Alert archive / Idaho / Mesoscale Discussions in 2012

Mesoscale Discussion 1062

June 4, 201215 counties in Idaho; 7 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2012, 7:42 PM MDT for 15 counties in Idaho; 7 counties in Montana. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 4, 2012, 7:42 PM MDT (01:42 UTC)
Expired: Jun 4, 2012, 9:15 PM MDT
In force: 93 min
Issued by: the Storm Prediction Center

All 22 counties

Adams County, ID, Benewah County, ID, Boise County, ID, Bonner County, ID, Boundary County, ID, Clearwater County, ID, Gem County, ID, Idaho County, ID, Kootenai County, ID, Latah County, ID, Lemhi County, ID, Lewis County, ID, Nez Perce County, ID, Shoshone County, ID, Valley County, ID, Granite County, MT, Lake County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Ravalli County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 157 km from the middle of the area, began a volume at 01:42 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.

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 1.7 hours before the alert went out and 189 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1397 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 10:08 PM MDT	Mesoscale Discussion	SPC	Clearwater, Idaho, Shoshone	67 min
Jun 5, 11:46 AM MDT	Mesoscale Discussion	SPC	Bear Lake	2 hr
Jun 5, 12:54 PM MDT	Mesoscale Discussion	SPC	Fremont, Teton	2 hr
Jun 4, 6:02 PM MDT	Tornado Watch	SPC	Blaine, Cascade, Chouteau, Fergus, Glacier, Hill and 6 more	7 hr
Jun 4, 8:22 PM MDT	Mesoscale Discussion	SPC	Blaine, Chouteau, Fergus, Hill, Petroleum, Phillips and 1 more	83 min
Jun 4, 10:48 PM MDT	Mesoscale Discussion	SPC	Liberty, Pondera, Teton, Toole	57 min
Jun 5, 1:37 PM MDT	Severe Thunderstorm Watch	SPC	Broadwater, Carbon, Gallatin, Golden Valley, Jefferson, Madison and 5 more	7 hr
Jun 5, 1:56 PM MDT	Mesoscale Discussion	SPC	Blaine, Cascade, Chouteau, Fergus, Glacier, Hill and 8 more	2 hr
Jun 5, 2:37 PM MDT	Tornado Watch	SPC	Blaine, Cascade, Chouteau, Fergus, Glacier, Hill and 6 more	8 hr
Jun 5, 4:21 PM MDT	Mesoscale Discussion	SPC	Broadwater, Golden Valley, Meagher, Stillwater, Sweet Grass, Wheatland	84 min
Jun 5, 4:48 PM MDT	Mesoscale Discussion	SPC	Cascade, Chouteau, Fergus, Glacier, Golden Valley, Judith Basin and 6 more	87 min

Nearby

Mesoscale Discussions in Idaho, 2012 Mesoscale Discussions in Montana, 2012 Every mesoscale discussion in 2012

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.