Alert archive / Minnesota / Mesoscale Discussions in 2015

Mesoscale Discussion 1759

September 5, 201512 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2015, 7:34 PM CDT for 12 counties in Minnesota. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Sep 5, 2015, 7:34 PM CDT (00:34 UTC)
Expired: Sep 5, 2015, 9:00 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Aitkin County, MN, Cass County, MN, Crow Wing County, MN, Douglas County, MN, Hubbard County, MN, Itasca County, MN, Morrison County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 186 km from the middle of the area, began a volume at 00:36 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 00:00Z, 0.6 hours before the alert went out and 260 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: 2088 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 844 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.5

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 6, 2:31 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Beltrami, Benton, Blue Earth, Brown and 51 more	119 min
Sep 6, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Benton, Carlton, Carver, Cass and 33 more	6 hr
Sep 6, 5:12 PM CDT	Mesoscale Discussion	SPC	Fillmore, Houston, Winona	2 hr
Sep 6, 5:26 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Cottonwood, Faribault, Freeborn, Jackson, Martin and 3 more	94 min
Sep 6, 6:02 PM CDT	Severe Thunderstorm Watch	SPC	Fillmore, Houston, Mower	7 hr
Sep 6, 6:29 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Carlton, Carver, Chippewa and 24 more	2 hr

Nearby

Mesoscale Discussions in Minnesota, 2015 Every mesoscale discussion in 2015

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.