Alert archive / Iowa / Flash Flood Warnings in 2004

Flash Flood Warning 20, NWS Des Moines, IA

May 24, 2004Marion County, Iowa

NWS Des Moines, IA issued this flash flood warning at May 24, 2004, 6:38 PM CDT for Marion County, Iowa. It was in force for 18 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: May 24, 2004, 6:38 PM CDT (23:38 UTC)
Expired: May 25, 2004, 12:45 PM CDT
In force: 18 hr
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Marion County, IA

The radar

The Des Moines radar (KDMX), 69 km from the middle of the area, began a volume at 23:38 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

Omaha, NE (KOAX), launched 12:00Z, 11.6 hours before the alert went out and 277 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: 731 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 289 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDMX 242338
FFWDMX
IAC125-250545-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
638 PM CDT MON MAY 24 2004

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MARION COUNTY IN SOUTH CENTRAL IOWA

* UNTIL 1245 AM

* AT 507 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS IN THE WARNING AREA.

* THE GROUND IS ALREADY SATURATED BY RAINFALL...AND ADDITIONAL RAIN
  WILL PRODUCE SIGNIFICANT RUNOFF INTO SWOLLEN WATERWAYS.   
THUNDERSTORMS ARE EXPECTED TO PRODUCE RAINFALL RATES OF ONE TO TWO   
INCHES PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG SMALL 
STREAMS AND CREEKS.

OTHER WARNING LOCATIONS INCLUDE...
HARVEY...KNOXVILLE...KNOXVILLE MUNICIPAL AIRPORT...MARYSVILLE...
MELCHER-DALLAS...PELLA...PELLA MUNICIPAL AIRPORT AND PLEASANTVILLE

FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER
COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF
FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD.

LAT...LON 4149 9290 4117 9291 4118 9328 4148 9329

$$

FORSTER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 2:26 PM CDT	Severe Thunderstorm Warning	DMX	Sac	34 min
May 24, 2:34 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass, Guthrie	41 min
May 24, 2:47 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	28 min
May 24, 2:49 PM CDT	Severe Thunderstorm Warning	DMX	Sac	11 min
May 24, 2:58 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	32 min
May 24, 3:00 PM CDT	Severe Thunderstorm Warning	DMX	Sac	45 min
May 24, 3:14 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Cass, Guthrie	46 min
May 24, 3:15 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	45 min
May 24, 3:19 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	41 min
May 24, 3:51 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	39 min
May 24, 4:04 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	26 min
May 24, 4:06 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Webster	39 min
May 24, 4:13 PM CDT	Tornado Warning	DMX	Adair	32 min
May 24, 4:42 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	48 min
May 24, 4:45 PM CDT	Tornado Warning	DMX	Madison	45 min
May 24, 4:57 PM CDT	Flash Flood Warning	DMX	Humboldt	4 hr
May 24, 5:02 PM CDT	Flash Flood Warning	DMX	Dallas, Madison	6 hr
May 24, 5:04 PM CDT	Tornado Warning	DMX	Dallas	56 min
May 24, 5:07 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton	38 min
May 24, 5:12 PM CDT	Flash Flood Warning	DMX	Audubon, Carroll, Greene, Guthrie	6 hr
May 24, 5:18 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	57 min
May 24, 5:19 PM CDT	Tornado Warning	DMX	Polk	56 min
May 24, 5:30 PM CDT	Tornado Warning	DMX	Madison	15 min
May 24, 5:31 PM CDT	Flash Flood Warning	DMX	Boone	6 hr
May 24, 5:36 PM CDT	Tornado Warning	DMX	Warren	24 min
May 24, 5:39 PM CDT	Flash Flood Warning	DMX	Polk	6 hr
May 24, 5:43 PM CDT	Tornado Warning	DMX	Madison	32 min
May 24, 5:59 PM CDT	Tornado Warning	DMX	Warren	46 min
May 24, 6:17 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	28 min
May 24, 6:21 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	39 min
May 24, 6:26 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	64 min
May 24, 6:26 PM CDT	Tornado Warning	DMX	Madison	49 min
May 24, 6:28 PM CDT	Flash Flood Warning	DMX	Taylor	19 hr
May 24, 6:35 PM CDT	Tornado Warning	DMX	Taylor	40 min
May 24, 6:41 PM CDT	Tornado Warning	DMX	Marion	49 min
May 24, 6:42 PM CDT	Flash Flood Warning	DMX	Warren	18 hr
May 24, 6:44 PM CDT	Severe Thunderstorm Warning	DMX	Polk	46 min
May 24, 6:45 PM CDT	Tornado Warning	DMX	Warren	30 min
May 24, 6:47 PM CDT	Tornado Warning	DMX	Monroe	43 min
May 24, 6:52 PM CDT	Flash Flood Warning	DMX	Decatur, Ringgold	18 hr
May 24, 6:52 PM CDT	Tornado Warning	DMX	Ringgold	38 min
May 24, 6:55 PM CDT	Flash Flood Warning	DMX	Mahaska	18 hr

Nearby

Flash Flood Warnings in Iowa, 2004 Every flash flood warning in 2004

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.