Alert archive / Minnesota / Tornado Warnings in 1997

Tornado Warning 15, NWS Sioux Falls, SD

July 26, 1997Pipestone County, Minnesota

NWS Sioux Falls, SD issued this tornado warning at Jul 26, 1997, 9:25 PM CDT for Pipestone County, Minnesota. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 26, 1997, 9:25 PM CDT (02:25 UTC)
Expired
Jul 26, 1997, 9:55 PM CDT
In force
30 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Pipestone County, MN

The radar

The Sioux Falls radar (KFSD), 61 km from the middle of the area, began a volume at 02:24 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.4 hours before the alert went out and 196 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, Aberdeen, SD at 00:00Z on 1997-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 419 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, Aberdeen, SD at 00:00Z on 1997-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939587897Sfc1 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
419 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
1810 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 270229 COR
TORFSD
MNC117-270255-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
925 PM CDT SAT JUL 26 1997

* TORNADO WARNING FOR
  EASTERN PIPESTONE COUNTY IN SOUTHWESTERN MINNESOTA

* UNTIL 955 PM CDT

* SOME AREAS AFFECTED
  WOODSTOCK                AROUND 935 PM CDT

* AT 915 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A
  TORNADO 1 MILE SOUTH OF PIPESTONE  MOVING
NORTHEAST AT 25 MPH. ALTHOUGH THE TORNADO LIFTED AFTER A BRIEF
SPINUP AT THE SURFACE...THIS STORM HAS A HISTORY OF PRODUCING
FUNNEL CLOUDS AND ANOTHER TORNADO COULD DEVELOP. GUSTRY WINDS AND
HAIL ARE ALSO POSSIBLE WITH THIS STORM.

WILLIAMS
&

Nearby

Tornado Warnings in Minnesota, 1997Every tornado warning in 1997Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.