Alert archive / Minnesota / Mesoscale Discussions in 2023

Mesoscale Discussion 1939

August 10, 202313 counties in Minnesota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2023, 9:05 PM CDT for 13 counties in Minnesota; 4 counties in South Dakota. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Aug 10, 2023, 9:05 PM CDT (02:05 UTC)
Expired: Aug 10, 2023, 11:00 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 623...624

Counties Big Stone County, MN, Brown County, MN, Chippewa County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Meeker County, MN, Redwood County, MN, Renville County, MN, Stevens County, MN, Swift County, MN, Yellow Medicine County, MN, Brookings County, SD, Deuel County, SD, Lake County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 151 km from the middle of the area, began a volume at 02:07 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, 2.1 hours before the alert went out and 189 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: 43 J/kg
Mixed-layer CIN: -213 J/kg
Mixed-layer LCL: 1262 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Aug 10, 7:44 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Chippewa, Cottonwood, Faribault, Jackson and 22 more	6 hr
Aug 10, 11:26 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Carver, Faribault, Jackson, Le Sueur and 7 more	2 hr
Aug 11, 1:56 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Carlton, Carver, Chisago and 32 more	2 hr
Aug 11, 2:28 PM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Carver, Chisago, Dakota, Dodge and 26 more	8 hr
Aug 11, 4:00 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Blue Earth, Brown, Carver, Chisago and 27 more	2 hr
Aug 11, 4:46 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Cottonwood, Faribault, Freeborn, Jackson and 7 more	5 hr
Aug 11, 6:42 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Dakota, Dodge, Faribault, Fillmore, Freeborn and 11 more	63 min

Nearby

Mesoscale Discussions in Minnesota, 2023 Mesoscale Discussions in South Dakota, 2023 Every mesoscale discussion in 2023

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.