Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 236, NWS Twin Cities, MN

October 8, 1997Stevens County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Oct 8, 1997, 8:25 PM CDT for Stevens County, Swift County, Minnesota. It was in force for 50 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: Oct 8, 1997, 8:25 PM CDT (01:25 UTC)
Expired: Oct 8, 1997, 9:15 PM CDT
In force: 50 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Stevens County, MN, Swift County, MN

The radar

The Minneapolis radar (KMPX), 190 km from the middle of the area, began a volume at 01:29 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
Oct 8, 8:50 PM CDT	Thunderstorm Wind 52	Holloway, MN
Oct 8, 8:55 PM CDT	Thunderstorm Wind 55	Chokio, MN	Farm equipment blown over. Estimated windspeed.
Oct 8, 8:55 PM CDT	Thunderstorm Wind 55	Alberta, MN	Structural damage just south of Lake Hattie. Estimated windspeed.

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
Oct 8, 7:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.4 hours before the alert went out and 187 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: 239 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 518 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 401 m²/s²
0-3 km storm-relative helicity: 449 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

741 
WUUS1 KMSP 090126 RRA
SVRMSP
MNC023-127-129-149-151-090215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
825 PM CDT WED OCT 8 1997


* SEVERE THUNDERSTORM WARNING FOR
  CHIPPEWA COUNTY - WEST CENTRAL MINNESOTA
  REDWOOD COUNTY - SOUTHWESTERN MINNESOTA
  RENVILLE COUNTY - CENTRAL MINNESOTA
  STEVENS COUNTY - WEST CENTRAL MINNESOTA
  SWIFT COUNTY - WEST CENTRAL MINNESOTA

* UNTIL 915 PM CDT

* SOME LOCATIONS AFFECTED
    MORRIS
    BENSON
    MONTEVIDEO
    REDWOOD FALLS

* AT 825 PM CDT DOPPLER RADAR INDICATED A LINE OF SEVERE STORMS
  FROM APPLETON TO SOUTH OF MARSHALL.  THE STORMS WERE MOVING
  NORTHEAST AT 50 MPH.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.


MCBEATH PETERS

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 8, 7:56 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	34 min
Oct 8, 8:25 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	50 min
Oct 8, 8:25 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa	50 min
Oct 8, 9:07 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	53 min
Oct 8, 9:07 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	53 min
Oct 8, 11:15 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs	60 min
Oct 8, 11:43 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Sibley	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997 Every severe thunderstorm warning in 1997

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.