Alert archive / Montana / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 381

June 8, 20015 counties in Montana; Custer County, Lawrence County, Pennington County, South Dakota; Campbell County, Crook County, Weston County, Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jun 8, 2001, 8:15 PM MDT for 5 counties in Montana; Custer County, Lawrence County, Pennington County, South Dakota; Campbell County, Crook County, Weston County, Wyoming. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 8, 2001, 8:15 PM MDT (02:15 UTC)
Expired
Jun 9, 2001, 1:00 AM MDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Big Horn County, MT, Powder River County, MT, Rosebud County, MT, Treasure County, MT, Yellowstone County, MT, Custer County, SD, Lawrence County, SD, Pennington County, SD, Campbell County, WY, Crook County, WY, Weston County, WY

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 8, 8:23 PM MDTSevere Thunderstorm WarningUNRCampbell52 min
Jun 8, 8:36 PM MDTSevere Thunderstorm WarningBYZYellowstone54 min
Jun 8, 11:16 PM MDTSevere Thunderstorm WarningBYZPowder River44 min
Jun 8, 11:19 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud41 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 2.3 hours before the alert went out and 244 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 00:00Z on 2001-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1061 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 00:00Z on 2001-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
1061 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
1371 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.4
Supercell composite
6.1

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 9, 11:45 AM MDTSevere Thunderstorm WatchSPCCuster, Daniels, Dawson, Fallon, Garfield, McCone and 10 more6 hr
Jun 9, 2:45 PM MDTTornado WatchSPCBig Horn, Carter, Powder River7 hr
Jun 9, 2:45 PM MDTTornado WatchSPCCuster, Dawson, Fallon, Garfield, McCone, Prairie and 4 more7 hr
Jun 9, 3:00 PM MDTSevere Thunderstorm WatchSPCGoshen, Laramie, Platte6 hr

Nearby

Severe Thunderstorm Watches in Montana, 2001Severe Thunderstorm Watches in South Dakota, 2001Severe Thunderstorm Watches in Wyoming, 2001Every severe thunderstorm watch in 2001

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.