Alert archive / South Dakota / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 639

August 2, 2000Carter County, Montana; 9 counties in South Dakota; Campbell County, Crook County, Weston County, Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 2000, 1:15 PM MDT for Carter County, Montana; 9 counties in South Dakota; Campbell County, Crook County, Weston County, Wyoming. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 2, 2000, 1:15 PM MDT (19:15 UTC)
Expired
Aug 2, 2000, 7:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Carter County, MT, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Campbell County, WY, Crook County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 106 km from the middle of the area, began a volume at 19:17 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

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

IssuedProductOfficeCountiesLasted
Aug 2, 2:53 PM MDTSevere Thunderstorm WarningUNRMeade52 min
Aug 2, 4:04 PM MDTSevere Thunderstorm WarningUNRCrook, Weston56 min
Aug 2, 4:47 PM MDTSevere Thunderstorm WarningUNRHarding43 min
Aug 2, 4:59 PM MDTSevere Thunderstorm WarningUNRWeston31 min
Aug 2, 5:19 PM MDTSevere Thunderstorm WarningUNRCuster41 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 7.3 hours before the alert went out and 104 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, Rapid City, SD at 12:00Z on 2000-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 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, Rapid City, SD at 12:00Z on 2000-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.193958Sfc1 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
11 J/kg
Mixed-layer CIN
-278 J/kg
Mixed-layer LCL
2332 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Aug 1, 7:00 PM MDTSevere Thunderstorm WatchSPCCarter, Custer, Daniels, Dawson, Fallon, McCone and 7 more6 hr
Aug 2, 2:00 PM MDTSevere Thunderstorm WatchSPCSheridan6 hr
Aug 2, 5:30 PM MDTSevere Thunderstorm WatchSPCGoshen, Niobrara6 hr

Nearby

Severe Thunderstorm Watches in South Dakota, 2000Severe Thunderstorm Watches in Wyoming, 2000Severe Thunderstorm Watches in Montana, 2000Every severe thunderstorm watch in 2000

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.