Alert archive / Minnesota / Tornado Warnings in 1998

Tornado Warning 17, NWS La Crosse, WI

June 20, 1998Fillmore County, Olmsted County, Minnesota

NWS La Crosse, WI issued this tornado warning at Jun 20, 1998, 1:46 PM CDT for Fillmore County, Olmsted County, Minnesota. It was in force for 64 min. 3 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: Jun 20, 1998, 1:46 PM CDT (18:46 UTC)
Expired: Jun 20, 1998, 2:50 PM CDT
In force: 64 min
Issued by: NWS La Crosse, WI
Area: Whole counties

Counties Fillmore County, MN, Olmsted County, MN

What was reported inside it

Time	Report	Where
Jun 20, 2:37 PM CDT	Hail 0.75	Ostrander, MN
Jun 20, 2:51 PM CDT	Thunderstorm Wind 61	Ostrander, MN
Jun 20, 3:00 PM CDT	Thunderstorm Wind 56	Ostrander, 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
Jun 20, 9:15 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 20, 1:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.8 hours before the alert went out and 156 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: 18 J/kg
Mixed-layer CIN: -384 J/kg
Mixed-layer LCL: 2049 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 416 m²/s²
0-3 km storm-relative helicity: 589 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

999 
WFUS1 KLSE 201849 RRA
TORLSE
MNC045-109-201950-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
146 PM CDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN OLMSTED COUNTY IN SOUTHEASTERN MINNESOTA
  FILLMORE COUNTY IN SOUTHEASTERN MINNESOTA

* UNTIL 250 PM CDT

* AT 145 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 25 MILES SOUTHWEST OF ROCHESTER...MOVING EAST AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  SPRING VALLEY AROUND 230 PM CDT
  STEWARTVILLE AROUND 230 PM CDT

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL AND DAMAGING WINDS.
GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

TMC/KRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 12:43 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower	77 min
Jun 20, 1:13 PM CDT	Tornado Warning	ARX	Dodge, Mower	47 min
Jun 20, 1:56 PM CDT	Tornado Warning	ARX	Mower	44 min
Jun 20, 2:11 PM CDT	Flash Flood Warning	ARX	Mower	2 hr
Jun 20, 2:40 PM CDT	Severe Thunderstorm Warning	ARX	Mower	30 min
Jun 20, 2:49 PM CDT	Tornado Warning	ARX	Fillmore	61 min
Jun 20, 3:25 PM CDT	Tornado Warning	ARX	Fillmore	60 min
Jun 20, 4:00 PM CDT	Severe Thunderstorm Warning	ARX	Houston	60 min
Jun 20, 4:25 PM CDT	Tornado Warning	ARX	Houston	60 min

Nearby

Tornado Warnings in Minnesota, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.