Alert archive / Wisconsin / Mesoscale Discussions in 2004
Mesoscale Discussion 1819
The Storm Prediction Center issued this mesoscale discussion at Aug 1, 2004, 3:41 PM CDT for 4 counties in Minnesota; 9 counties in Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 1, 2004, 3:41 PM CDT (20:41 UTC)
- Expired
- Aug 1, 2004, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Burnett County, WI, Douglas County, WI, Langlade County, WI, Lincoln County, WI, Oneida County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 132 km from the middle of the area, began a volume at 20:41 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, 8.7 hours before the alert went out and 181 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
- 665 J/kg
- Mixed-layer CIN
- -151 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 204 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 |
|---|---|---|---|---|
| Jul 31, 8:19 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Brown, Cottonwood, Dodge, Faribault, Fillmore and 15 more | 56 min |
| Jul 31, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | Blue Earth, Brown, Cottonwood, Dakota, Dodge, Faribault and 22 more | 5 hr |
| Jul 31, 11:41 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Dakota, Dodge, Faribault, Fillmore, Freeborn and 14 more | 64 min |
| Aug 1, 5:56 AM CDT | Mesoscale Discussion | SPC | Faribault, Freeborn, Jackson, Martin, Mower, Nobles | 94 min |
| Aug 1, 1:48 PM CDT | Mesoscale Discussion | SPC | Big Stone, Brown, Chippewa, Cottonwood, Jackson, Kandiyohi and 20 more | 117 min |
| Aug 1, 3:15 PM CDT | Tornado Watch | SPC | Big Stone, Brown, Chippewa, Cottonwood, Douglas, Grant and 21 more | 7 hr |
| Aug 1, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Benton, Chisago, Crow Wing, Isanti, Kanabec and 3 more | 5 hr |
| Aug 1, 6:25 PM CDT | Mesoscale Discussion | SPC | Langlade, Lincoln, Menominee, Oneida, Price, Shawano | 65 min |
Nearby
Mesoscale Discussions in Wisconsin, 2004Mesoscale Discussions in Minnesota, 2004Every mesoscale discussion in 2004
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.