Alert archive / South Dakota / Tornado Warnings in 1997

Tornado Warning 27, NWS Aberdeen, SD

July 24, 1997Clark County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 24, 1997, 9:45 PM CDT for Clark County, South Dakota. It was in force for 30 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: Jul 24, 1997, 9:45 PM CDT (02:45 UTC)
Expired: Jul 24, 1997, 10:15 PM CDT
In force: 30 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Clark County, SD

The radar

The Aberdeen radar (KABR), 85 km from the middle of the area, began a volume at 02:47 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

Time	Report	Where	Remark
Jul 24, 10:00 PM CDT	Thunderstorm Wind 57	Naples, SD

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

Aberdeen, SD (KABR), launched 00:00Z, 2.8 hours before the alert went out and 53 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2516 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

790 
WFUS1 KABR 250245
TORABR
SDC025-250315-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
945 PM CDT THU JUL 24 1997

* TORNADO WARNING FOR
  EASTERN CLARK COUNTY - NORTHEASTERN SOUTH DAKOTA

* UNTIL 1015 PM CDT
 
* SOME LOCATIONS AFFECTED

* AT 942 PM CDT...ABERDEEN DOPPLER RADAR INDICATED A TORNADO 5
  MILES SOUTHWEST OF HENRY OR 20 MILES WEST OF WATERTOWN MOVING
  NORTHEAST 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.

Issued	Product	Office	Counties	Lasted
Jul 24, 8:36 PM CDT	Severe Thunderstorm Warning	ABR	Jones	64 min
Jul 24, 9:07 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Spink	63 min
Jul 24, 9:51 PM CDT	Severe Thunderstorm Warning	ABR	Codington, Hamlin	94 min
Jul 24, 11:21 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	34 min
Jul 25, 12:07 AM CDT	Severe Thunderstorm Warning	ABR	Hamlin	48 min
Jul 25, 12:14 AM CDT	Flash Flood Warning	ABR	Clark, Codington, Deuel, Hamlin	3 hr
Jul 25, 4:37 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	58 min
Jul 25, 4:51 PM CDT	Tornado Warning	ABR	McPherson	44 min
Jul 25, 5:37 PM CDT	Tornado Warning	ABR	Edmunds, McPherson	58 min
Jul 25, 6:22 PM CDT	Severe Thunderstorm Warning	ABR	Corson	63 min
Jul 25, 6:36 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds	64 min
Jul 25, 6:45 PM CDT	Tornado Warning	ABR	Edmunds	50 min
Jul 25, 6:56 PM CDT	Tornado Warning	ABR	Brown	34 min

Nearby

Tornado Warnings in South Dakota, 1997 Every tornado warning in 1997 Tornadoes 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.