Alert archive / Minnesota / Mesoscale Discussions in 2012
Mesoscale Discussion 881
The Storm Prediction Center issued this mesoscale discussion at May 23, 2012, 5:27 PM CDT for 26 counties in Minnesota; Polk County, Saint Croix County, Wisconsin. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- May 23, 2012, 5:27 PM CDT (22:27 UTC)
- Expired
- May 23, 2012, 7:00 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 28 counties
Anoka County, MN, Blue Earth County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Mower County, MN, Nicollet County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Polk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 39 km from the middle of the area, began a volume at 22:29 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.5 hours before the alert went out and 38 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
- 1960 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 354 m²/s²
- 0-3 km storm-relative helicity
- 362 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 |
|---|---|---|---|---|
| May 22, 8:41 PM CDT | Mesoscale Discussion | SPC | Becker, Clay, Mahnomen, Marshall, Norman, Polk and 3 more | 64 min |
| May 23, 2:04 PM CDT | Mesoscale Discussion | SPC | Aitkin, Becker, Big Stone, Cass, Chippewa, Crow Wing and 14 more | 86 min |
Nearby
Mesoscale Discussions in Minnesota, 2012Mesoscale Discussions in Wisconsin, 2012Every mesoscale discussion in 2012
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.