Indian River, Martin, Okeechobee, Osceola, Saint Lucie	7 hr
Aug 20, 6:10 AM EDT	Areal Flood Warning	MLB	Brevard, Indian River, Martin, Okeechobee, Osceola, Saint Lucie and 1 more	8 hr
Aug 20, 6:24 AM EDT	Wind Advisory	MLB	Okeechobee	36 hr
Aug 20, 12:32 PM EDT	Flash Flood Warning	MLB	Brevard	8 hr
Aug 20, 5:08 PM EDT	Flash Flood Warning	MLB	Indian River	3 hr
Aug 20, 5:40 PM EDT	Flash Flood Warning	MLB	Brevard	3 hr

Nearby

Flash Flood Warnings in Florida, 2008 Every 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.