Alert archive / South Dakota / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 508

June 22, 199719 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 22, 1997, 5:00 PM MDT for 19 counties in South Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 22, 1997, 5:00 PM MDT (23:00 UTC)
Expired
Jun 22, 1997, 10:00 PM MDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 45 km from the middle of the area, began a volume at 22:59 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

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

IssuedProductOfficeCountiesLasted
Jun 22, 5:22 PM MDTSevere Thunderstorm WarningUNRMeade48 min
Jun 22, 7:26 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Pennington34 min
Jun 22, 8:01 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Pennington49 min

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 307 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, Bismarck Municip, ND at 12:00Z on 1997-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 137 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, Bismarck Municip, ND at 12:00Z on 1997-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 square meters per square second.1939587897Sfc1 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
137 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
1145 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
174 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 22, 11:00 AM MDTTornado WatchSPCBeadle, Brookings, Brown, Buffalo, Campbell, Clark and 29 more6 hr
Jun 22, 3:30 PM MDTTornado WatchSPCHarding, Perkins7 hr
Jun 22, 5:00 PM MDTTornado WatchSPCBeadle, Brookings, Buffalo, Clark, Codington, Day and 14 more5 hr

Nearby

Severe Thunderstorm Watches in South 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.