Alert archive / North Dakota / Mesoscale Discussions in 2017

Mesoscale Discussion 1346

July 19, 20174 counties in Minnesota; 6 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2017, 9:59 AM CDT for 4 counties in Minnesota; 6 counties in North Dakota. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jul 19, 2017, 9:59 AM CDT (14:59 UTC)
Expired: Jul 19, 2017, 12:30 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Kittson County, MN, Marshall County, MN, Pennington County, MN, Roseau County, MN, Cavalier County, ND, Pembina County, ND, Ramsey County, ND, Rolette County, ND, Towner County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 107 km from the middle of the area, began a volume at 15:03 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 3.0 hours before the alert went out and 290 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: 205 J/kg
Mixed-layer CIN: -404 J/kg
Mixed-layer LCL: 1357 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 323 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
Jul 19, 9:55 AM CDT	Mesoscale Discussion	SPC	Lincoln, Lyon, Pipestone, Yellow Medicine	2 hr
Jul 19, 12:11 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Cottonwood, Dodge, Faribault, Fillmore and 15 more	2 hr
Jul 19, 12:36 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Cottonwood, Faribault, Freeborn, Jackson and 17 more	5 hr
Jul 19, 1:13 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Cottonwood, Jackson, Lincoln, Lyon and 5 more	92 min
Jul 19, 2:38 PM CDT	Mesoscale Discussion	SPC	Fillmore, Houston, Mower	2 hr
Jul 19, 2:46 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Cottonwood, Faribault, Freeborn, Le Sueur and 5 more	89 min
Jul 19, 3:29 PM CDT	Severe Thunderstorm Watch	SPC	Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more	6 hr
Jul 19, 6:32 PM CDT	Mesoscale Discussion	SPC	Fillmore, Houston, Mower	58 min
Jul 19, 2:36 AM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Dunn, Golden Valley, Hettinger and 3 more	114 min
Jul 19, 7:01 AM CDT	Mesoscale Discussion	SPC	Adams, Barnes, Benson, Billings, Burleigh, Cass and 38 more	119 min

Nearby

Mesoscale Discussions in North Dakota, 2017 Mesoscale Discussions in Minnesota, 2017 Every mesoscale discussion in 2017

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.