Alert archive / Montana / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 457

June 22, 200212 counties in Montana; 8 counties in North Dakota; Harding County, Perkins County, South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 22, 2002, 6:15 PM MDT for 12 counties in Montana; 8 counties in North Dakota; Harding County, Perkins County, South Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 22, 2002, 6:15 PM MDT (00:15 UTC)
Expired
Jun 22, 2002, 11:00 PM MDT
In force
5 hr
Issued by
the Storm Prediction Center
All 22 counties

Carter County, MT, Custer County, MT, Daniels County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND, Harding County, SD, Perkins County, SD

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 22, 6:21 PM MDTSevere Thunderstorm WarningUNRHarding54 min
Jun 22, 6:24 PM MDTSevere Thunderstorm WarningGGWValley66 min
Jun 22, 7:19 PM MDTSevere Thunderstorm WarningBYZCuster56 min
Jun 22, 7:20 PM MDTSevere Thunderstorm WarningUNRHarding55 min
Jun 22, 8:31 PM MDTSevere Thunderstorm WarningBISAdams59 min
Jun 22, 9:06 PM MDTSevere Thunderstorm WarningBISHettinger54 min

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.3 hours before the alert went out and 170 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 00:00Z on 2002-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1898 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 00:00Z on 2002-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.1939Sfc1 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
1898 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1350 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 22, 9:30 PM MDTSevere Thunderstorm WatchSPCBurleigh, Dunn, Emmons, Grant, Kidder, Logan and 8 more5 hr
Jun 23, 1:15 PM MDTSevere Thunderstorm WatchSPCAdams, Billings, Bottineau, Bowman, Burke, Burleigh and 19 more6 hr
Jun 23, 3:00 PM MDTSevere Thunderstorm WatchSPCBarnes, Cass, Dickey, Emmons, Foster, Griggs and 10 more6 hr

Nearby

Severe Thunderstorm Watches in Montana, 2002Severe Thunderstorm Watches in North Dakota, 2002Severe Thunderstorm Watches in South Dakota, 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.