Alert archive / Iowa / Flash Flood Warnings in 2010
Flash Flood Warning 21, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at Jul 24, 2010, 2:22 AM CDT for Fayette County, Iowa. It was in force for 5 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
- Jul 24, 2010, 2:22 AM CDT (07:22 UTC)
- Expired
- Jul 24, 2010, 7:30 AM CDT
- In force
- 5 hr
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Flood severity
- None
County Fayette County, IA
The radar
The La Crosse radar (KARX), 125 km from the middle of the area, began a volume at 07:24 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, 7.4 hours before the alert went out and 176 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
- 2120 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1074 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.2
The text
As transmitted, in the capitals the NWS used until 2016.
519 WGUS53 KARX 240722 FFWARX IAC065-241230- /O.NEW.KARX.FF.W.0021.100724T0722Z-100724T1230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 222 AM CDT SAT JUL 24 2010 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WARNING FOR... FAYETTE COUNTY IN NORTHEAST IOWA... * UNTIL 730 AM CDT * AT 220 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE COUNTY. RADAR ESTIMATES THAT 2 TO 3 INCHES OF RAIN HAS ALREADY FALLEN...AND ANOTHER INCH OR SO IS EXPECTED BEFORE THE RAIN ENDS OVERNIGHT. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... OELWEIN...WEST UNION...ARLINGTON...CLERMONT...ELGIN...FAYETTE... HAWKEYE...MAYNARD AND WAUCOMA. * THIS WARNING EXTENDS THE PREVIOUS FLASH FLOOD WARNING FOR FAYETTE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. TURN AROUND... DONT DROWN. && LAT...LON 4264 9208 4308 9208 4309 9161 4264 9162 $$ MW
1 follow-up statement
684 WGUS73 KARX 241223 FFSARX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI ISSUED BY NATIONAL WEATHER SERVICE DES MOINES IA 723 AM CDT SAT JUL 24 2010 IAC065-241237- /O.EXP.KARX.FF.W.0021.000000T0000Z-100724T1230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ FAYETTE IA- 723 AM CDT SAT JUL 24 2010 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR FAYETTE COUNTY WILL BE ALLOWED TO EXPIRE AT 730 AM CDT... THE FLASH FLOOD WARNING HAS BEEN REPLACED BY AN AREAL FLOOD WARNING IN EFFECT UNTIL SUNDAY MORNING. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY. LAT...LON 4264 9208 4308 9208 4309 9161 4264 9162 $$ DONAVON
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 11:08 PM CDT | Flash Flood Warning | ARX | Clayton | 3 hr |
| Jul 23, 11:27 PM CDT | Flash Flood Warning | ARX | Fayette | 3 hr |
| Jul 24, 1:27 AM CDT | Flash Flood Warning | ARX | Chickasaw, Floyd | 5 hr |
| Jul 24, 1:59 AM CDT | Flash Flood Warning | ARX | Clayton | 6 hr |
| Jul 24, 7:21 AM CDT | Areal Flood Warning | ARX | Clayton, Fayette | 7 hr |
Nearby
Flash Flood Warnings in Iowa, 2010Every flash flood warning in 2010
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.