Alert archive / Montana / Mesoscale Discussions in 2007
Mesoscale Discussion 1270
The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2007, 6:48 PM MDT for 20 counties in Montana; Crook County, Sheridan County, Wyoming. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2007, 6:48 PM MDT (00:48 UTC)
- Expired
- Jun 24, 2007, 8:15 PM MDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 22 counties
Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Rosebud County, MT, Stillwater County, MT, Treasure County, MT, Wibaux County, MT, Yellowstone County, MT, Crook County, WY, Sheridan County, WY
The radar
The Billings radar (KBLX), 208 km from the middle of the area, began a volume at 00:47 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
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.8 hours before the alert went out and 230 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
- 2580 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 24, 9:47 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Dawson, Fallon, Fergus, Garfield and 8 more | 58 min |
| Jun 24, 10:36 PM MDT | Severe Thunderstorm Watch | SPC | Custer, Dawson, Fallon, Garfield, McCone, Petroleum and 7 more | 7 hr |
| Jun 25, 9:12 AM MDT | Mesoscale Discussion | SPC | Daniels, Phillips, Sheridan, Valley | 93 min |
| Jun 25, 4:48 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Custer, Fallon, Powder River | 8 hr |
| Jun 25, 2:59 PM MDT | Mesoscale Discussion | SPC | Weston | 91 min |
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.