Alert archive / South Dakota / Tornado Watches in 1997

Tornado Watch 746

October 11, 199715 counties in North Dakota; 22 counties in South Dakota

The Storm Prediction Center issued this tornado watch at Oct 11, 1997, 4:15 PM CDT for 15 counties in North Dakota; 22 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Oct 11, 1997, 4:15 PM CDT (21:15 UTC)
Expired
Oct 11, 1997, 10:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 37 counties

Burleigh County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, Logan County, ND, McIntosh County, ND, McLean County, ND, Morton County, ND, Oliver County, ND, Sheridan County, ND, Sioux County, ND, Stutsman County, ND, Wells County, ND, Bennett County, SD, Campbell County, SD, Corson County, SD, Custer County, SD, Dewey County, SD, Fall River County, SD, Haakon County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, McPherson County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 134 km from the middle of the area, began a volume at 21:17 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.

Warnings issued inside it

22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Oct 11, 5:08 PM CDTSevere Thunderstorm WarningUNRPennington47 min
Oct 11, 5:20 PM CDTSevere Thunderstorm WarningUNRMeade45 min
Oct 11, 5:59 PM CDTSevere Thunderstorm WarningUNRZiebach46 min
Oct 11, 6:04 PM CDTSevere Thunderstorm WarningUNRMeade46 min
Oct 11, 6:12 PM CDTSevere Thunderstorm WarningABRCorson, Dewey33 min
Oct 11, 6:17 PM CDTSevere Thunderstorm WarningABRDewey33 min
Oct 11, 6:43 PM CDTSevere Thunderstorm WarningUNRMeade32 min
Oct 11, 6:48 PM CDTSevere Thunderstorm WarningBISSioux57 min
Oct 11, 6:52 PM CDTSevere Thunderstorm WarningABRCorson43 min
Oct 11, 6:55 PM CDTSevere Thunderstorm WarningUNRZiebach50 min
Oct 11, 6:59 PM CDTSevere Thunderstorm WarningABRDewey46 min
Oct 11, 7:08 PM CDTSevere Thunderstorm WarningUNRPennington37 min
Oct 11, 7:32 PM CDTSevere Thunderstorm WarningABRCampbell, Corson, Walworth48 min
Oct 11, 7:43 PM CDTSevere Thunderstorm WarningABRDewey47 min
Oct 11, 7:45 PM CDTSevere Thunderstorm WarningUNRPennington45 min
Oct 11, 7:45 PM CDTSevere Thunderstorm WarningUNRHaakon45 min
Oct 11, 8:22 PM CDTSevere Thunderstorm WarningABRCorson63 min
Oct 11, 8:26 PM CDTSevere Thunderstorm WarningBISEmmons49 min
Oct 11, 8:26 PM CDTSevere Thunderstorm WarningABRDewey34 min
Oct 11, 8:34 PM CDTSevere Thunderstorm WarningBISWells56 min
Oct 11, 9:13 PM CDTSevere Thunderstorm WarningBISSheridan62 min
Oct 11, 9:18 PM CDTSevere Thunderstorm WarningBISEmmons27 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.3 hours before the alert went out and 141 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, Rapid City, SD at 12:00Z on 1997-10-11Temperature 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, Rapid City, SD at 12:00Z on 1997-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
2695 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Tornado Watches in South Dakota, 1997Tornado Watches in North Dakota, 1997Every tornado watch 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.