Alert archive / Minnesota / Tornado Warnings in 2001

Tornado Warning 5, NWS La Crosse, WI

May 1, 2001Olmsted County, Minnesota

NWS La Crosse, WI issued this tornado warning at May 1, 2001, 7:51 PM CDT for Olmsted County, Minnesota. It was in force for 39 min. 4 reports 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: May 1, 2001, 7:51 PM CDT (00:51 UTC)
Expired: May 1, 2001, 8:30 PM CDT
In force: 39 min
Issued by: NWS La Crosse, WI
Area: Whole counties

County Olmsted County, MN

What was reported inside it

Time	Report	Where
May 1, 7:52 PM CDT	Hail 1	Rochester, MN
May 1, 8:06 PM CDT	Thunderstorm Wind 52 M	Eyota, MN
May 1, 8:06 PM CDT	Tornado F0	Stewartville, MN
May 1, 8:30 PM CDT	Hail 0.75	Stewartville, MN

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
May 1, 3:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.9 hours before the alert went out and 134 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 453 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1677 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -70 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -4.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KARX 020051
TORLSE
MNC109-020130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
751 PM CDT TUE MAY 1 2001

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  OLMSTED COUNTY IN SOUTHEAST MINNESOTA

* UNTIL 830 PM CDT

* AT 751 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 15 MILES SOUTHWEST OF EYOTA...OR ABOUT 9 MILES
  SOUTH OF ROCHESTER...MOVING EAST AT 30 MPH.

* THE DEVELOPING TORNADO IS EXPECTED TO BE...
  NEAR EYOTA AT 805 PM CDT...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
NOT BE OCCURRING WHEN THE WARNING IS ISSUED...BUT ONE IS EXPECTED TO
DEVELOP. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...TAKE COVER
IN A BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR!

$$

RIECK

LAT...LON 4398 9257 4386 9W255 4387 9211 4408 9222

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 7:06 PM CDT	Tornado Warning	ARX	Mower	39 min
May 1, 7:27 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Olmsted	63 min
May 1, 7:44 PM CDT	Tornado Warning	ARX	Mower	46 min
May 1, 8:03 PM CDT	Tornado Warning	ARX	Fillmore	57 min
May 1, 8:10 PM CDT	Tornado Warning	ARX	Winona	50 min
May 1, 9:02 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Winona	58 min

Nearby

Tornado Warnings in Minnesota, 2001 Every tornado warning in 2001 Tornadoes 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.