Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 39, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jul 9, 2004, 5:19 AM CDT for Clarke County, Iowa. It was in force for 4 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
- Jul 9, 2004, 5:19 AM CDT (10:19 UTC)
- Expired
- Jul 9, 2004, 9:15 AM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
County Clarke County, IA
The radar
The Des Moines radar (KDMX), 75 km from the middle of the area, began a volume at 10:19 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 00:00Z, 10.3 hours before the alert went out and 222 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.
- Mixed-layer CAPE
- 2065 J/kg
- Mixed-layer CIN
- -291 J/kg
- Mixed-layer LCL
- 575 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 091020 FFWDMX IAC039-091415- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 519 AM CDT FRI JUL 9 2004 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... CLARKE COUNTY IN SOUTH CENTRAL IOWA * UNTIL 915 AM CDT * AT 510 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS HAD PASSED OVER THE WARNING AREA. * SLOW MOVING THUNDERSTORMS PRODUCED TORRENTIAL RAINFALL OVER CLARKE COUNTY...ESPECIALLY NORTHWESTERN PORTIONS FROM MURRAY NORTH AND NORTHEASTWARD. NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES SHOW THAT ANYWHERE FROM 2.5 TO 3.5 INCHES OF RAIN MAY HAVE FALLEN IN THE PAST TWO TO THREE HOURS. THIS WILL LIKELY PRODUCE FLASH FLOODING ALONG HANNER CREEK...AS WELL AS THE SOUTH RIVER AND OTHER TRIBUTARIES. OTHER WARNING LOCATIONS INCLUDE...MURRAY...OSCEOLA...AND WOODBURN. 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 4116 9357 4091 9356 4091 9401 4115 9401 $$ SMALL
2 follow-up statements
000 WGUS73 KDMX 091127 FFSDMX IAC039-091430- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 627 AM CDT FRI JUL 9 2004 ...A FLASH FLOOD WARNING CONTINUES FOR CLARKE COUNTY UNTIL 915 AM... AT 624 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS WITH MODERATE TO HEAVY RAINS OVER OSCEOLA...OR ABOUT 39 MILES SOUTH OF DES MOINES...MOVING NORTHEAST AT 35 MPH. THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING OVER THE WARNING AREA WHERE HEAVY RAINS PREVIOUSLY FELL...RESULTING IN EXCESSIVE RAINFALL. RAINFALL RATES WILL CONTINUE TO EXCEED AN INCH PER HOUR AT TIMES...WITH TOTAL AMOUNTS APPROACHING 4 INCHES ACROSS MUCH OF THE NORTHWEST QUARTER OF THE COUNTY. THIS WILL LIKELY PRODUCE FLASH FLOODING ALONG HANNER CREEK...AS WELL AS THE SOUTH RIVER AND ITS TRIBUTARIES. FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4115 9400 4091 9400 4091 9356 4115 9357 $$ SMALL
000 WGUS73 KDMX 091341 FFSDMX IAC039-091430- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 840 AM CDT FRI JUL 9 2004 ...FLASH FLOOD WARNING EXPIRING AT 915 AM FOR CLARKE COUNTY... THE FLASH FLOOD WARNING FOR CLARKE COUNTY WILL BE ALLOWED TO EXPIRE AT 915 AM. AT 835 AM CDT...RAIN HAS MOVED OUT OF THE COUNTY. RADAR ESTIMATES OF THREE TO FIVE INCHES OF RAIN HAVE FALLEN OVER THE NORTHWEST THIRD OF THE COUNTY...ESSENTIALLY WEST OF HIGHWAY 69 AND NORTH OF HIGHWAY 34. HIGHEST ESTIMATES OCCURRED IN MADISON AND WASHINGTON TOWNSHIPS...WHICH FEED INTO THE SOUTH RIVER AND SQUAW CREEK BASINS. COUNTY ROADS MAY BE UNDERWATER IN AND AROUND THOSE TOWNSHIPS UNTIL SMALL STREAMS RECEDE OVER THE NEXT HOUR OR SO. FIELD RUNOFF SHOULD BE GRADUALLY DECLINING AS WELL. YOU CAN EXCEPT A SIGNIFICANT RISE ON THE UPPER REACHES OF THE SOUTH RIVER AS THIS WATER MOVES DOWNSTREAM. COUNTY PERSONNEL WILL BE ASSESSING ANY DAMAGE TODAY. IF YOU ENCOUNTER DAMAGE ROADS OR FLOWING WATER OVER A ROADWAY...PLEASE RELAY THE INFORMATON TO YOUR LOCAL LAW ENFORCEMENT. LAT...LON 4115 9400 4091 9400 4091 9356 4115 9357 $$ MYERS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 3:19 AM CDT | Severe Thunderstorm Warning | DMX | Cass | 41 min |
Nearby
Flash Flood Warnings in Iowa, 2004Every 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.