Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 7, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at May 21, 2004, 9:08 PM CDT for Howard County, Mitchell 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, 9:08 PM CDT (02:08 UTC)
- Expired
- May 22, 2004, 12:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
Counties Howard County, IA, Mitchell County, IA
The radar
The La Crosse radar (KARX), 130 km from the middle of the area, began a volume at 02:11 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, 2.1 hours before the alert went out and 185 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 220210 FFWARX IAC089-131-220515- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 908 PM CDT FRI MAY 21 2004 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WARNING FOR... MITCHELL COUNTY IN NORTH CENTRAL IOWA HOWARD COUNTY IN NORTHEAST IOWA * UNTIL 1215 AM CDT * AT 910 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER OSAGE SPRING PARK...OR ABOUT 3 MILES SOUTHWEST OF OSAGE. ESTIMATES FROM RADAR INDICATED THAT NEARLY 1 INCH OF RAIN HAS FALLEN DURING THE PAST HOUR OVER THE WARNED AREA. ADDITIONAL STORMS WERE LOCATED BACK OVER NORTH CENTRAL IOWA. ALL OF THE STORMS WERE MOVING EAST AT 30 MPH. * SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...CRESCO...ELMA...LIME SPRINGS...OSAGE...RICEVILLE...ST. ANSGAR AND STACYVILLE. 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 4323 9302 4323 9210 4348 9210 4350 9302 $$ RABERDING
2 follow-up statements
000 WGUS73 KARX 220317 FFSARX IAC089-131-220515- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1016 PM CDT FRI MAY 21 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR HOWARD AND MITCHELL COUNTIES... AT 1014 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS THE AREA. LAW ENFORCEMENT IN HOWARD COUNTY REPORT MANY SECONDARY ROADS CLOSED DUE TO HIGH WATER. MORE SHOWERS AND THUNDERSTORMS ARE EXPECTED TO MOVE ACROSS THE AREA...WITH RAINFALL RATES OF AN INCH PER HOUR IN THE STRONGER STORMS. THE STORMS PRODUCING THE VERY HEAVY RAINFALL WERE MOVING EAST AT 40 MPH. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...CRESCO...ELMA...LIME SPRINGS...OSAGE...RICEVILLE...ST. ANSGAR AND STACYVILLE. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO FORGE FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. IF YOUR VEHICLE STALLS... ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. LAT...LON 4323 9302 4323 9210 4348 9210 4350 9302 $$ RABERDING
000 WGUS73 KARX 220412 FFSARX IAC089-131-220515- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1111 PM CDT FRI MAY 21 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR HOWARD AND MITCHELL COUNTIES... AT 1111 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER RICEVILLE...OR ABOUT 14 MILES NORTHEAST OF OSAGE. ESTIMATES FROM RADAR INDICATED THAT NEARLY 2 TO 3 INCHES OF RAIN HAS FALLEN DURING THE PAST 3 HOURS OVER THE WARNED AREA. THE STORMS PRODUCING THE VERY HEAVY RAINFALL WERE MOVING EAST AT 35 MPH. SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...CRESCO...ELMA...LIME SPRINGS...OSAGE...ST. ANSGAR...STACYVILLE AND HAYDEN PRAIRIE. 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 4323 9302 4323 9210 4348 9210 4350 9302 $$ 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, 9:09 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.