Alert archive / Florida / Flash Flood Warnings in 2008

Flash Flood Warning 10, NWS Melbourne, FL

August 20, 2008Brevard County, Florida

NWS Melbourne, FL issued this flash flood warning at Aug 20, 2008, 5:40 PM EDT for Brevard 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, 5:40 PM EDT (21:40 UTC)
Expired: Aug 20, 2008, 8:30 PM EDT
In force: 3 hr
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Flood severity: None

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 51 km from the middle of the area, began a volume at 21:40 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, 9.7 hours before the alert went out and 35 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: 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 202140
FFWMLB
FLC009-210030-
/O.NEW.KMLB.FF.W.0010.080820T2140Z-080821T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN BREVARD COUNTY IN EAST CENTRAL FLORIDA...
  THIS INCLUDES THE CITIES OF...SHARPES...PORT CANAVERAL...CAPE
  CANAVERAL...TITUSVILLE AIRPORT...TITUSVILLE...PORT SAINT JOHN...
  LONE CABBAGE FISH CAMP...

* UNTIL 830 PM EDT

* AT 535 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  TORRENTIAL RAINFALL IN A BAND SOUTH OF THE CENTER OF TROPICAL
  STORM FAY HAS EXPANDED NORTHWARD ACROSS NORTHERN BREVARD COUNTY.

* RADAR ESTIMATES RAINFALL AMOUNTS OF NEARLY TWO INCHES IN THE
  PORT CANAVERAL AREA DURING THE LAST HOUR...WITH RAINFALL AMOUNTS
  IN BETWEEN ONE AND THREE INCHES OVER THE LAST THREE HOURS FROM
  THE COCOA AND COCOA BEACH AREAS NORTHWARD TO NORTH MERITT ISLAND
  AND TITUSVILLE.

ADDITIONAL RAINFALL AMOUNTS BETWEEN ONE AND THREE INCHES ARE 
POSSIBLE IN THE WARNED AREA THROUGH EARLY EVENING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA...TAKE IMMEDIATE PRECAUTIONS TO 
PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS FLOWING WATERS OR 
WATERS 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 2837 8061 2837 8062 2855 8058 2858 8060
      2854 8060 2837 8066 2837 8072 2862 8080
      2837 8073 2835 8087 2878 8097 2878 8084
      2862 8080 2862 8079 2878 8083 2867 8066
      2872 8070 2872 8067 2846 8052

$$


CRISTALDI

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, 5:39 AM EDT	Flash Flood Warning	MLB	Brevard	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

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.