Alert archive / Minnesota / Mesoscale Discussions in 2008

Mesoscale Discussion 2294

September 26, 200825 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Sep 26, 2008, 5:14 PM CDT for 25 counties in Minnesota. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Sep 26, 2008, 5:14 PM CDT (22:14 UTC)
Expired: Sep 26, 2008, 6:45 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 25 counties

Aitkin County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Koochiching County, MN, Lake County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Otter Tail County, MN, Pine County, MN, Pope County, MN, Saint Louis County, MN, Sherburne County, MN, Stearns County, MN, Todd County, MN, Wadena County, MN, Wright County, MN

The radar

The Duluth radar (KDLH), 127 km from the middle of the area, began a volume at 22:14 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

International Fa, MN (KINL), launched 12:00Z, 10.2 hours before the alert went out and 211 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: 594 J/kg
Mixed-layer CIN: -295 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

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 26, 4:39 AM CDT	Mesoscale Discussion	SPC	Becker, Cass, Hubbard, Itasca, Koochiching, Saint Louis and 1 more	96 min
Sep 26, 10:15 AM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Cass, Clay, Clearwater, Crow Wing and 9 more	90 min
Sep 26, 12:39 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clearwater and 14 more	9 hr
Sep 26, 6:44 PM CDT	Mesoscale Discussion	SPC	Aitkin, Carlton, Cass, Crow Wing, Hubbard, Itasca and 5 more	61 min

Nearby

Mesoscale Discussions in Minnesota, 2008 Every mesoscale discussion in 2008

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.