Alert archive / Minnesota / Mesoscale Discussions in 2016

Mesoscale Discussion 1515

August 10, 201619 counties in Minnesota; 4 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2016, 4:04 PM CDT for 19 counties in Minnesota; 4 counties in Wisconsin. It was in force for 26 min.

The area

The outline as issued.

The facts

Issued: Aug 10, 2016, 4:04 PM CDT (21:04 UTC)
Expired: Aug 10, 2016, 4:30 PM CDT
In force: 26 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 23 counties

Anoka County, MN, Benton County, MN, Carver County, MN, Chisago County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi 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, Stearns County, MN, Washington County, MN, Wright County, MN, Barron County, WI, Burnett County, WI, Polk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 73 km from the middle of the area, began a volume at 21:04 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 440Aug 10, 4:20 PM CDT

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.1 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: 537 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 10:19 PM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Chippewa, Clay, Douglas, Grant, Lac qui Parle and 8 more	8 hr
Aug 10, 1:05 AM CDT	Mesoscale Discussion	SPC	Big Stone, Lac qui Parle, Swift, Traverse	55 min
Aug 10, 3:30 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Big Stone, Chisago, Douglas, Grant and 20 more	60 min
Aug 10, 4:02 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Benton, Cass, Chisago, Crow Wing, Isanti and 7 more	4 hr
Aug 10, 11:19 AM CDT	Mesoscale Discussion	SPC	Becker, Clay, Otter Tail, Wilkin	2 hr
Aug 10, 1:15 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Big Stone, Clay, Douglas, Grant, Lac qui Parle and 8 more	7 hr
Aug 10, 3:45 PM CDT	Mesoscale Discussion	SPC	Becker, Big Stone, Cass, Chippewa, Clay, Crow Wing and 14 more	2 hr
Aug 10, 3:52 PM CDT	Mesoscale Discussion	SPC	Jackson	113 min
Aug 10, 4:20 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Benton, Carlton, Carver, Cass and 17 more	5 hr
Aug 10, 6:54 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Carlton, Cass, Chisago and 15 more	66 min

Nearby

Mesoscale Discussions in Minnesota, 2016 Mesoscale Discussions in Wisconsin, 2016 Every mesoscale discussion in 2016

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.