Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 9, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at May 21, 2004, 9:57 PM CDT for Chickasaw County, Floyd County, Iowa. It was in force for 3 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 21, 2004, 9:57 PM CDT (02:57 UTC)
- Expired
- May 22, 2004, 1:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
Counties Chickasaw County, IA, Floyd County, IA
The radar
The La Crosse radar (KARX), 143 km from the middle of the area, began a volume at 03:01 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
Minneapolis, MN (KMPX), launched 00:00Z, 3.0 hours before the alert went out and 211 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 KARX 220257 FFWARX IAC037-067-220600- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 957 PM CDT FRI MAY 21 2004 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WARNING FOR... FLOYD COUNTY IN NORTH CENTRAL IOWA CHICKASAW COUNTY IN NORTHEAST IOWA * UNTIL 100 AM CDT * AT 957 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY RAIN 4 MILES SOUTHEAST OF RUDD...OR ABOUT 8 MILES WEST OF CHARLES CITY. ESTIMATES FROM RADAR INDICATED THAT NEARLY 1 INCH OF RAIN HAS FALLEN DURING THE PAST HOUR OVER THE WARNED AREA. THE STORMS PRODUCING THE VERY HEAVY RAINFALL WERE MOVING EAST AT 40 MPH. THIS WARNING EXTENDS THE PREVIOUS FLASH FLOOD WARNING ISSUED FOR FLOYD AND CHICKASAW COUNTIES. * SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...CHARLES CITY... FLOYD...IONIA...NEW HAMPTON...RIVER RANCH CAMPGROUND...COUNTY ROADS B 28 AND V 18 AND HIGHWAY 18 AND COUNTY V 18. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO FORGE FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. IF YOUR VEHICLE STALLS... ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. LAT...LON 4315 9293 4293 9284 4298 9221 4318 9230 $$ RABERDING
2 follow-up statements
000 WGUS73 KARX 220408 FFSARX IAC037-067-220600- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1107 PM CDT FRI MAY 21 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR FLOYD AND CHICKASAW COUNTIES UNTIL 100 AM CDT... AT 1102 PM CDT LAW ENFORCEMENT OFFICIALS IN FLOYD COUNTY REPORTED SEVERAL WASHED OUT SECONDARY ROADS. ALSO...WATER WAS REPORTED OVER ROADS IN CHARLES CITY. IN CHICKASAW COUNTY...LAW ENFORCEMENT OFFICIALS WATER OVER ROADS AND BRIDGES EAST OF FREDERICKSBURG. ALSO...IS WAS REPORTED THAT 40 HOUSES HAD WATER IN THEIR BASEMENTS IN FREDERICKSBURG. AT 1105 PM CDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO SHOW MORE THUNDERSTORMS MOVING OVER THE WARNED AREA. THIS WILL CONTINUE TO AFFECT THE WARNED AREA THROUGH 100 AM. SOME LOCATIONS WHICH MAY BE AFFECTED INCLUDE...CHARLES CITY... FLOYD...FREDERICKSBURG...IONIA...LAWLER...MARBLE ROCK AND NASHUA. THIS IS A SERIOUS SITUATION. ADDITIONAL RAINFALL WILL ONLY MAKE THE FLOODING WORSE. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. $$ KRC &
000 WGUS73 KARX 220501 FFSARX IAC037-067-220600- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1201 AM CDT SAT MAY 22 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR CHICKASAW AND FLOYD COUNTIES... AT 1158 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED MORE THUNDERSTORMS ACROSS NORTH CENTRAL IOWA MOVING TOWARD THE AREA. ADDITIONAL RAINFALL AMOUNTS BETWEEN 1 TO 2 INCHES CAN BE EXPECTED WITH THE NEXT ROUND OF STORMS. THE STORMS PRODUCING THE VERY HEAVY RAINFALL WERE MOVING EAST AT 30 MPH. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...CHARLES CITY...FLOYD... FREDERICKSBURG...IONIA...MARBLE ROCK...NEW HAMPTON AND ROCKFORD. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. LAT...LON 4294 9297 4295 9212 4320 9215 4320 9296 $$ RABERDING
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 7:00 PM CDT | Flash Flood Warning | ARX | Chickasaw, Floyd | 3 hr |
| May 21, 7:25 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 35 min |
| May 21, 7:41 PM CDT | Flash Flood Warning | ARX | Allamakee, Winneshiek | 3 hr |
| May 21, 8:35 PM CDT | Flash Flood Warning | ARX | Clayton, Fayette | 3 hr |
| May 21, 9:08 PM CDT | Flash Flood Warning | ARX | Howard, Mitchell | 3 hr |
| May 21, 9:09 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 51 min |
| May 21, 10:45 PM CDT | Flash Flood Warning | ARX | Allamakee, Winneshiek | 3 hr |
| May 21, 11:28 PM CDT | Flash Flood Warning | ARX | Clayton, Fayette | 3 hr |
| May 22, 12:11 AM CDT | Flash Flood Warning | ARX | Howard, Mitchell | 3 hr |
| May 22, 12:18 AM CDT | Severe Thunderstorm Warning | ARX | Floyd | 57 min |
| May 22, 12:59 AM CDT | Flash Flood Warning | ARX | Chickasaw, Floyd | 3 hr |
| May 22, 2:07 AM CDT | Severe Thunderstorm Warning | ARX | Fayette | 38 min |
| May 22, 2:16 AM CDT | Severe Thunderstorm Warning | ARX | Clayton | 44 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.