Alert archive / Minnesota / Mesoscale Discussions in 2011
Mesoscale Discussion 1826
The Storm Prediction Center issued this mesoscale discussion at Aug 1, 2011, 9:40 PM CDT for 4 states. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Aug 1, 2011, 9:40 PM CDT (02:40 UTC)
- Expired
- Aug 1, 2011, 11:15 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 72 counties
Aitkin County, MN, Anoka County, MN, Becker County, MN, Benton County, MN, Big Stone County, MN, Carlton County, MN, Cass County, MN, Chippewa County, MN, Chisago County, MN, Clay County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Otter Tail County, MN, Pine County, MN, Pope County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Wright County, MN, Yellow Medicine County, MN, Richland County, ND, Sargent County, ND, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Haakon County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lake County, SD, Lyman County, SD, Marshall County, SD, Mellette County, SD, Miner County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Tripp County, SD, Burnett County, WI, Douglas County, WI, Polk County, WI, Washburn County, WI
The radar
The Aberdeen radar (KABR), 84 km from the middle of the area, began a volume at 02:41 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
Aberdeen, SD (KABR), launched 00:00Z, 2.7 hours before the alert went out and 66 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
- 4798 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1973 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 8.3
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 |
|---|---|---|---|---|
| Aug 1, 10:35 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Carlton, Cass, Clay, Crow Wing and 11 more | 7 hr |
| Aug 2, 1:24 AM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Benton, Carlton, Chisago, Crow Wing and 5 more | 96 min |
| Aug 2, 3:32 AM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Benton, Carlton, Chisago, Crow Wing and 5 more | 88 min |
| Aug 2, 5:23 AM CDT | Severe Thunderstorm Watch | SPC | Anoka, Benton, Big Stone, Carver, Chippewa, Chisago and 25 more | 7 hr |
| Aug 2, 9:02 AM CDT | Mesoscale Discussion | SPC | Chisago, Ramsey, Washington | 58 min |
| Aug 2, 12:57 PM CDT | Mesoscale Discussion | SPC | Houston | 93 min |
| Aug 2, 12:42 AM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Brookings, Brule, Buffalo, Charles Mix and 22 more | 5 hr |
| Aug 2, 2:20 AM CDT | Severe Thunderstorm Watch | SPC | Ashland, Barron, Bayfield, Burnett, Chippewa, Clark and 24 more | 10 hr |
| Aug 2, 6:19 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calumet, Chippewa, Clark, Columbia and 32 more | 86 min |
| Aug 2, 11:51 AM CDT | Mesoscale Discussion | SPC | Ashland, Barron, Bayfield, Burnett, Chippewa, Douglas and 11 more | 24 min |
| Aug 2, 5:22 PM CDT | Severe Thunderstorm Watch | SPC | Kenosha, Milwaukee, Racine, Rock, Walworth, Waukesha | 9 hr |
Nearby
Mesoscale Discussions in Minnesota, 2011Mesoscale Discussions in South 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.