Alert archive / Wisconsin / Mesoscale Discussions in 2003

Mesoscale Discussion 2022

July 30, 20034 counties in Minnesota; 6 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 30, 2003, 12:26 PM CDT for 4 counties in Minnesota; 6 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 30, 2003, 12:26 PM CDT (17:26 UTC)
Expired: Jul 30, 2003, 2:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Aitkin County, MN, Carlton County, MN, Crow Wing County, MN, Pine County, MN, Barron County, WI, Burnett County, WI, Douglas County, WI, Polk County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 68 km from the middle of the area, began a volume at 17:29 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.

Severe Thunderstorm Watch 816Jul 30, 2:20 PM CDT

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 5.4 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.

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: 528 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 809 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Jul 29, 8:10 PM CDT	Mesoscale Discussion	SPC	Aitkin, Carlton, Cass, Crow Wing, Itasca, Kanabec and 3 more	65 min
Jul 30, 2:06 PM CDT	Mesoscale Discussion	SPC	Houston	114 min
Jul 30, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	Ashland, Barron, Bayfield, Brown, Chippewa, Clark and 26 more	6 hr
Jul 30, 6:22 PM CDT	Mesoscale Discussion	SPC	Adams, Calumet, Columbia, Crawford, Dane, Dodge and 21 more	113 min

Nearby

Mesoscale Discussions in Wisconsin, 2003 Mesoscale Discussions in Minnesota, 2003 Every mesoscale discussion in 2003

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.