Alert archive / Minnesota / Tornado Warnings in 1997

Tornado Warning 22, NWS Twin Cities, MN

July 13, 1997Nicollet County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 13, 1997, 6:43 PM CDT for Nicollet County, Minnesota. It was in force for 47 min. 2 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: Jul 13, 1997, 6:43 PM CDT (23:43 UTC)
Expired: Jul 13, 1997, 7:30 PM CDT
In force: 47 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Nicollet County, MN

The radar

The Minneapolis radar (KMPX), 77 km from the middle of the area, began a volume at 23:45 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
Jul 13, 7:01 PM CDT	Hail 4	Klossner, MN	Crop damage.
Jul 13, 7:35 PM CDT	Thunderstorm Wind 55	Norseland, MN	Large tree blown down across Highway 22. 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
Jul 13, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.7 hours before the alert went out and 334 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: 825 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1060 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 132344 RRA
TORMSP
MNC103-140030-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
643 PM CDT SUN JUL 13 1997

* TORNADO WARNING FOR
  NICOLLET COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 730 PM CDT
 
* SOME LOCATIONS AFFECTED
    KLOSSNER
    LAFAYETTE
    BERNADOTTE
    COURTLAND

* AT 643 PM CDT DOPPLER RADAR DETECTED A POSSIBLE TORNADO JUST EAST
  OF NEW ULM.  THE STORM WAS MOVING NORTHEAST AT 25 MPH.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

HAMEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 12:36 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	39 min
Jul 13, 4:27 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Yellow Medicine	33 min
Jul 13, 5:00 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Yellow Medicine	45 min
Jul 13, 5:35 PM CDT	Severe Thunderstorm Warning	MPX	Watonwan	40 min
Jul 13, 6:01 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	44 min
Jul 13, 6:15 PM CDT	Severe Thunderstorm Warning	MPX	Brown	45 min
Jul 13, 6:19 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	56 min
Jul 13, 6:47 PM CDT	Severe Thunderstorm Warning	MPX	Meeker	58 min

Nearby

Tornado Warnings in Minnesota, 1997 Every tornado warning in 1997 Tornadoes 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.