Alert archive / Montana / Mesoscale Discussions in 2005
Mesoscale Discussion 1957
The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2005, 1:20 PM MDT for Clark County, Fremont County, Teton County, Idaho; 11 counties in Montana; 8 counties in Wyoming. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2005, 1:20 PM MDT (19:20 UTC)
- Expired
- Aug 10, 2005, 2:15 PM MDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 22 counties
Clark County, ID, Fremont County, ID, Teton County, ID, Beaverhead County, MT, Big Horn County, MT, Broadwater County, MT, Carbon County, MT, Gallatin County, MT, Golden Valley County, MT, Madison County, MT, Park County, MT, Stillwater County, MT, Sweet Grass County, MT, Yellowstone County, MT, Big Horn County, WY, Fremont County, WY, Hot Springs County, WY, Natrona County, WY, Park County, WY, Sheridan County, WY, Teton County, WY, Washakie County, WY
The radar
The Billings radar (KBLX), 113 km from the middle of the area, began a volume at 19:23 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
Riverton, WY (KRIW), launched 12:00Z, 7.3 hours before the alert went out and 250 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
- 6 J/kg
- Mixed-layer CIN
- -307 J/kg
- Mixed-layer LCL
- 1731 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Aug 10, 1:35 PM MDT | Severe Thunderstorm Watch | SPC | Carbon, Golden Valley, Meagher, Musselshell, Park, Stillwater and 3 more | 6 hr |
| Aug 10, 4:32 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carbon, Golden Valley, Meagher, Musselshell, Park and 4 more | 88 min |
| Aug 10, 1:10 PM MDT | Mesoscale Discussion | SPC | Converse, Crook, Goshen, Laramie, Niobrara, Platte and 1 more | 65 min |
| Aug 10, 1:50 PM MDT | Severe Thunderstorm Watch | SPC | Campbell, Converse, Goshen, Laramie, Niobrara, Platte and 1 more | 7 hr |
| Aug 10, 4:09 PM MDT | Mesoscale Discussion | SPC | Campbell, Converse, Goshen, Laramie, Niobrara, Platte and 1 more | 66 min |
Nearby
Mesoscale Discussions in Montana, 2005Mesoscale Discussions in Wyoming, 2005Mesoscale Discussions in Idaho, 2005Every mesoscale discussion in 2005
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.