Alert archive / Montana / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 485

June 29, 200226 counties in Montana

The Storm Prediction Center issued this severe thunderstorm watch at Jun 29, 2002, 2:00 PM MDT for 26 counties in Montana. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 29, 2002, 2:00 PM MDT (20:00 UTC)
Expired
Jun 29, 2002, 8:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
All 26 counties

Big Horn County, MT, Blaine County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Daniels County, MT, Dawson County, MT, Fallon County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Rosebud County, MT, Sheridan County, MT, Stillwater County, MT, Treasure County, MT, Valley County, MT, Wibaux County, MT, Yellowstone County, MT

The radar

The Glasgow radar (KGGW), 99 km from the middle of the area, began a volume at 20:00 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

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

IssuedProductOfficeCountiesLasted
Jun 29, 2:36 PM MDTSevere Thunderstorm WarningBYZGolden Valley, Musselshell54 min
Jun 29, 3:13 PM MDTSevere Thunderstorm WarningBYZStillwater32 min
Jun 29, 3:13 PM MDTSevere Thunderstorm WarningGGWPhillips, Valley62 min
Jun 29, 3:50 PM MDTSevere Thunderstorm WarningGGWMcCone55 min
Jun 29, 4:04 PM MDTSevere Thunderstorm WarningGGWMcCone41 min
Jun 29, 4:07 PM MDTSevere Thunderstorm WarningGGWRoosevelt53 min
Jun 29, 4:15 PM MDTSevere Thunderstorm WarningGGWDaniels, Valley60 min
Jun 29, 4:43 PM MDTSevere Thunderstorm WarningGGWPrairie62 min
Jun 29, 4:49 PM MDTSevere Thunderstorm WarningGGWMcCone56 min
Jun 29, 4:53 PM MDTSevere Thunderstorm WarningGGWDawson, Richland67 min
Jun 29, 5:02 PM MDTSevere Thunderstorm WarningGGWRoosevelt58 min
Jun 29, 5:10 PM MDTSevere Thunderstorm WarningBYZBig Horn, Custer, Powder River, Rosebud65 min
Jun 29, 5:44 PM MDTSevere Thunderstorm WarningBYZFallon61 min
Jun 29, 5:54 PM MDTSevere Thunderstorm WarningGGWDaniels66 min
Jun 29, 5:56 PM MDTSevere Thunderstorm WarningGGWRichland, Wibaux64 min
Jun 29, 6:04 PM MDTSevere Thunderstorm WarningGGWDawson56 min

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 8.0 hours before the alert went out and 101 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, Glasgow Intl Airport, MT at 12:00Z on 2002-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 80 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, Glasgow Intl Airport, MT at 12:00Z on 2002-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 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
80 J/kg
Mixed-layer CIN
-468 J/kg
Mixed-layer LCL
2641 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

Nearby

Severe Thunderstorm Watches in Montana, 2002Every severe thunderstorm watch in 2002

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.