Alert archive / Florida / Flash Flood Warnings in 2008

Flash Flood Warning 13, NWS Melbourne, FL

August 21, 2008Brevard County, Florida

NWS Melbourne, FL issued this flash flood warning at Aug 21, 2008, 8:05 AM EDT for Brevard County, Florida. It was in force for 4 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 21, 2008, 8:05 AM EDT (12:05 UTC)
Expired
Aug 21, 2008, 12:00 PM EDT
In force
4 hr
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Flood severity
None

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 36 km from the middle of the area, began a volume at 12:05 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

Tampa Bay, FL (KTBW), launched 12:00Z, 0.1 hours before the alert went out and 188 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, Tampa Bay, FL at 12:00Z on 2008-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1122 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2008-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
1122 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KMLB 211205
FFWMLB
FLC009-211600-
/O.NEW.KMLB.FF.W.0013.080821T1205Z-080821T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
805 AM EDT THU AUG 21 2008

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BREVARD COUNTY IN EAST CENTRAL FLORIDA...
  
* UNTIL NOON EDT

* AT 751 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED SEVERAL 
  ROAD CLOSURES ACROSS THE COUNTY AND RADAR CONTINUES TO SHOW SHOWERS
  SPREADING ACROSS THE AREA.  ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 
  INCHES WILL BE POSSIBLE THIS MORNING.

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 2794 8049 2816 8063 2794 8053 2793 8082
      2848 8087 2872 8096 2874 8083 2835 8072
      2860 8073 2869 8079 2874 8075 2866 8067
      2875 8072 2875 8069 2861 8059 2861 8058
      2845 8052 2839 8059 2821 8059

$$

RL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 8:30 PM EDTFlash Flood WarningMLBBrevard6 hr
Aug 21, 2:36 AM EDTFlash Flood WarningMLBBrevard, Orange5 hr
Aug 21, 10:35 AM EDTRiver Flood WarningMLBLake, Volusia54 days
Aug 21, 12:10 PM EDTAreal Flood WarningMLBBrevard, Lake, Orange, Seminole, Volusia6 hr
Aug 21, 4:39 PM EDTFlash Flood WarningMLBLake, Orange, Seminole, Volusia4 hr
Aug 21, 6:45 PM EDTFlash Flood WarningMLBBrevard105 min

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.