Alert archive / Florida / Flash Flood Warnings in 2009

Flash Flood Warning 2, NWS Melbourne, FL

May 22, 2009Volusia County, Florida

NWS Melbourne, FL issued this flash flood warning at May 22, 2009, 4:01 PM EDT for Volusia County, Florida. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 22, 2009, 4:01 PM EDT (20:01 UTC)
Expired: May 22, 2009, 6:00 PM EDT
In force: 119 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Flood severity: None

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 113 km from the middle of the area, began a volume at 20:03 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, 8.0 hours before the alert went out and 83 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: 1025 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 495 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 57 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 222001
FFWMLB
FLC127-222200-
/O.NEW.KMLB.FF.W.0002.090522T2001Z-090522T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
401 PM EDT FRI MAY 22 2009

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN VOLUSIA COUNTY IN FLORIDA...
  THIS INCLUDES THE CITIES OF...OAK HILL...NEW SMYRNA BEACH...SOUTH
  DAYTONA...PORT ORANGE...PONCE INLET...ORMOND BEACH...MAYTOWN...
  HOLLY HILL...EDGEWATER...DAYTONA BEACH...

* UNTIL 600 PM EDT.

* AT 400 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  BANDS OF VERY HEAVY RAINFALL MOVING NORTHWARD FROM THE BREVARD
  COUNTY LINE.  THIS RAIN IS MOVING INTO AN AREA THAT HAS ALREADY
  RECEIVED TORRENTIAL RAINFALL AMOUNTS IN THE PAST FEW DAYS. 
  THE ADDITIONAL RAINS WILL ACT TO FURTHER WORSEN AN ALREADY
  SERIOUS FLOODING SITUATION. ADDITIONAL RAINFALL AMOUNTS OF TWO
  TO FOUR INCHES WITH ISOLATED HIGHER AMOUNTS MAY OCCUR THROUGH 
  6 PM. PERSONS IN THESE AREAS SHOULD TAKE QUICK ACTION TO PROTECT
  LIFE AND PROPERTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES OR 
WHERE WATER OF UNKNOWN DEPTH COVERS THE ROAD. IT ONLY TAKES A COUPLE 
OF FEET OF WATER TO MAKE MOST VEHICLES BUOYANT.

&&

LAT...LON 2940 8107 2915 8096 2910 8091 2908 8091
      2886 8076 2885 8076 2884 8078 2887 8080
      2885 8081 2886 8082 2883 8082 2878 8102
      2927 8135 2927 8116 2941 8116 2943 8111
      2943 8109

$$
 
52

1 follow-up statement

000 
WGUS72 KMLB 222153
FFSMLB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
553 PM EDT FRI MAY 22 2009

FLC127-222202-
/O.EXP.KMLB.FF.W.0002.000000T0000Z-090522T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VOLUSIA-
553 PM EDT FRI MAY 22 2009

...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM EDT FOR EASTERN
VOLUSIA COUNTY...

AREAS THAT ALREADY HAVE FLOODING OCCURRING OR ARE APPROACHING 
FLOODING WILL REMAIN VULNERABLE TO ADDITIONAL HEAVY SHOWER BANDS 
THAT MAY REDEVELOP THROUGH THE AFTERNOON...AND ADDITIONAL FLASH 
FLOODING WARNINGS MAY BECOME NECESSARY. ALL OF VOLUSIA COUNTY 
REMAINS UNDER AN AREAL FLOOD WARNING THROUGH 10 AM SATURDAY.

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 2940 8107 2915 8096 2910 8091 2908 8091
      2886 8076 2885 8076 2884 8078 2887 8080
      2885 8081 2886 8082 2883 8082 2878 8102
      2927 8135 2927 8116 2941 8116 2943 8111
      2943 8109

$$

52

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 4:44 AM EDT	Small Craft Advisory for Hazardous Seas	MLB		53 hr
May 22, 6:22 AM EDT	Areal Flood Warning	MLB	Volusia	52 hr
May 22, 8:07 AM EDT	Flash Flood Warning	MLB	Volusia	3 hr
May 22, 9:11 AM EDT	Special Marine Warning	MLB		79 min
May 22, 11:41 AM EDT	Special Marine Warning	MLB		94 min
May 22, 1:45 PM EDT	Tornado Warning	MLB	Osceola	33 min
May 22, 1:57 PM EDT	Special Marine Warning	MLB		63 min
May 22, 2:58 PM EDT	Areal Flood Advisory	MLB	Brevard, Lake, Orange, Osceola, Seminole, Volusia	92 min
May 22, 3:12 PM EDT	Areal Flood Warning	MLB	Orange	78 min

Nearby

Flash Flood Warnings in Florida, 2009 Every flash flood warning in 2009

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.