Alert archive / Minnesota / Mesoscale Discussions in 2020

Mesoscale Discussion 1444

August 10, 202018 counties in Minnesota; 10 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2020, 2:30 AM CDT for 18 counties in Minnesota; 10 counties in Wisconsin. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Aug 10, 2020, 2:30 AM CDT (07:30 UTC)
Expired: Aug 10, 2020, 4:00 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 40%

All 28 counties

Anoka County, MN, Carver County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Le Sueur County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Buffalo County, WI, Dunn County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Pepin County, WI, Pierce County, WI, Saint Croix County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The Minneapolis radar (KMPX), 86 km from the middle of the area, began a volume at 07:34 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 00:00Z, 7.5 hours before the alert went out and 88 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: 2342 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1184 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 10.5

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, 8:11 PM CDT	Mesoscale Discussion	SPC	Carver, Dakota, Hennepin, McLeod, Ramsey, Scott and 2 more	94 min
Aug 9, 10:59 PM CDT	Mesoscale Discussion	SPC	Anoka, Blue Earth, Brown, Carver, Chisago, Cottonwood and 32 more	3 hr
Aug 10, 3:19 AM CDT	Mesoscale Discussion	SPC	Rock	116 min
Aug 9, 7:01 PM CDT	Mesoscale Discussion	SPC	Florence, Iron, Vilas	119 min
Aug 10, 6:42 AM CDT	Mesoscale Discussion	SPC	Adams, Columbia, Green Lake, Juneau, La Crosse, Marquette and 6 more	2 hr
Aug 10, 10:42 AM CDT	Mesoscale Discussion	SPC	Crawford, Dane, Grant, Green, Iowa, Jefferson and 10 more	93 min
Aug 10, 11:26 AM CDT	Severe Thunderstorm Watch PDS	SPC	Dane, Grant, Green, Iowa, Jefferson, Kenosha and 6 more	7 hr
Aug 10, 12:44 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calumet, Columbia, Door, Florence and 20 more	61 min
Aug 10, 12:58 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Columbia, Dodge, Door, Fond du Lac and 13 more	6 hr
Aug 10, 1:36 PM CDT	Mesoscale Discussion	SPC	Green, Kenosha, Lafayette, Racine, Rock, Walworth	114 min
Aug 10, 3:36 PM CDT	Mesoscale Discussion	SPC	Kenosha, Milwaukee, Racine, Walworth, Waukesha	84 min
Aug 10, 3:46 PM CDT	Mesoscale Discussion	SPC	Door	89 min

Nearby

Mesoscale Discussions in Minnesota, 2020 Mesoscale Discussions in Wisconsin, 2020 Every mesoscale discussion in 2020

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.