Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 9, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at May 21, 2004, 10:00 PM CDT for Kossuth County, Winnebago County, Worth County, Iowa. It was in force for 18 hr. 2 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, 10:00 PM CDT (03:00 UTC)
- Expired
- May 22, 2004, 4:00 PM CDT
- In force
- 18 hr
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Kossuth County, IA, Winnebago County, IA, Worth County, IA
The radar
The Des Moines radar (KDMX), 170 km from the middle of the area, began a volume at 03:02 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 22, 12:20 AM CDT | FLASH FLOOD | 2 E Hanlontown, IA | WATER FLOWING OVER COUNTY ROADS ADJACENT TO I-35 IN SOUTHERN 10 MILES OF COUNTY. |
| May 22, 12:20 AM CDT | FLASH FLOOD | Joice, IA | MAIN STREET FLOODED. |
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 00:00Z, 3.0 hours before the alert went out and 177 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 215 m²/s²
- 0-3 km storm-relative helicity
- 257 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KDMX 220303
FFWDMX
IAC109-189-195-220900-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1000 PM CDT FRI MAY 21 2004
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
KOSSUTH COUNTY IN NORTH CENTRAL IOWA
WINNEBAGO COUNTY IN NORTH CENTRAL IOWA
WORTH COUNTY IN NORTH CENTRAL IOWA
* UNTIL 400 AM
* AT 1000 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS IN THE WARNING AREA.
* THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING...RESULTING IN
EXCESSIVE RAINFALL. RAINFALL RATES WILL AVERAGE 1 TO 2 INCHES PER
HOUR. THIS WILL PRODUCE FLASH FLOODING OVER ROADS IN LOW LYING AREAS
OR LOCATIONS THAT NORMALLY COLLECT WATER DURING HEAVY RAINS.
OTHER WARNING LOCATIONS INCLUDE...
ALGONA...ALGONA MUNICIPAL AIRPORT...BANCROFT...BUFFALO CENTER...
BURT...FENTON...FERTILE...GRAFTON...HANLONTOWN...JOICE...KENSETT...
LAKE MILLS...LAKE MILLS MUNICIPAL AIRPORT...LAKOTA...LEDYARD...
LELAND...LONE ROCK...MANLY...NORTHWOOD...NORTHWOOD MUNICIPAL
AIRPORT...RAKE...SCARVILLE...SWEA CITY...THOMPSON...TITONKA AND
WHITTEMORE
FLASH FLOODS OCCUR QUICKLY. DO NOT DRIVE INTO WATER COVERED ROADS.
LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF
THE ROAD.
LAT...LON 4349 9305 4325 9308 4325 9401 4293 9402
4295 9445 4349 9444
$$
KULA4 follow-up statements
000 WGUS73 KDMX 220349 FFSDMX IAC109-189-195-220900- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1047 PM CDT FRI MAY 21 2004 ...A FLASH FLOOD WARNING CONTINUES FOR WINNEBAGO...WORTH AND NORTHERN KOSSUTH COUNTIES UNTIL 400 AM... AT 1047 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED ADDITIONAL THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS OVER BANCROFT...OR ABOUT 50 MILES EAST OF SPENCER...MOVING NORTHEAST AT 35 MPH. THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL BE... NEAR BUFFALO CENTER AROUND 1100 PM... 6 MILES NORTHWEST OF THOMPSON AROUND 1110 PM AND 4 MILES NORTHWEST OF SCARVILLE AROUND 1120 PM. THUNDERSTORMS ARE CONTINUOUSLY REDEVELOPING OVER THE WARNING AREA...RESULTING IN EXCESSIVE RAINFALL. RAINFALL RATES WILL AVERAGE 1 TO 2 INCHES PER HOUR PRODUCING FLASH FLOODING. FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4349 9445 4327 9444 4327 9305 4350 9307 $$ KULA
000 WGUS73 KDMX 220704 CCA FFSDMX IAC109-189-195-220900- FLASH FLOOD STATEMENT...CORRECTED HEADER TIME NATIONAL WEATHER SERVICE DES MOINES IA 145 AM CDT SAT MAY 22 2004 ...A FLASH FLOOD WARNING CONTINUES FOR WINNEBAGO...WORTH AND NORTHERN KOSSUTH COUNTIES UNTIL 400 AM... AT 140 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED NUMEROUS SHOWERS AND A FEW THUNDERSTORMS OVER FAR NORTHERN IOWA. THIS RAINFALL WILL CONTINUE TO MOVE EAST AT ABOUT 40 MPH. RAINFALL RATES WILL AVERAGE AROUND A QUARTER OF AN INCH PER HOUR. THE RAINFALL WILL DIMINISH OVER FAR NORTHERN IOWA BY AROUND 330 AM. ALTHOUGH THE RAINFALL RATES HAVE DIMINISHED...RUNOFF FROM EARLIER HEAVIER RAIN WILL CONTINUE DUE TO THE SATURATED GROUND. EXPECT WATER LEVELS TO REMAIN HIGH WITH FLASH FLOODING LIKELY. BE ESPECIALLY CAUTIOUS DRIVING AT NIGHT WHEN DANGERS OF FLASH FLOODING ARE HARDER TO SEE. 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. IF YOU LIVE IN A FLASH FLOOD PRONE AREA...MONITOR WATER LEVELS CLOSELY. LAT...LON 4349 9445 4327 9444 4327 9305 4350 9307 $$ JAW
