Alert archive / Minnesota / Mesoscale Discussions in 2020

Mesoscale Discussion 1485

August 14, 202011 counties in Minnesota; 7 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 14, 2020, 6:06 AM CDT for 11 counties in Minnesota; 7 counties in North Dakota. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Aug 14, 2020, 6:06 AM CDT (11:06 UTC)
Expired: Aug 14, 2020, 8:00 AM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...severe thunderstorm watch likely
Chance of a watch: 80%

Counties Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Griggs County, ND, Ransom County, ND, Steele County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 73 km from the middle of the area, began a volume at 11:06 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 435Aug 14, 6:40 AM CDT

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 11.1 hours before the alert went out and 261 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: 1650 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.2

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 13, 8:26 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Hubbard, Koochiching and 11 more	94 min
Aug 14, 12:33 AM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Benton, Cass, Crow Wing, Douglas and 15 more	87 min
Aug 14, 6:41 AM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 8 more	7 hr
Aug 14, 10:19 AM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Douglas, Grant and 9 more	86 min
Aug 14, 1:57 PM CDT	Mesoscale Discussion	SPC	Benton, Big Stone, Blue Earth, Brown, Carver, Chippewa and 38 more	2 hr
Aug 14, 2:17 PM CDT	Severe Thunderstorm Watch	SPC	Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more	6 hr
Aug 14, 2:36 PM CDT	Tornado Watch	SPC	Benton, Big Stone, Brown, Chippewa, Douglas, Grant and 18 more	5 hr
Aug 14, 4:53 PM CDT	Mesoscale Discussion	SPC	Big Stone, Chippewa, Douglas, Grant, Kandiyohi, Lac qui Parle and 15 more	97 min
Aug 14, 5:35 PM CDT	Mesoscale Discussion	SPC	Brown, Cottonwood, Jackson, Murray, Nobles, Rock and 1 more	85 min
Aug 14, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Carlton, Carver, Chisago, Crow Wing and 13 more	5 hr
Aug 13, 11:28 PM CDT	Mesoscale Discussion	SPC	Adams, Bowman, Burleigh, Emmons, Grant, Hettinger and 3 more	2 hr
Aug 14, 12:50 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Burleigh, Dickey, Emmons, Grant, Hettinger and 8 more	8 hr
Aug 14, 2:12 AM CDT	Mesoscale Discussion	SPC	Adams, Emmons, Grant, Hettinger, Morton, Sioux	93 min
Aug 14, 5:14 AM CDT	Mesoscale Discussion	SPC	Emmons, Grant, Kidder, LaMoure, Logan, McIntosh and 2 more	91 min

Nearby

Mesoscale Discussions in Minnesota, 2020 Mesoscale Discussions in North Dakota, 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.