Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 2368

October 29, 200429 counties in Minnesota; 14 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Oct 29, 2004, 3:19 PM CDT for 29 counties in Minnesota; 14 counties in Wisconsin. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Oct 29, 2004, 3:19 PM CDT (20:19 UTC)
Expired: Oct 29, 2004, 5:15 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center

All 43 counties

Anoka County, MN, Benton County, MN, Blue Earth County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Le Sueur County, MN, McLeod County, MN, Mille Lacs County, MN, Nicollet County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Wright County, MN, Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Trempealeau County, WI, Washburn County, WI

The radar

The Minneapolis radar (KMPX), 112 km from the middle of the area, began a volume at 20:22 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, 8.3 hours before the alert went out and 115 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1021 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 508 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 29, 10:08 AM CDT	Mesoscale Discussion	SPC	Big Stone, Grant, Lac qui Parle, Pope, Stevens, Swift and 1 more	3 hr
Oct 29, 2:12 PM CDT	Mesoscale Discussion	SPC	Faribault, Jackson, Martin	3 hr
Oct 29, 2:57 PM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Carlton, Cass, Clay, Crow Wing and 10 more	3 hr
Oct 29, 3:35 PM CDT	Tornado Watch	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 34 more	5 hr
Oct 29, 5:46 PM CDT	Mesoscale Discussion	SPC	Houston, Winona	89 min
Oct 29, 6:10 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Chisago, Dakota, Dodge, Fillmore and 18 more	95 min
Oct 29, 6:30 PM CDT	Tornado Watch	SPC	Fillmore, Houston, Winona	6 hr

Nearby

Mesoscale Discussions in Minnesota, 2004 Mesoscale Discussions in Wisconsin, 2004 Every 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.