Alert archive / Wisconsin / Mesoscale Discussions in 2013
Mesoscale Discussion 1801
The Storm Prediction Center issued this mesoscale discussion at Aug 29, 2013, 7:30 PM CDT for Gogebic County, Michigan; 9 counties in Minnesota; 22 counties in Wisconsin. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2013, 7:30 PM CDT (00:30 UTC)
- Expired
- Aug 29, 2013, 9:00 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 32 counties
Gogebic County, MI, Aitkin County, MN, Carlton County, MN, Chisago County, MN, Crow Wing County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Mille Lacs County, MN, Pine County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Iron County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Oneida County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Taylor County, WI, Vilas County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 57 km from the middle of the area, began a volume at 00:33 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 00:00Z, 0.5 hours before the alert went out and 207 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
- 908 J/kg
- Mixed-layer CIN
- -219 J/kg
- Mixed-layer LCL
- 1541 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- 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 |
|---|---|---|---|---|
| Aug 29, 11:57 PM CDT | Mesoscale Discussion | SPC | Gogebic | 93 min |
| Aug 30, 12:24 PM CDT | Mesoscale Discussion | SPC | Allegan, Arenac, Barry, Bay, Clare, Clinton and 29 more | 2 hr |
| Aug 30, 2:07 PM CDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Bay, Berrien, Branch, Calhoun and 27 more | 7 hr |
| Aug 30, 5:14 PM CDT | Mesoscale Discussion | SPC | Allegan, Barry, Bay, Berrien, Branch, Calhoun and 26 more | 61 min |
| Aug 29, 8:20 PM CDT | Tornado Watch | SPC | Aitkin, Carlton, Pine | 5 hr |
Nearby
Mesoscale Discussions in Wisconsin, 2013Mesoscale Discussions in Minnesota, 2013Mesoscale Discussions in Michigan, 2013Every mesoscale discussion in 2013
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.