Alert archive / Florida / Flash Flood Warnings in 1999

Flash Flood Warning 19, NWS Miami, FL

October 15, 1999Broward County, Collier County, Palm Beach County, Florida

NWS Miami, FL issued this flash flood warning at Oct 15, 1999, 8:08 PM EDT for Broward County, Collier County, Palm Beach 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 counties it named.

The facts

Issued
Oct 15, 1999, 8:08 PM EDT (00:08 UTC)
Expired
Oct 16, 1999, 12:00 AM EDT
In force
4 hr
Issued by
NWS Miami, FL
Area
Whole counties

Counties Broward County, FL, Collier County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 84 km from the middle of the area, began a volume at 00:08 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

Key West, FL (KEYW), launched 00:00Z, 0.1 hours before the alert went out and 216 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, Key West, FL at 00:00Z on 1999-10-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 253 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Key West, FL at 00:00Z on 1999-10-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
253 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 160008
FFWMIA
FLC011-021-099-160400-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MIAMI FL
808 PM EDT FRI OCT 15 1999

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* FLOOD WARNING FOR...
  PALM BEACH COUNTY IN SOUTHEASTERN FLORIDA
  BROWARD COUNTY IN SOUTHEASTERN FLORIDA
  EASTERN COLLIER COUNTY IN SOUTHWESTERN FLORIDA

* UNTIL MIDNIGHT EDT

* AT 805 PM EDT...DOPPLER RADAR CONTINUED TO INDICATE RAINBANDS
  ...ASSOCIATED WITH HURRICANE IRENE...MOVING ACROSS METROPOLITAN
  AREAS OF BROWARD AND PALM BEACH COUNTIES AS WELL AS OVER EXTREME
  EASTERN SECTIONS OF COLLIER COUNTY. THESE RAINBANDS CONTAIN VERY
  HEAVY RAINS WITH RAINFALL RATES OF UP TO TWO INCHES PER HOUR.
  ADDITIONAL ACCUMULATIONS OF UP TO FOUR INCHES ARE POSSIBLE THROUGH
  THE MIDNIGHT. FOR THIS REASON A FLOOD WARNING CONTINUES IN EFFECT
  FOR BROWARD...PALM BEACH AND EASTERN COLLIER COUNTIES THROUGH
  MIDNIGHT.

  THE HEAVIEST RAIN WAS OVER METROPOLITAN SECTIONS OF BROWARD AND
  SOUTHEAST SECTIONS OF PALM BEACH COUNTY. THIS RAIN AREA WILL
  CONTINUE TO SPREAD NORTHWARD AS IRENE CONTINUES ITS NORTHWARD
  TRACK ACROSS SOUTHEAST FLORIDA THIS EVENING.

A FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS
BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER
TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO
ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. DO NOT DRIVE INTO AREAS OF PONDING WATER OF
UNKNOWN DEPTH. IF FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP OR TO
FLOODING WHEN WATER BEGINS R~ISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 15, 10:06 PM EDTFlash Flood WarningMFLBroward, Palm Beach4 hr

Nearby

Flash Flood Warnings in Florida, 1999Every flash flood warning in 1999

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.