Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 232, NWS Twin Cities, MN

October 6, 1997Carver County, Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Oct 6, 1997, 6:43 AM CDT for Carver County, Scott County, Minnesota. It was in force for 62 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 6, 1997, 6:43 AM CDT (11:43 UTC)
Expired: Oct 6, 1997, 7:45 AM CDT
In force: 62 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Carver County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 15 km from the middle of the area, began a volume at 11:45 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
Oct 6, 6:50 AM CDT	Hail 0.75	Hamburg, MN
Oct 6, 7:00 AM CDT	Hail 0.75	Carver, MN	Hail accumulated to a depth of 2 inches.
Oct 6, 7:20 AM CDT	Hail 0.75	Prior Lake, 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.7 hours before the alert went out and 14 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: 2930 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 80 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 061144 RRA
SVRMSP
MNC019-139-061245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
643 AM CDT MON OCT 6 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHERN CARVER COUNTY - EAST CENTRAL MINNESOTA
  SCOTT COUNTY - EAST CENTRAL MINNESOTA

* UNTIL 745 AM CDT

* SOME LOCATIONS AFFECTED
    NORWOOD
    COLOGNE
    CARVER
    JORDAN

* AT 640 AM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS FROM YOUNG AMERICA TO GREEN ISLE...OR
  ABOUT 30 MILES SOUTHWEST OF  DOWNTOWN MINNEAPOLIS.  THE STORM
  WAS MOVING EAST AT 45 MPH.

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE AND HAIL TO 2
INCHES DEEP ACROSzS CENTRAL MINNESOTA.  POWER LINES WERE BLOWN DOWN
IN GLENCOE AROUND 630 AM.

MILLER


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 6, 4:20 AM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	35 min
Oct 6, 4:48 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Renville, Yellow Medicine	62 min
Oct 6, 5:51 AM CDT	Severe Thunderstorm Warning	MPX	McLeod, Renville, Sibley	54 min
Oct 6, 7:19 AM CDT	Severe Thunderstorm Warning	MPX	Dakota	41 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.