Alert archive / South Dakota / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 533

June 28, 19979 counties in Minnesota; 5 counties in North Dakota; 15 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 28, 1997, 9:00 AM CDT for 9 counties in Minnesota; 5 counties in North Dakota; 15 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 28, 1997, 9:00 AM CDT (14:00 UTC)
Expired
Jun 28, 1997, 3:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 29 counties

Becker County, MN, Big Stone County, MN, Clay County, MN, Grant County, MN, Otter Tail County, MN, Stevens County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Cass County, ND, Dickey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Beadle County, SD, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Marshall County, SD, Roberts County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 24 km from the middle of the area, began a volume at 14:04 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

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

IssuedProductOfficeCountiesLasted
Jun 28, 9:14 AM CDTSevere Thunderstorm WarningABRBrown, McPherson51 min
Jun 28, 9:16 AM CDTSevere Thunderstorm WarningFGFOtter Tail29 min
Jun 28, 9:31 AM CDTSevere Thunderstorm WarningFGFWilkin44 min
Jun 28, 9:38 AM CDTSevere Thunderstorm WarningABREdmunds47 min
Jun 28, 9:47 AM CDTSevere Thunderstorm WarningFGFOtter Tail28 min
Jun 28, 9:52 AM CDTSevere Thunderstorm WarningFGFRansom, Sargent38 min
Jun 28, 9:55 AM CDTSevere Thunderstorm WarningABRSpink65 min
Jun 28, 10:05 AM CDTSevere Thunderstorm WarningABRBrown45 min
Jun 28, 10:12 AM CDTSevere Thunderstorm WarningFGFWilkin48 min
Jun 28, 10:21 AM CDTSevere Thunderstorm WarningFGFOtter Tail54 min
Jun 28, 10:29 AM CDTSevere Thunderstorm WarningFGFRichland, Sargent31 min
Jun 28, 10:47 AM CDTSevere Thunderstorm WarningABRTraverse63 min
Jun 28, 10:47 AM CDTSevere Thunderstorm WarningABRDay, Marshall, Roberts63 min
Jun 28, 11:00 AM CDTFlash Flood WarningFGFOtter Tail4 hr
Jun 28, 11:02 AM CDTSevere Thunderstorm WarningFGFRichland28 min
Jun 28, 11:21 AM CDTSevere Thunderstorm WarningABRBig Stone64 min
Jun 28, 11:27 AM CDTSevere Thunderstorm WarningFGFWilkin33 min
Jun 28, 11:51 AM CDTSevere Thunderstorm WarningMPXStevens39 min
Jun 28, 12:21 PM CDTFlash Flood WarningFGFWilkin2 hr
Jun 28, 1:03 PM CDTSevere Thunderstorm WarningFGFOtter Tail27 min
Jun 28, 1:10 PM CDTSevere Thunderstorm WarningFGFWadena35 min

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 2.0 hours before the alert went out and 63 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 12:00Z on 1997-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3944 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 12:00Z on 1997-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.1939Sfc1 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
3944 J/kg
Mixed-layer CIN
-170 J/kg
Mixed-layer LCL
854 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 27, 8:30 PM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Cass, Clay, Clearwater, Hubbard and 3 more6 hr
Jun 27, 10:45 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Beltrami, Carlton, Cass, Clay and 18 more5 hr
Jun 28, 12:30 PM CDTSevere Thunderstorm WatchSPCAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 33 more6 hr
Jun 28, 3:30 PM CDTSevere Thunderstorm WatchSPCChisago, Dakota, Dodge, Fillmore, Freeborn, Goodhue and 8 more6 hr
Jun 28, 6:30 PM CDTSevere Thunderstorm WatchSPCBlue Earth, Dodge, Faribault, Fillmore, Freeborn, Goodhue and 11 more6 hr

Nearby

Severe Thunderstorm Watches in South Dakota, 1997Severe Thunderstorm Watches in Minnesota, 1997Severe Thunderstorm Watches in North Dakota, 1997Every severe thunderstorm 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.