Alert archive / Wisconsin / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 679
The Storm Prediction Center issued this severe thunderstorm watch at Aug 1, 2004, 4:00 PM CDT for 9 counties in Minnesota; 12 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 1, 2004, 4:00 PM CDT (21:00 UTC)
- Expired
- Aug 1, 2004, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Aitkin County, MN, Benton County, MN, Chisago County, MN, Crow Wing County, MN, Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Barron County, WI, Burnett County, WI, Douglas County, WI, Iron County, WI, Lincoln County, WI, Oneida County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Vilas County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 83 km from the middle of the area, began a volume at 21:04 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.
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:47 PM CDT | Severe Thunderstorm Warning | DLH | Price | 58 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.0 hours before the alert went out and 167 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
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, 3:41 PM CDT | Mesoscale Discussion | SPC | Kanabec, Mille Lacs, Morrison, Pine | 2 hr |
| Aug 1, 6:25 PM CDT | Mesoscale Discussion | SPC | Langlade, Lincoln, Menominee, Oneida, Price, Shawano | 65 min |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2004Severe Thunderstorm Watches in Minnesota, 2004Every severe thunderstorm watch 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.