Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 7, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at May 21, 2004, 6:09 PM CDT for 7 counties in Iowa. It was in force for 120 days. 10 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 21, 2004, 6:09 PM CDT (23:09 UTC)
- Expired
- Sep 18, 2004, 9:15 AM CDT
- In force
- 120 days
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Adams County, IA, Cerro Gordo County, IA, Franklin County, IA, Hancock County, IA, Humboldt County, IA, Kossuth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 145 km from the middle of the area, began a volume at 23:12 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 21, 6:15 PM CDT | FLOOD | Algona, IA | ROADS UNDERWATER THROUGHOUT SOUTHERN KOSSUTH COUNTY. 3 FEET OF WATER OVER SEVERAL ROADS. CARS STALLED ALONG HIGHWAY 18 IN ALGONA. |
| May 21, 7:26 PM CDT | FLOOD | 6 Sw Mason City, IA | WATER COVERING ROADS. VISIBLE FROM INTERSTATE 35. |
| May 21, 7:33 PM CDT | FLOOD | Goodell, IA | WATER COVERING ROADS AND FIELDS. |
| May 21, 8:01 PM CDT | FLOOD | Goodell, IA | WATER OVER 130TH STREET AT HIGHWAY 69. |
| May 21, 8:03 PM CDT | FLOOD | S Mason City, IA | WATER OVER ROADS OVER SOUTHERN PART OF CERRO GORDO COUNTY. ALONG HIGHWAY 65, 2 TO 3 INCHES DEEP AND CLIMBING BETWEEN THE AVENUE OF THE SAINTS AND ROCKWELL. |
| May 21, 8:03 PM CDT | HEAVY RAIN 2.5 | N Rockwell, IA | IN LESS THAN ONE HOUR. |
| May 21, 11:20 PM CDT | FLASH FLOOD | Rockwell, IA | NUMEROUS ROADS FLOODED WITH AFFECTED AREA EXPANDING INTO SOUTHWEST PORTION OF COUNTY. SOME GRAVEL ROADS WASHED OUT IN PAST HOUR. |
| May 21, 11:35 PM CDT | FLASH FLOOD | Mason City, IA | EVACUATIONS OCCURRING DUE TO RAPID FLOODING. DETAILS UNKNOWN. |
| Jun 11, 6:08 PM CDT | FLASH FLOOD | Burt, IA | WATER HAS REACHED CENTER LINE OF HIGHWAY 169. |
| Jun 16, 4:38 PM CDT | FLASH FLOOD | Mason City, IA | FIFTEEN ROADS WERE REPORTED FLOODED. WILLOW CREEK IS OUT OF ITS BANKS AND FLOODING EAST PARK. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 202 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 732 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 321 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 212313 FFWDMX IAC033-069-081-091-109-197-220515- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 609 PM CDT FRI MAY 21 2004 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... CERRO GORDO COUNTY IN NORTH CENTRAL IOWA THIS INCLUDES THE CITY OF MASON CITY NORTHERN FRANKLIN COUNTY IN NORTH CENTRAL IOWA HANCOCK COUNTY IN NORTH CENTRAL IOWA HUMBOLDT COUNTY IN NORTH CENTRAL IOWA SOUTHERN KOSSUTH COUNTY IN NORTH CENTRAL IOWA NORTHERN WRIGHT COUNTY IN NORTH CENTRAL IOWA * UNTIL 1215 AM SATURDAY MORNING * AT 607 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS IN OR MOVING INTO THE WARNING AREA. * THE GROUND IS ALREADY SATURATED BY RAINFALL...AND ADDITIONAL RAIN WILL PRODUCE SIGNIFICANT RUNOFF. THUNDERSTORMS ARE EXPECTED TO PRODUCE RAINFALL RATES OF 2 TO 3 INCHES PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG LOW LYING GRAVEL ROADS...AND FLOOD PRONE SMALL STREAMS AND CREEKS. OTHER WARNING LOCATIONS INCLUDE... ALEXANDER...ALGONA...BELMOND...BODE...BRADGATE...BRITT.. .BURT...CLARION...CLEAR LAKE...CORWITH...COULTER...CRYSTAL LAKE...FENTON...GARNER...GOLDFIELD...GOODELL...HAMPTON...HUMBOLDT ...KANAWHA...KLEMME...LATIMER...LIVERMORE. ..LONE ROCK...MESERVEY...OTTOSEN...PLYMOUTH...RENWICK...ROCK FALLS...ROCKWELL...ROWAN...RUTLAND...SHEFFIELD...SWALEDALE...THORNTON ...TITONKA...VENTURA...WESLEY...WHITTEMORE AND WODEN 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 4324 9304 4273 9306 4271 9443 4324 9443 $$ KULA
1 follow-up statement
