Alert archive / Florida / Flash Flood Warnings in 2008

Flash Flood Warning 1, NWS Melbourne, FL

August 19, 2008Martin County, Florida

NWS Melbourne, FL issued this flash flood warning at Aug 19, 2008, 8:43 AM EDT for Martin County, Florida. It was in force for 2 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 19, 2008, 8:43 AM EDT (12:43 UTC)
Expired
Aug 19, 2008, 10:45 AM EDT
In force
2 hr
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Flood severity
None

County Martin County, FL

The radar

The Melbourne radar (KMLB), 123 km from the middle of the area, began a volume at 12:45 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

Miami, FL (KMFL), launched 12:00Z, 0.7 hours before the alert went out and 141 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 2008-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2159 joules per kilogram.LCLEL10008507005003002001001 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, Miami, FL at 12:00Z on 2008-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 237 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
2159 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
466 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
237 m²/s²
0-3 km storm-relative helicity
252 m²/s²
Significant tornado parameter
2.4
Supercell composite
16.2

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KMLB 191243
FFWMLB
FLC085-191445-
/O.NEW.KMLB.FF.W.0001.080819T1243Z-080819T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
843 AM EDT TUE AUG 19 2008

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN MARTIN COUNTY IN EAST CENTRAL FLORIDA...
  THIS INCLUDES THE CITIES OF...STUART...PALM CITY...HOBE SOUND...

* UNTIL 1045 AM EDT

* AT 836 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  VERY HEAVY RAIN FROM FAST MOVING SQUALLS ALONG THE MARTIN COUNTY 
  COAST AND EXTENDING SOUTHWARD ALONG THE PALM BEACH COUNTY COAST. 
  RAINFALL AMOUNTS AROUND 4 INCHES HAVE ALREADY OCCURED IN SOME
  LOCATIONS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROCKY
  POINT...PORT SALERNO AND HOBE SOUND BEACH

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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 2719 8042 2721 8020 2718 8018 2721 8018
      2721 8017 2717 8015 2718 8018 2716 8019
      2715 8015 2704 8009 2697 8007 2697 8014
      2695 8015 2696 8029

$$

RL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 1:32 AM EDTTornado WarningMLBMartin43 min
Aug 19, 2:15 AM EDTTornado WarningMLBMartin33 min
Aug 19, 3:06 AM EDTTornado WarningMLBOkeechobee39 min
Aug 19, 5:50 AM EDTTornado WarningMLBSaint Lucie40 min
Aug 19, 6:28 AM EDTTornado WarningMLBSaint Lucie20 min
Aug 19, 6:28 AM EDTTornado WarningMLBMartin47 min
Aug 19, 6:45 AM EDTTornado WarningMLBMartin, Saint Lucie30 min
Aug 19, 9:03 AM EDTTornado WarningMLBMartin14 min
Aug 19, 9:52 AM EDTTornado WarningMLBMartin23 min
Aug 19, 10:51 AM EDTFlash Flood WarningMLBMartin, Saint Lucie114 min
Aug 19, 12:26 PM EDTFlash Flood WarningMLBIndian River, Martin, Okeechobee, Saint Lucie4 hr
Aug 19, 12:46 PM EDTTornado WarningMLBIndian River, Saint Lucie29 min
Aug 19, 1:28 PM EDTTornado WarningMLBBrevard, Osceola32 min
Aug 19, 1:53 PM EDTTornado WarningMLBIndian River22 min
Aug 19, 2:17 PM EDTTornado WarningMLBIndian River28 min
Aug 19, 2:30 PM EDTFlash Flood WarningMLBBrevard4 hr
Aug 19, 3:23 PM EDTTornado WarningMLBOsceola34 min
Aug 19, 4:21 PM EDTAreal Flood WarningMLBIndian River, Martin, Okeechobee, Osceola, Saint Lucie4 hr
Aug 19, 4:29 PM EDTTornado WarningMLBBrevard31 min
Aug 19, 6:13 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.