Alert archive / Montana / Mesoscale Discussions in 2004
Mesoscale Discussion 1618
The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2004, 1:52 PM MDT for 25 counties in Montana; Sheridan County, Wyoming. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2004, 1:52 PM MDT (19:52 UTC)
- Expired
- Jul 11, 2004, 3:15 PM MDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 26 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, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, Judith Basin County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Powder River County, MT, Prairie County, MT, Rosebud County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Valley County, MT, Wheatland County, MT, Yellowstone County, MT, Sheridan County, WY
The radar
The Billings radar (KBLX), 64 km from the middle of the area, began a volume at 19:55 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
Great_falls, MT (KTFX), launched 12:00Z, 7.9 hours before the alert went out and 218 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
- 1436 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 286 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 10, 6:56 PM MDT | Mesoscale Discussion | SPC | Blaine, Carter, Cascade, Chouteau, Custer, Dawson and 21 more | 94 min |
| Jul 10, 9:40 PM MDT | Mesoscale Discussion | SPC | Dawson, Prairie, Wibaux | 2 hr |
| Jul 10, 11:40 PM MDT | Mesoscale Discussion | SPC | Custer, Dawson, Fallon, Garfield, Prairie, Rosebud and 1 more | 35 min |
| Jul 11, 11:48 AM MDT | Mesoscale Discussion | SPC | Blaine, Carter, Custer, Daniels, Dawson, Fallon and 8 more | 117 min |
| Jul 11, 2:40 PM MDT | Severe Thunderstorm Watch | SPC | Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 12 more | 6 hr |
| Jul 11, 5:34 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 14 more | 86 min |
Nearby
Mesoscale Discussions in Montana, 2004Mesoscale Discussions in Wyoming, 2004Every mesoscale discussion in 2004
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.