Alert archive / Idaho / Mesoscale Discussions in 2012
Mesoscale Discussion 1057
The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2012, 4:45 PM MDT for 4 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2012, 4:45 PM MDT (22:45 UTC)
- Expired
- Jun 4, 2012, 6:15 PM MDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 34 counties
Ada County, ID, Adams County, ID, Benewah County, ID, Boise County, ID, Canyon County, ID, Clearwater County, ID, Gem County, ID, Idaho County, ID, Kootenai County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Payette County, ID, Shoshone County, ID, Valley County, ID, Washington County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT, Baker County, OR, Malheur County, OR, Union County, OR, Wallowa County, OR, Asotin County, WA, Garfield County, WA, Spokane County, WA, Whitman County, WA
The radar
The Missoula radar (KMSX), 173 km from the middle of the area, began a volume at 22:46 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 10.8 hours before the alert went out and 193 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.
- Mixed-layer CAPE
- 5 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 12:49 PM MDT | Mesoscale Discussion | SPC | Adams, Benewah, Bonner, Boundary, Clearwater, Gem and 9 more | 86 min |
| Jun 4, 1:46 PM MDT | Severe Thunderstorm Watch | SPC | Ada, Adams, Benewah, Boise, Bonner, Boundary and 16 more | 10 hr |
| Jun 4, 2:17 PM MDT | Mesoscale Discussion | SPC | Beaverhead, Blaine, Broadwater, Carbon, Cascade, Chouteau and 19 more | 88 min |
| Jun 4, 4:32 PM MDT | Severe Thunderstorm Watch | SPC | Beaverhead, Blaine, Broadwater, Carbon, Cascade, Chouteau and 20 more | 6 hr |
| Jun 4, 5:28 PM MDT | Mesoscale Discussion | SPC | Blaine, Broadwater, Cascade, Chouteau, Fergus, Hill and 8 more | 62 min |
Nearby
Mesoscale Discussions in Idaho, 2012Mesoscale Discussions in Montana, 2012Mesoscale Discussions in Oregon, 2012Every 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.