Alert archive / Iowa / Tornado Warnings in 2001
Tornado Warning 1, NWS La Crosse, WI
NWS La Crosse, WI issued this tornado warning at Apr 11, 2001, 5:11 PM CDT for Fayette County, Iowa. It was in force for 64 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 11, 2001, 5:11 PM CDT (22:11 UTC)
- Expired
- Apr 11, 2001, 6:15 PM CDT
- In force
- 64 min
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
County Fayette County, IA
The radar
The La Crosse radar (KARX), 119 km from the middle of the area, began a volume at 22:11 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 11, 5:50 PM CDT | Tornado F1 | West Union, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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, 10.2 hours before the alert went out and 177 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 112212 TORLSE IAC065-112315- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 511 PM CDT WED APR 11 2001 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * TORNADO WARNING FOR... FAYETTE COUNTY IN NORTHEAST IOWA * UNTIL 615 PM CDT * AT 511 PM CDT...WEATHER SPOTTERS REPORTED A TORNADO 20 MILES SOUTH OF FAIRBANK...OR NEAR LA PORTE CITY...MOVING NORTH AT 45 MPH. * THE TORNADO IS EXPECTED TO BE... NEAR FAIRBANK AT 530 PM CDT... NEAR OELWEIN AT 535 PM CDT... NEAR MAYNARD AND ARLINGTON AT 545 PM CDT... TAKE COVER IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR $$ NELSON LAT...LON 4263 9210 4263 9163 4308 9164 4307 9206 &
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, 5:17 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 28 min |
| Apr 11, 6:00 PM CDT | Tornado Warning | ARX | Winneshiek | 45 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.