Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 2175

September 12, 200536 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Sep 12, 2005, 7:26 AM CDT for 36 counties in Minnesota. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Sep 12, 2005, 7:26 AM CDT (12:26 UTC)
Expired: Sep 12, 2005, 9:00 AM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 36 counties

Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Cottonwood County, MN, Dakota County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Le Sueur County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Pine County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Swift County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 76 km from the middle of the area, began a volume at 12:28 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 12:00Z, 0.4 hours before the alert went out and 74 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: 858 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1027 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Sep 12, 2:27 PM CDT	Mesoscale Discussion	SPC	Big Stone, Chippewa, Cottonwood, Lac qui Parle, Lincoln, Lyon and 8 more	2 hr
Sep 12, 3:40 PM CDT	Tornado Watch	SPC	Chippewa, Cottonwood, Jackson, Lac qui Parle, Lincoln, Lyon and 6 more	4 hr
Sep 12, 6:47 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Carver, Chippewa, Cottonwood, Faribault and 23 more	88 min

Nearby

Mesoscale Discussions in Minnesota, 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.