Alert archive / Iowa / Flash Flood Warnings in 2004

Flash Flood Warning 15, NWS Des Moines, IA

May 24, 2004Dallas County, Madison County, Iowa

NWS Des Moines, IA issued this flash flood warning at May 24, 2004, 5:02 PM CDT for Dallas County, Madison County, Iowa. It was in force for 6 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, 5:02 PM CDT (22:02 UTC)
Expired: May 24, 2004, 11:00 PM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

Counties Dallas County, IA, Madison County, IA

The radar

The Des Moines radar (KDMX), 29 km from the middle of the area, began a volume at 22:03 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, 10.0 hours before the alert went out and 200 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 242203
FFWDMX
IAC049-121-250400-

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

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DALLAS COUNTY IN CENTRAL IOWA
  MADISON COUNTY IN SOUTH CENTRAL IOWA

* UNTIL 1100 PM

* AT 500 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 1 TO 2   
INCHES PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG THE   SMALL 
STREAMS AND LOCAL CREEKS.

OTHER WARNING LOCATIONS INCLUDE...
ADEL...DALLAS CENTER...DAWSON...DE SOTO...DEXTER...EARLHAM...EAST
PERU...MACKSBURG...MINBURN...PATTERSON...PERRY...PERRY MUNICIPAL
AIRPORT...REDFIELD...TRURO...VAN METER...WAUKEE...WINTERSET AND
WINTERSET MADISON COUNTY AIRPORT

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 4184 9384 4117 9382 4118 9424 4184 9426

$$

FORSTER

2 follow-up statements

000 
WGUS73 KDMX 242255
FFSDMX
IAC009-015-027-049-073-077-121-153-250000-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
550 PM CDT MON MAY 24 2004

...A FLASH FLOOD WARNING CONTINUES FOR
DALLAS...MADISON UNTIL 11 PM
CARROLL...GREENE...AUDUBON...GUTHRIE UNTIL 1115 PM
BOONE UNTIL 1130 PM
POLK UNTIL 1145 PM

AT 550 PM...WEATHER SPOTTERS REPORTED FLASH FLOODING IN 
AUDUBON...DALLAS...MADISON...AND CARROLL COUNTIES THIS EVENING.  
ADDITIONAL HEAVY RAINS WILL CONTINUE.

THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA...AND
ADDITIONAL RAIN WILL CONTINUE TO 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 THE SMALL STREAMS AND CREEKS.

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 4185 9336 4154 9337 4151 9383 4121 9386
          4118 9421 4151 9433 4155 9503 4219 9508
          4219 9377 4187 9374

$$

FORSTER

000 
WGUS73 KDMX 250000
FFSDMX
IAC009-015-027-049-073-077-121-153-250100-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
700 PM CDT MON MAY 24 2004

...A FLASH FLOOD WARNING CONTINUES FOR
DALLAS...MADISON UNTIL 11 PM
CARROLL...GREENE...AUDUBON...GUTHRIE UNTIL 1115 PM
BOONE UNTIL 1130 PM
POLK UNTIL 1145 PM

AT 655 PM...WEATHER SPOTTERS REPORTED FLASH FLOODING IN 
AUDUBON...BOONE...DALLAS...MADISON...POLK AND CARROLL COUNTIES THIS 
EVENING.  ADDITIONAL HEAVY RAINS WILL CONTINUE.

THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA...AND
ADDITIONAL RAIN WILL CONTINUE TO 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 THE SMALL STREAMS AND CREEKS.

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 4185 9336 4154 9337 4151 9383 4121 9386
          4118 9421 4151 9433 4155 9503 4219 9508
          4219 9377 4187 9374

$$

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, 5:04 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, 6:38 PM CDT	Flash Flood Warning	DMX	Marion	18 hr
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.