Alert archive / Minnesota / Mesoscale Discussions in 2009
Mesoscale Discussion 1827
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2009, 3:27 PM CDT for 4 states. It was in force for 33 min.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2009, 3:27 PM CDT (20:27 UTC)
- Expired
- Aug 8, 2009, 4:00 PM CDT
- In force
- 33 min
- Issued by
- the Storm Prediction Center
All 72 counties
Dickinson County, IA, Lyon County, IA, Osceola County, IA, Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Douglas County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Jackson County, MN, Kanabec County, MN, Kandiyohi County, MN, Le Sueur County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Mower County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Olmsted County, MN, Pipestone County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Rock County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Swift County, MN, Todd County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Wright County, MN, Yellow Medicine County, MN, Lincoln County, SD, Minnehaha County, SD, Turner County, SD, Barron County, WI, Buffalo County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI, Trempealeau County, WI
The radar
The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 20:27 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
Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 46 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
- 368 J/kg
- Mixed-layer CIN
- -296 J/kg
- Mixed-layer LCL
- 896 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 237 m²/s²
- 0-3 km storm-relative helicity
- 260 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
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 7, 8:58 PM CDT | Mesoscale Discussion | SPC | Black Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler and 35 more | 92 min |
| Aug 7, 10:14 PM CDT | Severe Thunderstorm Watch | SPC | Black Hawk, Boone, Bremer, Buena Vista, Butler, Calhoun and 27 more | 6 hr |
| Aug 8, 1:29 AM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 37 more | 2 hr |
| Aug 8, 12:16 PM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, Osceola | 29 min |
| Aug 8, 12:47 PM CDT | Tornado Watch | SPC | Lyon, Osceola | 5 hr |
| Aug 8, 9:29 AM CDT | Mesoscale Discussion | SPC | Anoka, Brown, Carver, Dakota, Goodhue, Hennepin and 12 more | 91 min |
| Aug 8, 2:17 PM CDT | Mesoscale Discussion | SPC | Wilkin | 58 min |
| Aug 8, 3:46 PM CDT | Tornado Watch | SPC | Anoka, Benton, Blue Earth, Carver, Chisago, Dakota and 24 more | 8 hr |
| Aug 8, 5:36 PM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 26 more | 84 min |
| Aug 7, 8:29 PM CDT | Mesoscale Discussion | SPC | Buffalo, Haakon, Hughes, Hyde, Jackson, Jones and 3 more | 91 min |
| Aug 7, 8:57 PM CDT | Severe Thunderstorm Watch | SPC | Brule, Buffalo, Charles Mix, Gregory, Hand, Hughes and 8 more | 5 hr |
| Aug 7, 9:53 PM CDT | Mesoscale Discussion | SPC | Butte, Harding, Lawrence, Meade, Pennington, Perkins | 97 min |
| Aug 7, 11:22 PM CDT | Mesoscale Discussion | SPC | Buffalo, Hughes, Hyde, Jones, Lyman, Mellette and 2 more | 83 min |
| Aug 8, 3:18 AM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Custer, Fall River, Haakon, Jackson and 6 more | 117 min |
| Aug 8, 10:52 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bennett, Brookings, Brown, Brule and 36 more | 23 min |
| Aug 8, 11:15 AM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Bon Homme, Brookings, Brown, Brule and 31 more | 4 hr |
Nearby
Mesoscale Discussions in Minnesota, 2009Mesoscale Discussions in Wisconsin, 2009Mesoscale Discussions in Iowa, 2009Every mesoscale discussion in 2009
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.