Alert archive / Florida / Flash Flood Warnings in 2008

Flash Flood Warning 13, NWS Miami, FL

August 20, 2008Glades County, Florida

NWS Miami, FL issued this flash flood warning at Aug 20, 2008, 12:36 AM EDT for Glades County, Florida. It was in force for 6 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, 12:36 AM EDT (04:36 UTC)
Expired
Aug 20, 2008, 6:30 AM EDT
In force
6 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

County Glades County, FL

The radar

The Melbourne radar (KMLB), 132 km from the middle of the area, began a volume at 04:36 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 00:00Z, 4.6 hours before the alert went out and 148 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 00:00Z on 2008-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 428 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 00:00Z on 2008-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
428 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
31 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 KMFL 200436
FFWMFL
FLC043-201030-
/O.NEW.KMFL.FF.W.0013.080820T0436Z-080820T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1236 AM EDT WED AUG 20 2008

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GLADES COUNTY IN SOUTHERN FLORIDA...
  THIS INCLUDES THE CITIES OF...PALMDALE...MOORE HAVEN...LAKEPORT...

* UNTIL 630 AM EDT

* AT 1220 AM EDT...EMERGENCY OF OPERATION CENTER OFFICIALS REPORTED 
  THAT WATER WAS CONTINUING TO RISE IN THE MUSE...ORTONA...AND   
  PALMDALE AREAS. LOCAL FIRE DEPARTMENTS HAVE BEEN SAND BAGGING
  THREATENED HOMES. ALSO...HIGHWAY 74 HAS BEEN CLOSED AND THAT 
  PORTIONS   OF HIGHWAY 29 AND WEST 78 HAVE WATER COVERING PARTS OF
  THE HIGHWAY. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ORTONA...
  MUSE...BUCKHEAD RIDGE AND BRIGHTON SEMINOLE INDIAN

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. THE WATER MAY OBSCURE DEEP CANALS OR PONDS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO A SAFER LOCATION IMMEDIATELY.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO THE NATIONAL
WEATHER SERVICE FORECAST OFFICE IN MIAMI. OR YOU CAN ALSO CALL THE
NATIONAL WEATHER SERVICE IN MIAMI DIRECTLY AT 305.229.4528 TO REPORT
FLOODING.

LAT...LON 2716 8087 2705 8097 2698 8108 2692 8107
      2693 8110 2689 8111 2683 8106 2682 8095
      2678 8095 2678 8157 2703 8156 2703 8129
      2705 8127 2713 8126 2713 8117 2720 8117
      2720 8091

$$
JR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 9:44 PM EDTAreal Flood AdvisoryMFLHendry3 hr
Aug 19, 10:45 PM EDTSpecial Marine WarningMFL90 min
Aug 20, 6:31 AM EDTAreal Flood WarningMFLGlades12 hr
Aug 20, 8:50 AM EDTSpecial Marine WarningMFL55 min
Aug 20, 11:01 AM EDTSpecial Marine WarningMFL59 min
Aug 20, 11:04 AM EDTSpecial Weather StatementMFLBroward56 min
Aug 20, 11:53 AM EDTSpecial Marine WarningMFL67 min
Aug 20, 12:12 PM EDTSpecial Marine WarningMFL63 min
Aug 20, 12:37 PM EDTSpecial Marine WarningMFL53 min
Aug 20, 12:52 PM EDTSpecial Marine WarningMFL53 min
Aug 20, 1:19 PM EDTAreal Flood WarningMFLHendry8 hr
Aug 20, 1:41 PM EDTSpecial Marine WarningMFL2 hr
Aug 20, 1:44 PM EDTSpecial Weather StatementMFLMiami-Dade61 min
Aug 20, 2:31 PM EDTSpecial Marine WarningMFL89 min
Aug 20, 2:58 PM EDTSpecial Weather StatementMFLMiami-Dade62 min
Aug 20, 3:44 PM EDTSpecial Marine WarningMFL2 hr
Aug 20, 7:59 PM EDTAreal Flood WarningMFLGlades, Hendry4 days

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.