Alert archive / Minnesota / Mesoscale Discussions in 2023

Mesoscale Discussion 271

March 11, 202316 counties in Minnesota; Grand Forks County, Traill County, Walsh County, North Dakota

The Storm Prediction Center issued this mesoscale discussion at Mar 11, 2023, 10:08 AM CST for 16 counties in Minnesota; Grand Forks County, Traill County, Walsh County, North Dakota. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Mar 11, 2023, 10:08 AM CST (16:08 UTC)
Expired: Mar 11, 2023, 2:15 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center
Concerning: Heavy snow

Counties Aitkin County, MN, Becker County, MN, Beltrami County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Hubbard County, MN, Mahnomen County, MN, Marshall County, MN, Morrison County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Wadena County, MN, Grand Forks County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 130 km from the middle of the area, began a volume at 16:09 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 12:00Z, 4.1 hours before the alert went out and 351 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 651 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 536 m²/s²
0-3 km storm-relative helicity: 661 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
Mar 10, 11:08 PM CST	Mesoscale Discussion	SPC	Big Stone, Traverse	5 hr
Mar 11, 4:41 AM CST	Mesoscale Discussion	SPC	Barnes, Burke, Burleigh, Cass, Dickey, Divide and 23 more	6 hr

Nearby

Mesoscale Discussions in Minnesota, 2023 Mesoscale Discussions in North 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.