Alert archive / South Dakota / Tornado Warnings in 1997

Tornado Warning 9, NWS Sioux Falls, SD

July 24, 1997Moody County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 24, 1997, 8:12 PM CDT for Moody County, South Dakota. It was in force for 33 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 24, 1997, 8:12 PM CDT (01:12 UTC)
Expired
Jul 24, 1997, 8:45 PM CDT
In force
33 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Moody County, SD

The radar

The Sioux Falls radar (KFSD), 49 km from the middle of the area, began a volume at 01:11 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, 1.2 hours before the alert went out and 168 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 1997-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2516 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 1997-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
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.

314 
WFUS1 KFSD 250113 RRA
TORFSD
SDC101-250145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
812 PM CDT THU JUL 24 1997

* TORNADO WARNING FOR
  MOODY COUNTY IN EASTCENTRAL SOUTH DAKOTA

* UNTIL 845 PM CDT
 
* SOME AREAS AFFECTED
  LONE TREE                AROUND 825 PM CDT
  EGAN                     AROUND 835 PM CDT

* AT 810 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A DEVELOPING TORNADO 22 MILES WEST OF PIPESTONE  OR 4 MILES
  SOUTHWEST OF LONE TREE MOVING NORTH AT 15 MPH.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IN A HOME OR
BUSINESS IS AN INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE.  AVOID
WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 7:15 PM CDTSevere Thunderstorm WarningFSDBeadle35 min
Jul 24, 7:51 PM CDTSevere Thunderstorm WarningFSDBeadle24 min
Jul 24, 8:18 PM CDTSevere Thunderstorm WarningFSDBeadle32 min
Jul 24, 9:08 PM CDTSevere Thunderstorm WarningFSDBeadle, Kingsbury47 min
Jul 24, 9:36 PM CDTSevere Thunderstorm WarningFSDHanson34 min
Jul 24, 9:49 PM CDTTornado WarningFSDKingsbury31 min
Jul 24, 10:33 PM CDTTornado WarningFSDKingsbury32 min
Jul 24, 11:05 PM CDTTornado WarningFSDKingsbury35 min
Jul 24, 11:41 PM CDTSevere Thunderstorm WarningFSDBrookings49 min
Jul 25, 12:02 AM CDTTornado WarningFSDKingsbury33 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.