Alert archive / Minnesota / Mesoscale Discussions in 2008
Mesoscale Discussion 1909
The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2008, 12:56 PM EDT for 8 counties in Michigan; 9 counties in Minnesota; 9 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 25, 2008, 12:56 PM EDT (16:56 UTC)
- Expired
- Jul 25, 2008, 3:00 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Baraga County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Marquette County, MI, Ontonagon County, MI, Aitkin County, MN, Benton County, MN, Carlton County, MN, Cook County, MN, Kanabec County, MN, Lake County, MN, Mille Lacs County, MN, Pine County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Florence County, WI, Iron County, WI, Sawyer County, WI, Vilas County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 145 km from the middle of the area, began a volume at 16:58 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, 4.9 hours before the alert went out and 375 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
- 1404 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 503 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.6
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 25, 2:19 PM EDT | Severe Thunderstorm Watch | SPC | Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 7 more | 8 hr |
| Jul 25, 4:38 PM EDT | Mesoscale Discussion | SPC | Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 8 more | 97 min |
| Jul 25, 6:16 PM EDT | Mesoscale Discussion | SPC | Antrim, Charlevoix, Cheboygan, Chippewa, Emmet, Leelanau and 4 more | 59 min |
| Jul 25, 5:45 PM EDT | Severe Thunderstorm Watch | SPC | Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more | 4 hr |
Nearby
Mesoscale Discussions in Minnesota, 2008Mesoscale Discussions in Wisconsin, 2008Mesoscale Discussions in Michigan, 2008Every mesoscale discussion in 2008
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.