Alert archive / Minnesota / Mesoscale Discussions in 2012
Mesoscale Discussion 1420
The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2012, 6:02 PM CDT for 38 counties in Minnesota; 10 counties in South Dakota; 9 counties in Wisconsin. It was in force for 28 min.
The area
The outline as issued.
The facts
- Issued
- Jul 6, 2012, 6:02 PM CDT (23:02 UTC)
- Expired
- Jul 6, 2012, 6:30 PM CDT
- In force
- 28 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 57 counties
Anoka County, MN, Benton County, MN, Brown County, MN, Carlton County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Douglas County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Pine County, MN, Pipestone County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Washington County, MN, Wright County, MN, Yellow Medicine County, MN, Bon Homme County, SD, Brookings County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, McCook County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Yankton County, SD, Barron County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Minneapolis radar (KMPX), 64 km from the middle of the area, began a volume at 23:06 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, 11.0 hours before the alert went out and 61 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
- 2912 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 925 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 137 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 |
|---|---|---|---|---|
| Jul 6, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | Anoka, Blue Earth, Brown, Carver, Chisago, Dakota and 22 more | 7 hr |
| Jul 5, 9:52 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Fall River, Harding, Lawrence, Meade and 2 more | 53 min |
Nearby
Mesoscale Discussions in Minnesota, 2012Mesoscale Discussions in South Dakota, 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.