Alert archive / Minnesota / Mesoscale Discussions in 2016

Mesoscale Discussion 1343

July 21, 201616 counties in Minnesota; 4 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2016, 2:30 AM CDT for 16 counties in Minnesota; 4 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 21, 2016, 2:30 AM CDT (07:30 UTC)
Expired: Jul 21, 2016, 4:30 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Aitkin County, MN, Benton County, MN, Carlton County, MN, Chisago County, MN, Crow Wing County, MN, Douglas County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Lake County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Saint Louis County, MN, Stearns County, MN, Todd County, MN, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 76 km from the middle of the area, began a volume at 07:32 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, 7.5 hours before the alert went out and 198 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: 2808 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

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
Jul 20, 8:41 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more	6 hr
Jul 20, 11:16 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clearwater, Kittson, Lake of the Woods, Mahnomen and 6 more	59 min
Jul 20, 11:36 PM CDT	Mesoscale Discussion	SPC	Aitkin, Cass, Crow Wing, Itasca, Koochiching, Saint Louis	54 min
Jul 21, 12:32 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 8 more	6 hr
Jul 21, 3:54 AM CDT	Mesoscale Discussion	SPC	Ashland, Bayfield, Burnett, Douglas, Florence, Forest and 8 more	2 hr
Jul 21, 4:31 AM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Door, Florence, Forest, Kewaunee and 12 more	6 hr
Jul 21, 6:39 AM CDT	Mesoscale Discussion	SPC	Buffalo, Clark, Eau Claire, Florence, Forest, Jackson and 15 more	2 hr
Jul 21, 8:28 AM CDT	Mesoscale Discussion	SPC	Calumet, Columbia, Dane, Dodge, Fond du Lac, Green and 16 more	2 hr
Jul 21, 8:45 AM CDT	Severe Thunderstorm Watch	SPC	Columbia, Dodge, Fond du Lac, Green Lake, Jefferson, Marquette and 5 more	7 hr
Jul 21, 11:19 AM CDT	Mesoscale Discussion	SPC	Milwaukee, Racine	116 min
Jul 21, 3:20 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Columbia, Eau Claire, Iowa, Jackson and 9 more	115 min
Jul 21, 4:26 PM CDT	Severe Thunderstorm Watch	SPC	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 13 more	5 hr
Jul 21, 5:42 PM CDT	Mesoscale Discussion	SPC	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 12 more	93 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.