Alert archive / Minnesota / Mesoscale Discussions in 2011
Mesoscale Discussion 1506
The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2011, 10:42 PM CDT for 25 counties in Minnesota; Ransom County, Richland County, Sargent County, North Dakota; Ashland County, Bayfield County, Douglas County, Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 4, 2011, 10:42 PM CDT (03:42 UTC)
- Expired
- Jul 5, 2011, 12:45 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 31 counties
Aitkin County, MN, Becker County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Cook County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Kanabec County, MN, Lake County, MN, Mille Lacs County, MN, Morrison County, MN, Otter Tail County, MN, Pine County, MN, Pope County, MN, Saint Louis County, MN, Stearns County, MN, Stevens County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Ransom County, ND, Richland County, ND, Sargent County, ND, Ashland County, WI, Bayfield County, WI, Douglas County, WI
The radar
The Duluth radar (KDLH), 63 km from the middle of the area, began a volume at 03:43 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
International Fa, MN (KINL), launched 00:00Z, 3.7 hours before the alert went out and 168 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
- 1540 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1783 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 4, 7:14 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Beltrami, Benton, Carlton, Cass and 38 more | 9 hr |
| Jul 4, 11:41 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Cottonwood, Lincoln, Lyon, Murray, Pipestone and 1 more | 5 hr |
| Jul 5, 12:29 PM CDT | Mesoscale Discussion | SPC | Houston | 91 min |
| Jul 5, 3:32 PM CDT | Mesoscale Discussion | SPC | Nobles, Rock | 88 min |
Nearby
Mesoscale Discussions in Minnesota, 2011Mesoscale Discussions in North Dakota, 2011Mesoscale Discussions in Wisconsin, 2011Every mesoscale discussion in 2011
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.