Alert archive / Iowa / Flash Flood Warnings in 2000

Flash Flood Warning 11, NWS Des Moines, IA

June 23, 2000Davis County, Wapello County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 23, 2000, 11:38 PM CDT for Davis County, Wapello County, Iowa. It was in force for 15 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jun 23, 2000, 11:38 PM CDT (04:38 UTC)
Expired
Jun 24, 2000, 3:00 PM CDT
In force
15 hr
Issued by
NWS Des Moines, IA
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Davis County, IA, Wapello County, IA

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 4.6 hours before the alert went out and 185 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, Davenport, at 00:00Z on 2000-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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, Davenport, at 00:00Z on 2000-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
6 J/kg
Mixed-layer CIN
-205 J/kg
Mixed-layer LCL
667 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
195 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 
WGUS53 KDMX 240436
FFWDMX
IAC051-179-240800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1138 PM CDT FRI JUN 23 2000

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DAVIS COUNTY IN SOUTHEAST IOWA
  WAPELLO COUNTY IN SOUTHEAST IOWA
  THIS INCLUDES THE CITY OF OTTUMWA AND BLOOMFIELD

* UNTIL 300 AM

* AT 1132 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS OVER SOUTHERN
  WAPELLO AND NORTHERN DAVIS COUNTIES.  THESE STORMS WERE NEARLY
  STATIONARY.

* SLOW MOVING THUNDERSTORMS PRODUCING TORRENTIAL RAINFALL WILL
  CONTINUE IN THE WARNING AREA OVER THE NEXT ONE TO TWO HOURS.
  RAINFALL RATES WILL AVERAGE 1 TO 2 INCHES PER HOUR. NUMEROUS SMALL
  STREAMS AND CREEKS WILL BE AFFECTED...POSSIBLY GOING OUT OF THEIR
  BANKS.  SOME ROADS REMAIN CLOSED IN THE OTTUMWA AREA...BUT MOST NEW
  RAINFALL AT LEAST IN THE NEXT HOUR WILL BE SOUTH OF OTTUMWA.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. DO NOT DRIVE INTO WATER OF
UNKNOWN DEPTH...THE ROAD MAYBE WASHED OUT.

IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...
OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA...LIVING NEAR THE AFFECTED
WATERWAYS...YOU SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND
PROPERTY.

LAT...LON 4063 9262 4064 9222 4115 9220 4115 9262&

KULA
NNNN

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 23, 7:00 PM CDTFlash Flood WarningDMXMahaska, Monroe3 hr
Jun 23, 7:12 PM CDTSevere Thunderstorm WarningDMXAdair, Cass33 min
Jun 23, 7:35 PM CDTFlash Flood WarningDMXDavis3 hr
Jun 23, 7:53 PM CDTFlash Flood WarningDMXMarion3 hr
Jun 23, 8:08 PM CDTSevere Thunderstorm WarningDMXMadison37 min
Jun 23, 8:14 PM CDTSevere Thunderstorm WarningDMXTaylor46 min
Jun 23, 8:32 PM CDTTornado WarningDMXTaylor28 min
Jun 23, 9:30 PM CDTSevere Thunderstorm WarningDMXMahaska45 min
Jun 23, 11:36 PM CDTFlash Flood WarningDMXMahaska14 hr

Nearby

Flash Flood Warnings in Iowa, 2000Every flash flood warning in 2000

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.