Alert archive / Iowa / Flash Flood Warnings in 2003
Flash Flood Warning 1, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at May 10, 2003, 9:05 PM CDT for Clayton 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 10, 2003, 9:05 PM CDT (02:05 UTC)
- Expired
- May 11, 2003, 12:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
County Clayton County, IA
The radar
The La Crosse radar (KARX), 108 km from the middle of the area, began a volume at 02:05 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
Davenport, (KDVN), launched 00:00Z, 2.1 hours before the alert went out and 154 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
- 1566 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 910 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 234 m²/s²
- 0-3 km storm-relative helicity
- 259 m²/s²
- Significant tornado parameter
- 2.8
- Supercell composite
- 12.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KARX 110206 FFWARX IAC043-110500- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 905 PM CDT SAT MAY 10 2003 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WARNING FOR... CLAYTON COUNTY IN NORTHEAST IOWA * UNTIL MIDNIGHT CDT * AT 905 PM CDT...LAW ENFORCEMENT OFFICIALS REPORTED FLOODING ACROSS PARTS OF CLAYTON COUNTY. NATIONAL WEATHER SERVICE RADAR INDICATES THAT FROM 2 TO 4 INCHES OF RAIN HAS ALREADY FALLEN... AND ADDITIONAL RAINS ARE EXPECTED THROUGH 10 OR 11 PM. * SOME LOCATIONS WHICH MAY BE AFFECTED INCLUDE... ELKADER... FARMERSBURG... GARNAVILLO... GUTTENBERG... STRAWBERRY POINT... VOLGA... 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. THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUD-SLIDES IN STEEP TERRAIN. PERSONS IN THE WARNED AREA SHOULD BE PREPARED TO ACT QUICKLY TO AVOID THESE HAZARDS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS. LAT...LON 4299 9117 4264 9105 4265 9161 4303 9161 $$ MW &
2 follow-up statements
000 WGUS73 KARX 110358 FFSARX IAC043-110445- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1058 PM CDT SAT MAY 10 2003 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR CLAYTON COUNTY UNTIL MIDNIGHT CDT... AT 1045 PM...SPOTTERS REPORTED WATER TO BE OVER ROADS WEST OF EDGEWOOD IN SOUTHERN CLAYTON COUNTY. LAW ENFORCEMENT OFFICIALS ALSO REPORTED WATER OVER JASMINE ROAD...NORTH OF GARBER. AT 1058 PM...NATIONAL WEATHER SERVICE RADAR INDICATED THAT MOST OF THE RAIN HAD MOVED EAST AND NORTH OF CLAYTON COUNTY...BUT RUNOFF FROM PREVIOUS RAINFALL WILL CONTINUE TO CREATE PONDING OF WATER... AND SOME FLOODING PROBLEMS ALONG CREEKS AND RIVERS. THE VOLGA RIVER AND ITS TRIBUTARIES IN SOUTHERN CLAYTON COUNTY WERE RISING RAPIDLY...WITH WATER LEVELS UP 4 TO 5 FEET IN THE LITTLEPORT AREA. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD. TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES INCLUDING SPORT UTILITY VEHICLES AND PICKUPS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS. $$ MW &
000 WGUS73 KARX 110508 FFSARX IAC043-110530- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 1208 AM CDT SUN MAY 11 2003 ...THE FLASH FLOOD WARNING FOR CLAYTON COUNTY HAS BEEN ALLOWED TO EXPIRE... THE HEAVY RAINFALL HAS MOVED NORTH AND EAST OF CLAYTON COUNTY...AND THERE IS NO LONGER A THREAT FOR HEAVY RAINS TONIGHT. ONLY LIGHT SHOWERS ARE EXPECTED FOR THE REMAINDER OF THE NIGHT. THE WIDESPREAD FLOODING PROBLEMS HAVE SUBSIDED. THEREFORE THE FLASH FLOOD WARNING FOR CLAYTON COUNTY HAS BEEN ALLOWED TO EXPIRE. HOWEVER...MAINSTEM RIVERS CONTINUE TO RUN HIGH AS THEY CARRY AWAY THE WATER. WATCH FOR LATER HYDROLOGIC STATEMENTS CONCERNING THE LOWER TURKEY RIVER AND ITS TRIBUTARIES. $$ MW &
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:02 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 28 min |
| May 10, 7:27 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 33 min |
| May 10, 8:55 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 35 min |
Nearby
Flash Flood Warnings in Iowa, 2003Every flash flood warning in 2003
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.