Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 214, NWS Twin Cities, MN

August 30, 1997Renville County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 30, 1997, 1:06 AM CDT for Renville County, Sibley County, Minnesota. It was in force for 39 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
Aug 30, 1997, 1:06 AM CDT (06:06 UTC)
Expired
Aug 30, 1997, 1:45 AM CDT
In force
39 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Renville County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 84 km from the middle of the area, began a volume at 06:07 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
Aug 30, 1:40 AM CDTTornado F0New Auburn, MNBrief touchdown on north end of Shilling Lake. Roof damage and large trees down on farmstead. Windows broken.

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, 6.1 hours before the alert went out and 81 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 00:00Z on 1997-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 962 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 1997-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 161 square meters per square second.1939Sfc1 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
962 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
680 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
161 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 300608 RRA
SVRMSP
MNC129-143-300645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
106 AM CDT SAT AUG 30 1997


* SEVERE THUNDERSTORM WARNING FOR
  SOUTHEASTERN RENVILLE COUNTY - CENTRAL MINNESOTA
  WESTERN SIBLEY COUNTY - SOUTH CENTRAL MINNESOTA

* UNTIL 145 AM CDT

* SOME LOCATIONS AFFECTED
    FAIRFAX
    GIBBON

* AT 105 AM CDT DOPPLER RADAR INDICATED A SEVERE STORM WITH LARGE
  H|AIL 20 MILES EAST OF REDWOOD FALLS...NEAR FAIRFAX..  THE STORM
  WAS MOVING EAST AT 20 MPH..

DAMAGING WINDS AND LARGE HAIL ARE LIKELY.  GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.


WET

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 12:55 AM CDTSevere Thunderstorm WarningMPXWaseca35 min
Aug 30, 1:59 AM CDTSevere Thunderstorm WarningMPXCarver, Scott46 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.