000 WGUS73 KDMX 220825 FFSDMX IAC109-189-195-220900- FLASH FLOOD STATEMENT...CORRECTED HEADER TIME NATIONAL WEATHER SERVICE DES MOINES IA 310 AM CDT SAT MAY 22 2004 ...A FLASH FLOOD WARNING CONTINUES FOR WINNEBAGO...WORTH AND NORTHERN KOSSUTH COUNTIES UNTIL 400 AM... AT 310 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LIGHT TO MODERATE RAIN CONTINUING OVER FAR NORTHERN IOWA. MODERATE RAIN PERSISTED OVER WORTH COUNTY. THE RAIN WAS LIGHT FURTHER WEST INTO WINNEBAGO AND NORTHERN KOSSUTH COUNTY. RAINFALL RATES WILL AVERAGE A QUARTER INCH PER HOUR OR LESS. THE RAIN WILL PERSIST THROUGH MUCH OF THE EARLY MORNING HOURS BUT NO ADDITION HEAVY RAINFALL RATES ARE EXPECTED. SOME RUNOFF FROM EARLIER HEAVIER RAIN WILL CONTINUE DUE TO THE SATURATED GROUND. INCREASES IN WATER LEVELS WILL SLOW...ALTHOUGH MAJOR STREAMS...CREEKS...AND RIVERS WILL CONTINUE TO SEE WATER LEVELS RISE. BE ESPECIALLY CAUTIOUS DRIVING AT NIGHT WHEN DANGERS OF FLASH FLOODING ARE HARDER TO SEE. FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. IF YOU LIVE IN A FLASH FLOOD PRONE AREA...MONITOR WATER LEVELS CLOSELY. LAT...LON 4349 9445 4327 9444 4327 9305 4350 9307 $$ JAW
000 WGUS73 KDMX 220918 FFSDMX IAC109-189-195-220945- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 415 AM CDT SAT MAY 22 2004 ...A FLASH FLOOD WARNING HAS EXPIRED FOR WINNEBAGO...WORTH AND NORTHERN KOSSUTH COUNTIES... AT 410 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AREAS OF LIGHT TO MODERATE RAIN CONTINUING OVER FAR NORTHERN IOWA. THE RAIN WILL DIMINISH BY 6 AM. NO ADDITIONAL HEAVY RAINFALL IS EXPECTED THROUGH THE MORNING. ALTHOUGH THE FLASH FLOOD WARNING HAS EXPIRED...SOME WATER WILL REMAIN STANDING IN MAINLY AGRICULTURAL AREAS. RIVER AND CREEK LEVELS WILL REMAIN HIGH. IF ANY WATER REMAINS STANDING ON ROADS...MOTORISTS ARE REMINDED NOT TO DRIVE INTO IT. LAT...LON 4349 9445 4327 9444 4327 9305 4350 9307 $$ JAW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 7:16 PM CDT | Tornado Warning | DMX | Wright | 29 min |
| May 21, 7:31 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 44 min |
| May 21, 7:36 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 54 min |
| May 21, 7:41 PM CDT | Flash Flood Warning | DMX | Bremer, Butler | 17 hr |
| May 21, 7:46 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 14 min |
| May 21, 8:12 PM CDT | Tornado Warning | DMX | Bremer | 48 min |
| May 21, 8:59 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 31 min |
| May 21, 10:39 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 51 min |
| May 21, 11:10 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Kossuth | 50 min |
| May 21, 11:16 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 44 min |
| May 21, 11:54 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock | 51 min |
| May 22, 12:07 AM CDT | Tornado Warning | DMX | Hamilton | 38 min |
| May 22, 6:09 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 51 min |
| May 22, 6:35 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 25 min |
| May 22, 6:40 PM CDT | Severe Thunderstorm Warning | DMX | Carroll | 50 min |
| May 22, 6:41 PM CDT | Tornado Warning | DMX | Boone | 34 min |
| May 22, 6:51 PM CDT | Tornado Warning | DMX | Carroll | 39 min |
| May 22, 6:55 PM CDT | Severe Thunderstorm Warning | DMX | Story | 50 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.