Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 175, NWS Twin Cities, MN

August 2, 1997Pope County, Stevens County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 2, 1997, 6:29 PM CDT for Pope County, Stevens County, Minnesota. It was in force for 61 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: Aug 2, 1997, 6:29 PM CDT (23:29 UTC)
Expired: Aug 2, 1997, 7:30 PM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Pope County, MN, Stevens County, MN

The radar

The Minneapolis radar (KMPX), 188 km from the middle of the area, began a volume at 23:29 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
Aug 2, 7:15 PM CDT	Thunderstorm Wind 55	Starbuck, MN	Power lines down. Estimated windspeed.
Aug 2, 7:35 PM CDT	Thunderstorm Wind 55	Glenwood, MN	Power poles 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
Aug 2, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 185 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: 3 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 1768 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 57 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.

000 
TTAA00 KMSP 022329 RRA
SVRMSP
MNC121-149-030030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
629 PM CDT SAT AUG 2 1997

* SEVERE THUNDERSTORM WARNING FOR
  POPE COUNTY - WEST CENTRAL MINNESOTA
  NORTHEASTERN AND EASTERN STEVENS COUNTY - WEST CENTRAL MINNESOTA

* UNTIL 730 PM CDT
 
* SOME LOCATIONS AFFECTED
    MORRIS
    STARBUCK
    GLENWOOD
    LOWRY

* AT 630 PM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS NEAR HOFFMAN OR ABOUT 20 MILES WEST OF
  ALEXANDRIA.  THE STORM WAS MOVING SOUTHEAST AT 15 MPH.

THIS IS A DANGEROUS STORM...WITH LARGE HAIL.  STAY INDOORS AWAY
FROM WINDOWS.


HOWIESON

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 5:52 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	53 min
Aug 2, 6:55 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Mille Lacs	65 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.