Alert archive / Montana / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 478

June 22, 200014 counties in Montana; Big Horn County, Park County, Sheridan County, Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jun 22, 2000, 2:15 PM MDT for 14 counties in Montana; Big Horn County, Park County, Sheridan County, Wyoming. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jun 22, 2000, 2:15 PM MDT (20:15 UTC)
Expired
Jun 22, 2000, 10:00 PM MDT
In force
8 hr
Issued by
the Storm Prediction Center

Counties Beaverhead County, MT, Big Horn County, MT, Carbon County, MT, Deer Lodge County, MT, Gallatin County, MT, Jefferson County, MT, Madison County, MT, Park County, MT, Rosebud County, MT, Silver Bow County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Yellowstone County, MT, Big Horn County, WY, Park County, WY, Sheridan County, WY

The radar

The Billings radar (KBLX), 154 km from the middle of the area, began a volume at 20:18 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

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

IssuedProductOfficeCountiesLasted
Jun 22, 2:35 PM MDTSevere Thunderstorm WarningTFXMadison40 min
Jun 22, 2:59 PM MDTSevere Thunderstorm WarningTFXGallatin46 min
Jun 22, 4:14 PM MDTSevere Thunderstorm WarningBYZSheridan61 min
Jun 22, 4:25 PM MDTSevere Thunderstorm WarningBYZRosebud35 min

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 8.3 hours before the alert went out and 214 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 2000-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2000-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -61 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1365 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
-61 m²/s²
0-3 km storm-relative helicity
156 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, 2000Severe Thunderstorm Watches in Wyoming, 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.