Alert archive / Minnesota / Mesoscale Discussions in 2022

Mesoscale Discussion 971

May 30, 202211 counties in Iowa; 12 counties in Minnesota; 6 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 30, 2022, 2:21 AM CDT for 11 counties in Iowa; 12 counties in Minnesota; 6 counties in South Dakota. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: May 30, 2022, 2:21 AM CDT (07:21 UTC)
Expired: May 30, 2022, 3:45 AM CDT
In force: 84 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 290

All 29 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Sioux County, IA, Brown County, MN, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Rock County, MN, Watonwan County, MN, Clay County, SD, Lincoln County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD

The radar

The Sioux Falls radar (KFSD), 46 km from the middle of the area, began a volume at 07:20 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

Aberdeen, SD (KABR), launched 00:00Z, 7.4 hours before the alert went out and 229 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: 1294 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1392 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.6

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
May 29, 11:25 PM CDT	Mesoscale Discussion	SPC	Lyon, Osceola, Sioux	95 min
May 30, 12:03 AM CDT	Severe Thunderstorm Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 9 more	8 hr
May 30, 5:40 AM CDT	Mesoscale Discussion	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 20 more	95 min
May 30, 9:27 AM CDT	Mesoscale Discussion	SPC	Lyon, O'Brien, Osceola, Plymouth, Sioux	93 min
May 30, 11:28 AM CDT	Mesoscale Discussion	SPC	Lyon, Osceola, Plymouth, Sioux	92 min
May 30, 11:49 AM CDT	Tornado Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more	6 hr
May 30, 1:34 PM CDT	Mesoscale Discussion	SPC	Cherokee, Clay, Dickinson, Ida, Lyon, Monona and 5 more	86 min
May 30, 1:55 PM CDT	Mesoscale Discussion	SPC	Adams, Audubon, Cass, Crawford, Fremont, Harrison and 6 more	2 hr
May 30, 5:23 PM CDT	Tornado Watch	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 36 more	5 hr
May 30, 6:51 PM CDT	Mesoscale Discussion	SPC	Dickinson, Osceola	54 min
May 29, 8:31 PM CDT	Mesoscale Discussion	SPC	Beltrami, Kittson, Koochiching, Lake of the Woods, Marshall, Pennington and 2 more	89 min
May 30, 2:03 AM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Cass, Clay, Clearwater, Crow Wing and 7 more	117 min
May 30, 2:46 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 14 more	5 hr
May 30, 4:58 AM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Beltrami, Benton, Carlton, Cass and 20 more	92 min
May 30, 12:55 PM CDT	Mesoscale Discussion	SPC	Benton, Chippewa, Isanti, Kanabec, Kandiyohi, McLeod and 9 more	65 min
May 30, 2:06 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Big Stone, Blue Earth, Brown and 40 more	84 min
May 30, 2:37 PM CDT	Tornado Watch PDS	SPC	Aitkin, Anoka, Becker, Benton, Big Stone, Blue Earth and 51 more	7 hr
May 30, 4:54 PM CDT	Mesoscale Discussion	SPC	Benton, Brown, Cottonwood, Crow Wing, Douglas, Jackson and 13 more	96 min
May 29, 7:16 PM CDT	Tornado Watch	SPC	Aurora, Bon Homme, Charles Mix, Clay, Davison, Douglas and 13 more	8 hr
May 29, 9:16 PM CDT	Mesoscale Discussion	SPC	Aurora, Bon Homme, Charles Mix, Clay, Davison, Douglas and 12 more	89 min

Nearby

Mesoscale Discussions in Minnesota, 2022 Mesoscale Discussions in Iowa, 2022 Mesoscale Discussions in South Dakota, 2022 Every mesoscale discussion in 2022

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.