Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 5, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at May 21, 2004, 8:35 PM CDT for Clayton County, Fayette County, Iowa. It was in force for 3 hr. 4 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, 8:35 PM CDT (01:35 UTC)
- Expired
- May 21, 2004, 11:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
Counties Clayton County, IA, Fayette County, IA
The radar
The La Crosse radar (KARX), 107 km from the middle of the area, began a volume at 01:36 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, 9:01 PM CDT | FLASH FLOOD | Clermont, IA | FLOODING REPORTED IN THE CITY |
| May 21, 9:01 PM CDT | FLASH FLOOD | Clermont, IA | FLOODING REPORTED IN THE CITY |
| May 21, 9:01 PM CDT | FLASH FLOOD | Clermont, IA | FLOODING REPORTED IN THE CITY |
| May 21, 9:01 PM CDT | FLASH FLOOD | Clermont, IA | FLOODING REPORTED IN THE CITY |
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, 1.6 hours before the alert went out and 264 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 220136 FFWARX IAC043-065-220430- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 835 PM CDT FRI MAY 21 2004 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WARNING FOR... FAYETTE COUNTY IN NORTHEAST IOWA CLAYTON COUNTY IN NORTHEAST IOWA * UNTIL 1130 PM CDT * AT 835 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY RAIN EXTENDING FROM 6 MILES NORTH OF WEST UNION TO 8 MILES WEST OF OELWEIN. ESTIMATES FROM RADAR INDICATED THAT NEARLY 1 INCH OF RAIN HAS FALLEN DURING THE PAST HOUR JUST WEST OF THE WARNED AREA. THIS RAIN WILL MOVE OVER GROUNDS THAT ARE ALREADY SATURATED. THE STORMS PRODUCING THE VERY HEAVY RAINFALL WERE MOVING EAST AT 25 MPH. * SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...ARLINGTON... CLERMONT...ELGIN...ELKADER...FARMERSBURG...FAYETTE AND GARNAVILLO. 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 4307 9190 4271 9209 4273 9124 4306 9124 $$ RIECK
2 follow-up statements
000 WGUS73 KARX 220215 FFSARX IAC043-065-220430- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 915 PM CDT FRI MAY 21 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR CLAYTON AND FAYETTE COUNTIES... AT 912 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY RAIN 4 MILES SOUTH OF ELGIN...OR ABOUT 11 MILES SOUTHEAST OF WEST UNION. ESTIMATES FROM RADAR INDICATED THAT NEARLY 1 INCH OF RAIN HAS FALLEN DURING THE PAST HOUR OVER THE WARNED AREA. THE STORMS PRODUCING THE VERY HEAVY RAINFALL WERE MOVING EAST AT 45 MPH. LAW ENFORCEMENT IN FAYETTE COUNTY REPORTS WATER OVER THE ROAD AT HIGHWAY 18 AND X AVENUE. ALSO THE LITTLE TURKEY RIVER WAS OUT OF ITS BANKS IN WAUCOMA AND ST. LUCAS. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...ARLINGTON...CLERMONT... ELKADER...FARMERSBURG...FAYETTE...GARNAVILLO AND HAWKEYE. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO FORGE FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. IF YOUR VEHICLE STALLS... ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. LAT...LON 4307 9190 4271 9209 4273 9124 4306 9124 $$ RABERDING
000 WGUS73 KARX 220337 FFSARX IAC043-065-220430- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1037 PM CDT FRI MAY 21 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR CLAYTON AND FAYETTE COUNTIES... AT 1033 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER FAYETTE...OR ABOUT 8 MILES SOUTH OF WEST UNION. ADDITIONAL THUNDERSTORMS CONTINUE TO DEVELOP TO THE WEST OF THE AREA. ADDITIONAL RAINFALL AMOUNTS BETWEEN 1 AND 2 INCHES CAN BE EXPECTED THROUGH 1130 PM. LAW ENFORCEMENT IN FAYETTE AND CLAYTON COUNTIES STATES HIGHWAY 18 NEAR HAWKEYE WAS UNDER WATER AND THERE WAS STREET FLOODING IN MCGREGOR. THE STORMS PRODUCING THE VERY HEAVY RAINFALL WERE MOVING EAST AT 40 MPH. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...ARLINGTON...CLERMONT... ELGIN...ELKADER...FARMERSBURG...GARNAVILLO AND HAWKEYE. 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 4307 9190 4271 9209 4273 9124 4306 9124 $$ 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, 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, 9:57 PM CDT | Flash Flood Warning | ARX | Chickasaw, Floyd | 3 hr |
| 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.