Alert archive / Montana / Mesoscale Discussions in 2008
Mesoscale Discussion 1868
The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2008, 8:03 PM MDT for 33 counties in Montana; Golden Valley County, North Dakota; 4 counties in Wyoming. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jul 22, 2008, 8:03 PM MDT (02:03 UTC)
- Expired
- Jul 22, 2008, 9:30 PM MDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 38 counties
Big Horn County, MT, Blaine County, MT, Carbon County, MT, Carter County, MT, Chouteau County, MT, Custer County, MT, Daniels County, MT, Dawson County, MT, Fallon County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, Hill County, MT, Judith Basin County, MT, Liberty 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, Sweet Grass County, MT, Toole County, MT, Treasure County, MT, Valley County, MT, Wheatland County, MT, Wibaux County, MT, Yellowstone County, MT, Golden Valley County, ND, Big Horn County, WY, Park County, WY, Sheridan County, WY, Teton County, WY
The radar
The Billings radar (KBLX), 92 km from the middle of the area, began a volume at 01:54 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
Great_falls, MT (KTFX), launched 00:00Z, 2.1 hours before the alert went out and 246 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1774 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 502 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 |
|---|---|---|---|---|
| Jul 22, 6:20 PM MDT | Mesoscale Discussion | SPC | Gallatin, Madison, Park | 55 min |
| Jul 22, 9:54 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Dawson, Fallon, Garfield, McCone and 7 more | 96 min |
| Jul 23, 12:32 AM MDT | Mesoscale Discussion | SPC | Big Horn, Carter, Custer, Fallon, Powder River, Rosebud and 1 more | 58 min |
| Jul 23, 1:03 AM MDT | Severe Thunderstorm Watch | SPC | Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 2 more | 7 hr |
| Jul 23, 1:22 PM MDT | Mesoscale Discussion | SPC | Richland, Wibaux | 113 min |
| Jul 23, 5:24 PM MDT | Mesoscale Discussion | SPC | Burleigh, Dickey, Emmons, Kidder, LaMoure, Logan and 3 more | 2 hr |
| Jul 23, 5:51 PM MDT | Severe Thunderstorm Watch | SPC | Burleigh, Dickey, Emmons, Foster, Kidder, LaMoure and 6 more | 4 hr |
Nearby
Mesoscale Discussions in Montana, 2008Mesoscale Discussions in Wyoming, 2008Mesoscale Discussions in North Dakota, 2008Every mesoscale discussion in 2008
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.