Alert archive / Montana / Mesoscale Discussions in 2007
Mesoscale Discussion 1541
The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2007, 1:46 PM MDT for 25 counties in Montana; 5 counties in Wyoming. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2007, 1:46 PM MDT (19:46 UTC)
- Expired
- Jul 19, 2007, 4:15 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 30 counties
Big Horn County, MT, Blaine County, MT, Carbon County, MT, Cascade County, MT, Chouteau County, MT, Fergus County, MT, Golden Valley County, MT, Hill County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Meagher County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Pondera County, MT, Powell County, MT, Rosebud County, MT, Stillwater County, MT, Sweet Grass County, MT, Teton County, MT, Toole County, MT, Treasure County, MT, Wheatland County, MT, Yellowstone County, MT, Big Horn County, WY, Campbell County, WY, Johnson County, WY, Sheridan County, WY, Washakie County, WY
The radar
The Billings radar (KBLX), 92 km from the middle of the area, began a volume at 19:48 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 12:00Z, 7.8 hours before the alert went out and 143 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
- 463 J/kg
- Mixed-layer CIN
- -358 J/kg
- Mixed-layer LCL
- 2401 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 164 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 18, 7:18 PM MDT | Severe Thunderstorm Watch | SPC | Flathead, Lake, Lincoln, Mineral, Missoula, Sanders | 6 hr |
| Jul 18, 10:11 PM MDT | Mesoscale Discussion | SPC | Flathead, Lake, Lincoln, Mineral, Missoula, Sanders | 94 min |
| Jul 18, 6:15 PM MDT | Mesoscale Discussion | SPC | Crook, Niobrara, Weston | 90 min |
| Jul 19, 12:01 PM MDT | Mesoscale Discussion | SPC | Albany, Laramie, Platte | 3 hr |
Nearby
Mesoscale Discussions in Montana, 2007Mesoscale Discussions in Wyoming, 2007Every mesoscale discussion in 2007
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.