Alert archive / Montana / Mesoscale Discussions in 2005
Mesoscale Discussion 1426
The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2005, 2:50 PM MDT for 21 counties in Montana. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Jun 22, 2005, 2:50 PM MDT (20:50 UTC)
- Expired
- Jun 22, 2005, 4:45 PM MDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
All 21 counties
Blaine County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Fergus County, MT, Gallatin County, MT, Garfield County, MT, Golden Valley County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Meagher County, MT, Musselshell County, MT, Park County, MT, Petroleum County, MT, Phillips County, MT, Stillwater County, MT, Sweet Grass County, MT, Wheatland County, MT, Yellowstone County, MT
The radar
The Great Falls radar (KTFX), 86 km from the middle of the area, began a volume at 20:53 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, 8.8 hours before the alert went out and 56 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
- 2428 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 81 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 21, 6:32 PM MDT | Mesoscale Discussion | SPC | Custer, Garfield, McCone, Petroleum, Phillips, Prairie and 2 more | 88 min |
| Jun 21, 7:00 PM MDT | Severe Thunderstorm Watch | SPC | Custer, Daniels, Dawson, Fallon, Garfield, McCone and 11 more | 7 hr |
| Jun 21, 9:32 PM MDT | Mesoscale Discussion | SPC | Cascade, Chouteau, Hill, Lewis and Clark, Liberty, Pondera and 3 more | 58 min |
| Jun 21, 10:26 PM MDT | Mesoscale Discussion | SPC | Custer, Daniels, Dawson, Fallon, Garfield, McCone and 9 more | 64 min |
| Jun 22, 1:15 AM MDT | Mesoscale Discussion | SPC | Carter, Custer, Daniels, Dawson, Fallon, Garfield and 14 more | 60 min |
| Jun 22, 3:50 PM MDT | Severe Thunderstorm Watch | SPC | Blaine, Broadwater, Cascade, Chouteau, Daniels, Fergus and 20 more | 7 hr |
Nearby
Mesoscale Discussions in Montana, 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.