Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 2374

October 29, 20044 counties in Minnesota; 4 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Oct 29, 2004, 7:30 PM CDT for 4 counties in Minnesota; 4 counties in Wisconsin. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Oct 29, 2004, 7:30 PM CDT (00:30 UTC)
Expired: Oct 29, 2004, 8:30 PM CDT
In force: 60 min
Issued by: the Storm Prediction Center

Counties Fillmore County, MN, Olmsted County, MN, Pine County, MN, Wabasha County, MN, Burnett County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 79 km from the middle of the area, began a volume at 00:34 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 81 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: 174 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1208 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

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, 9:02 PM CDT	Mesoscale Discussion	SPC	Adams, Chippewa, Clark, Columbia, Crawford, Dane and 24 more	88 min
Oct 29, 10:45 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calumet, Columbia, Dane, Dodge and 29 more	60 min
Oct 29, 10:55 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Dodge, Door, Fond du Lac, Forest and 21 more	4 hr
Oct 30, 1:02 AM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Dodge, Door, Fond du Lac, Jefferson and 14 more	88 min

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.