000 WGUS53 KDMX 180815 FFWDMX IAC003-181415- /X.NEW.KDMX.FF.W.0007.040918T0811Z-040918T1415Z/ /0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 311 AM CDT SAT SEP 18 2004 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... ADAMS COUNTY IN SOUTHWEST IOWA. * UNTIL 915 AM CDT. * AT 307 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. DOPPLER RADAR ESTIMATED THREE TO FIVE INCHES OF RAIN HAS FALLEN ACROSS PORTIONS OF THE COUNTY. * SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CORNING...CARBON...CORNING MUNICIPAL AIRPORT...NODAWAY AND PRESCOTT. PERSONS THAT LIVE ALONG THE BROWN BRANCH...THE MOUNT ZION BRANCH AND KEMP CREEK SHOULD MONITOR THE POTENTIAL FOR SIGNIFICANT RISES ALONG THESE STREAMS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DES MOINES. LAT...LON 4115 9451 4092 9450 4092 9491 4115 9492 $$ DONAVON
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 2:18 AM CDT | Severe Thunderstorm Warning | DMX | Crawford | 42 min |
| May 21, 2:37 AM CDT | Severe Thunderstorm Warning | DMX | Sac | 53 min |
| May 21, 4:32 AM CDT | Severe Thunderstorm Warning | DMX | Franklin | 28 min |
| May 21, 5:23 AM CDT | Severe Thunderstorm Warning | DMX | Bremer | 37 min |
| May 21, 10:59 AM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 61 min |
| May 21, 11:08 AM CDT | Severe Thunderstorm Warning | DMX | Hancock | 67 min |
| May 21, 11:40 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 50 min |
| May 21, 12:20 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 40 min |
| May 21, 12:29 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 16 min |
| May 21, 12:50 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 40 min |
| May 21, 1:17 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 58 min |
| May 21, 1:25 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 35 min |
| May 21, 1:27 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 48 min |
| May 21, 1:55 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 35 min |
| May 21, 2:02 PM CDT | Tornado Warning | DMX | Grundy | 43 min |
| May 21, 2:05 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Wright | 25 min |
| May 21, 2:06 PM CDT | Tornado Warning | DMX | Hamilton | 39 min |
| May 21, 2:20 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 55 min |
| May 21, 2:28 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Wright | 47 min |
| May 21, 2:39 PM CDT | Tornado Warning | DMX | Hardin | 51 min |
| May 21, 2:43 PM CDT | Tornado Warning | DMX | Black Hawk | 57 min |
| May 21, 2:45 PM CDT | Tornado Warning | DMX | Grundy | 45 min |
| May 21, 3:06 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 39 min |
| May 21, 3:07 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 23 min |
| May 21, 3:27 PM CDT | Tornado Warning | DMX | Grundy | 48 min |
| May 21, 3:35 PM CDT | Tornado Warning | DMX | Black Hawk | 40 min |
| May 21, 3:38 PM CDT | Flash Flood Warning | DMX | Black Hawk, Palo Alto, Pocahontas | 119 days |
| May 21, 3:44 PM CDT | Tornado Warning | DMX | Marshall, Tama | 31 min |
| May 21, 4:16 PM CDT | Tornado Warning | DMX | Tama | 29 min |
| May 21, 5:01 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 44 min |
| May 21, 5:27 PM CDT | Flash Flood Warning | DMX | Palo Alto, Pocahontas, Taylor | 120 days |
| May 21, 5:27 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock | 48 min |
| May 21, 5:30 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 45 min |
| May 21, 5:47 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 43 min |
| May 21, 5:52 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin | 53 min |
| May 21, 5:54 PM CDT | Tornado Warning | DMX | Palo Alto, Pocahontas | 51 min |
| May 21, 6:15 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 45 min |
| May 21, 6:15 PM CDT | Tornado Warning | DMX | Humboldt, Kossuth | 45 min |
| May 21, 6:22 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 53 min |
| May 21, 6:36 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 24 min |
| May 21, 6:41 PM CDT | Tornado Warning | DMX | Humboldt | 34 min |
| May 21, 6:54 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 36 min |
| May 21, 6:54 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 51 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.