Alert archive / Montana / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 636

August 1, 200014 counties in Montana

The Storm Prediction Center issued this severe thunderstorm watch at Aug 1, 2000, 4:00 PM MDT for 14 counties in Montana. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 1, 2000, 4:00 PM MDT (22:00 UTC)
Expired
Aug 1, 2000, 10:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Big Horn County, MT, Blaine County, MT, Carbon County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Rosebud County, MT, Stillwater County, MT, Treasure County, MT, Valley County, MT, Yellowstone County, MT

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Aug 1, 4:10 PM MDTSevere Thunderstorm WarningTFXFergus50 min
Aug 1, 4:44 PM MDTSevere Thunderstorm WarningBYZMusselshell61 min
Aug 1, 4:59 PM MDTSevere Thunderstorm WarningGGWPetroleum61 min
Aug 1, 5:17 PM MDTSevere Thunderstorm WarningBYZYellowstone58 min
Aug 1, 5:25 PM MDTSevere Thunderstorm WarningGGWGarfield65 min
Aug 1, 6:13 PM MDTSevere Thunderstorm WarningBYZBig Horn, Yellowstone62 min
Aug 1, 6:27 PM MDTSevere Thunderstorm WarningGGWGarfield63 min
Aug 1, 6:43 PM MDTSevere Thunderstorm WarningBYZBig Horn, Treasure62 min
Aug 1, 7:04 PM MDTSevere Thunderstorm WarningGGWValley56 min
Aug 1, 7:11 PM MDTSevere Thunderstorm WarningTFXFergus64 min
Aug 1, 7:17 PM MDTSevere Thunderstorm WarningGGWPhillips43 min
Aug 1, 7:21 PM MDTSevere Thunderstorm WarningBYZCuster, Powder River, Rosebud54 min
Aug 1, 7:59 PM MDTSevere Thunderstorm WarningGGWValley61 min
Aug 1, 8:11 PM MDTSevere Thunderstorm WarningGGWPetroleum64 min
Aug 1, 8:13 PM MDTSevere Thunderstorm WarningBYZPowder River, Rosebud92 min

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 10.0 hours before the alert went out and 200 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, Great_falls, MT at 12:00Z on 2000-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 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, Great_falls, MT at 12:00Z on 2000-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
38 J/kg
Mixed-layer CIN
-278 J/kg
Mixed-layer LCL
2886 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
45 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.

Nearby

Severe 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.