Alert archive / South Dakota / Tornado Warnings in 1997

Tornado Warning 32, NWS Aberdeen, SD

July 25, 1997Marshall County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 25, 1997, 7:15 PM CDT for Marshall County, South Dakota. It was in force for 50 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 25, 1997, 7:15 PM CDT (00:15 UTC)
Expired
Jul 25, 1997, 8:05 PM CDT
In force
50 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Marshall County, SD

The radar

The Aberdeen radar (KABR), 72 km from the middle of the area, began a volume at 00:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 25, 6:00 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.3 hours before the alert went out and 114 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 1997-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3331 joules per kilogram.LCLEL10008507005003002001001 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 1997-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.19395878Sfc1 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
3331 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1007 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
1.2
Supercell composite
4.3

Open this sounding in Storm Lab

The text

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

561 
WFUS1 KABR 260016 RRA
TORABR
SDC091-260105-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
715 PM CDT FRI JUL 25 1997

* TORNADO WARNING FOR
  EXTREME NORTHERN MARSHALL COUNTY - NORTHEASTERN SOUTH DAKOTA

* UNTIL 805 PM CDT
 
* SOME LOCATIONS AFFECTED
  VEBLEN                              AROUND 730 PM CDT

* AT 714 PM CDT...ABERDEEN DOPPLER RADAR INDICATED A TORNADO 28
  MILES NORTHWEST OF SISSETON OR 11 MILES WEST OF VEBLEN MOVING
  SOUTHEAST AT 35 MPH.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

CB/DEE

The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 25, 7:25 PM CDTSevere Thunderstorm WarningABRCorson, Dewey65 min
Jul 25, 7:31 PM CDTTornado WarningABRBrown, Spink49 min
Jul 25, 7:59 PM CDTTornado WarningABRDewey61 min
Jul 25, 8:21 PM CDTSevere Thunderstorm WarningABRSpink59 min
Jul 25, 8:26 PM CDTTornado WarningABRSpink64 min
Jul 25, 8:43 PM CDTSevere Thunderstorm WarningABRClark62 min
Jul 25, 8:52 PM CDTSevere Thunderstorm WarningABRPotter63 min
Jul 25, 9:43 PM CDTSevere Thunderstorm WarningABRHamlin47 min
Jul 26, 5:03 AM CDTSevere Thunderstorm WarningABRDewey32 min
Jul 26, 5:22 AM CDTSevere Thunderstorm WarningABRPotter, Sully63 min

Nearby

Tornado Warnings in South Dakota, 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.