Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 233, NWS Twin Cities, MN

October 6, 1997Dakota County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Oct 6, 1997, 7:19 AM CDT for Dakota County, Minnesota. It was in force for 41 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
Oct 6, 1997, 7:19 AM CDT (12:19 UTC)
Expired
Oct 6, 1997, 8:00 AM CDT
In force
41 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Dakota County, MN

The radar

The Minneapolis radar (KMPX), 44 km from the middle of the area, began a volume at 12:20 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

TimeReportWhereRemark
Oct 6, 7:30 AM CDTHail 0.75Burnsville, 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 12:00Z, 0.3 hours before the alert went out and 47 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 1997-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1997-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
2580 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
293 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 061221 RRA
SVRMSP
MNC037-061300-

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


* SEVERE THUNDERSTORM WARNING FOR
  DAKOTA COUNTY - EAST CENTRAL MINNESOTA

* UNTIL 800 AM CDT

* SOME LOCATIONS AFFECTED
    BURNSVILLE
    LAKEVILLE
    APPLE VALLEY
    EAGAN

* AT 717 AM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  HAIL AND DAMAGING WINDS FROM COLOGNE TO PRIOR LAKE...OR ABOUT 20
  MILES SOUTH OF DOWNTOWN  MINNEAPOLIS.  THE STORM WAS MOVING EAST
  AT 45 MPH.

AROUND 7 AM...UP TO THREE QUARTER INCH HAIL WAS REPORTED COVERING
THE GROUND TO A DEPTH OF 1 TO 2 INCHES NEAR CARVER. THIS STORM HAS
A HISTORY OF PRODUCING VERY LARGE AMOUNTS OF HAIL AND WIND DAMAGE.

MILLER

&

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 6, 4:20 AM CDTSevere Thunderstorm WarningMPXYellow Medicine35 min
Oct 6, 4:48 AM CDTSevere Thunderstorm WarningMPXChippewa, Renville, Yellow Medicine62 min
Oct 6, 5:51 AM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley54 min
Oct 6, 6:43 AM CDTSevere Thunderstorm WarningMPXCarver, Scott62 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997Every 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.