Alert archive / Iowa / Tornado Warnings in 2001
Tornado Warning 2, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Apr 11, 2001, 6:00 PM CDT for Winneshiek County, Iowa. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 11, 2001, 6:00 PM CDT (23:00 UTC)
- Expired
- Apr 11, 2001, 6:45 PM CDT
- In force
- 45 min
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
County Winneshiek County, IA
The radar
The La Crosse radar (KARX), 79 km from the middle of the area, began a volume at 23:01 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 11, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.0 hours before the alert went out and 216 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
- 196 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 822 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 336 m²/s²
- 0-3 km storm-relative helicity
- 387 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KARX 112301 TORLSE IAC191-112345- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 600 PM CDT WED APR 11 2001 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * TORNADO WARNING FOR... WINNESHIEK COUNTY IN NORTHEAST IOWA * UNTIL 645 PM CDT * AT 600 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 12 MILES SOUTH OF FORT ATKINSON...OR ABOUT 4 MILES NORTHWEST OF WEST UNION...MOVING NORTH AT 55 MPH. * THE TORNADO IS EXPECTED TO BE... NEAR FORT ATKINSON AT 605 PM CDT... NEAR OSSIAN AND CALMAR AT 610 PM CDT... NEAR RIDGEWAY AT 615 PM CDT... NEAR DECORAH AT 620 PM CDT... TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR PLEASE REPORT ANY SEVERE WEATHER TO YOUR LOCAL LAW ENFORCEMENT OFFICE AND TELL THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. $$ NELSON LAT...LON 4307 9210 4308 9161 4350 9161 4349 9199
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 4:34 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 41 min |
| Apr 11, 4:58 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard | 47 min |
| Apr 11, 5:11 PM CDT | Tornado Warning | ARX | Fayette | 64 min |
| Apr 11, 5:17 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 28 min |
| Apr 11, 6:26 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton | 64 min |
Nearby
Tornado Warnings in Iowa, 2001Every tornado warning in 2001Tornadoes in 2001
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.