Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 1939

August 7, 200525 counties in Minnesota; 4 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2005, 7:54 PM CDT for 25 counties in Minnesota; 4 counties in Wisconsin. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Aug 7, 2005, 7:54 PM CDT (00:54 UTC)
Expired: Aug 7, 2005, 9:00 PM CDT
In force: 66 min
Issued by: the Storm Prediction Center

All 29 counties

Aitkin County, MN, Anoka County, MN, Benton County, MN, Carlton County, MN, Carver County, MN, Chisago County, MN, Crow Wing County, MN, Dakota County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Ramsey County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Todd County, MN, Wadena County, MN, Washington County, MN, Wright County, MN, Burnett County, WI, Pierce County, WI, Polk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 71 km from the middle of the area, began a volume at 00:56 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, 0.9 hours before the alert went out and 71 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: 3207 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1389 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 7.8

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
Aug 8, 4:51 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Brown, Carver, Chippewa, Chisago and 25 more	114 min
Aug 8, 5:25 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 34 more	6 hr
Aug 8, 9:45 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 34 more	90 min
Aug 8, 5:51 PM CDT	Mesoscale Discussion	SPC	Chippewa, Lac qui Parle, Lincoln, Lyon, Swift, Yellow Medicine	84 min

Nearby

Mesoscale Discussions in Minnesota, 2005 Mesoscale Discussions in Wisconsin, 2005 Every mesoscale discussion in 2005

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.