Alert archive / Minnesota / Mesoscale Discussions in 2016

Mesoscale Discussion 1341

July 20, 201612 counties in Minnesota; 9 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2016, 11:16 PM CDT for 12 counties in Minnesota; 9 counties in North Dakota. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Jul 20, 2016, 11:16 PM CDT (04:16 UTC)
Expired: Jul 21, 2016, 12:15 AM CDT
In force: 59 min
Issued by: the Storm Prediction Center

All 21 counties

Becker County, MN, Beltrami County, MN, Clearwater County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Pembina County, ND, Steele County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 32 km from the middle of the area, began a volume at 04:19 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

International Fa, MN (KINL), launched 00:00Z, 4.3 hours before the alert went out and 293 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: 2808 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

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 20, 8:41 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more	6 hr
Jul 20, 11:36 PM CDT	Mesoscale Discussion	SPC	Aitkin, Cass, Crow Wing, Itasca, Koochiching, Saint Louis	54 min
Jul 21, 12:32 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 8 more	6 hr
Jul 21, 2:30 AM CDT	Mesoscale Discussion	SPC	Aitkin, Benton, Carlton, Chisago, Crow Wing, Douglas and 10 more	2 hr
Jul 20, 8:14 PM CDT	Mesoscale Discussion	SPC	Benson, Burleigh, Cavalier, Eddy, Grant, Kidder and 7 more	61 min

Nearby

Mesoscale Discussions in Minnesota, 2016 Mesoscale Discussions in North Dakota, 2016 Every mesoscale discussion in 2016

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.