Alert archive / Iowa / Flash Flood Warnings in 2000

Flash Flood Warning 9, NWS Des Moines, IA

June 23, 2000Davis County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 23, 2000, 7:35 PM CDT for Davis County, Iowa. It was in force for 3 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
Jun 23, 2000, 7:35 PM CDT (00:35 UTC)
Expired
Jun 23, 2000, 10:30 PM CDT
In force
3 hr
Issued by
NWS Des Moines, IA
Area
Whole counties

County Davis County, IA

The radar

The Des Moines radar (KDMX), 155 km from the middle of the area, began a volume at 00:38 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

Davenport, (KDVN), launched 00:00Z, 0.6 hours before the alert went out and 187 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 240038
FFWDMX
IAC051-240330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
735 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

* UNTIL 1030 PM

* AT 730 PM...LAW ENFORCEMENT REPORTED FLASH FLOODING ALONG SOAP
  CREEK NEAR FLORIS...OR ABOUT 14 MILES SOUTH OF OTTUMWA.  OTHER
  STREAMS AND CREEKS AFFECTED ARE CHEQUEST...BURR OAK...SALT...AND
  HICKORY CREEKS.

* SLOW MOVING THUNDERSTORMS PRODUCING TORRENTIAL RAINFALL WILL
  CONTINUE IN THE WARNING AREA OVER THE NEXT 2 HOURS.
  RAINFALL RATES WILL AVERAGE 1 TO 2 INCHES PER HOUR.

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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.

MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES...ESPECIALLY AT NIGHT.
DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER
COVERS THE ROADWAY.

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.

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, 7:53 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
Jun 23, 11:38 PM CDTFlash Flood WarningDMXDavis, Wapello15 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; radar from the NEXRAD Level II archive.