Alert archive / Iowa / Flash Flood Warnings in 2000

Flash Flood Warning 4, NWS Des Moines, IA

June 23, 2000Wapello County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 23, 2000, 3:16 PM CDT for Wapello County, Iowa. 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 counties it named.

The facts

Issued: Jun 23, 2000, 3:16 PM CDT (20:16 UTC)
Expired: Jun 23, 2000, 5:15 PM CDT
In force: 119 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Wapello County, IA

The radar

The Des Moines radar (KDMX), 134 km from the middle of the area, began a volume at 20:18 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 12:00Z, 8.3 hours before the alert went out and 172 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2264 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 94 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 232019
FFWDMX
IAC179-232215-

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

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

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

* UNTIL 515 PM

* AT 313 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS ACROSS WAPELLO
  COUNTY...WITH MORE HEAVY RAIN EXPECTED THROUGH 400 PM.

* THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA...
  AND ADDITIONAL RAIN WILL PRODUCE SIGNIFICANT RUNOFF INTO SWOLLEN
  WATERWAYS. THUNDERSTORMS IN THE AREA ARE EXPECTED TO PRODUCE
  RAINFALL RATES OF ONE TO TWO INCHES PER HOUR.  NATIONAL WEATHER
  SERVICE DOPPLER RADAR ESTIMATES SHOW THAT 3 TO 5 INCHES OF RAIN HAS
  FALLEN ACROSS THE NORTHERN TWO-THIRDS OF THE COUNTY SINCE 1PM.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

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 4114 9265 4092 9263 4091 9219 4114 9220

SMALL
NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 11:03 AM CDT	Severe Thunderstorm Warning	DMX	Madison, Warren	37 min
Jun 23, 11:25 AM CDT	Severe Thunderstorm Warning	DMX	Polk	35 min
Jun 23, 12:54 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Monroe	36 min
Jun 23, 1:41 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	34 min
Jun 23, 2:17 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	43 min
Jun 23, 2:19 PM CDT	Tornado Warning	DMX	Wayne	26 min
Jun 23, 5:16 PM CDT	Flash Flood Warning	DMX	Wapello	119 min
Jun 23, 5:53 PM CDT	Flash Flood Warning	DMX	Monroe	2 hr
Jun 23, 6:25 PM CDT	Flash Flood Warning	DMX	Wapello	3 hr
Jun 23, 6:45 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass	30 min

Nearby

Flash Flood Warnings in Iowa, 2000 Every 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.