Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 17, NWS Twin Cities, MN

June 22, 1997Redwood County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 22, 1997, 6:41 PM CDT for Redwood County, Minnesota. 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: Jun 22, 1997, 6:41 PM CDT (23:41 UTC)
Expired: Jun 22, 1997, 7:45 PM CDT
In force: 64 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Redwood County, MN

The radar

The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 23:40 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
Jun 22, 7:20 PM CDT	Thunderstorm Wind 50	Walnut Grove, MN	Large trees down. 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
Jun 22, 5:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.7 hours before the alert went out and 140 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1642 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

188 
WUUS1 KMSP 222343 RRA
SVRMSP
MNC127-230045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
641 PM CDT SUN JUN 22 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHERN REDWOOD COUNTY - SOUTHWESTERN MINNESOTA

* UNTIL 745 PM CDT
 
* SOME LOCATIONS AFFECTED
    WALNUT GROVE
    REVERE
    LAMBERTON
    WANDA
    SANBORN

* AT 640 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS JUST WEST OF WALNUT GROVE.. OR 30 MILES
  SOUTHWEST OF REDWOOD FALLS.  THE STORM WAS MOVING EAST-SOUTHEAST
  AT 25 MPH.

THIS IS A DANGEROUS STORM.  STAY INDOORS AWAY FROM WINDOWS.

A TORNADO WATCH IS IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

JMM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 4:21 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker	54 min
Jun 22, 4:49 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Meeker, Renville	61 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.