Alert archive / Minnesota / Mesoscale Discussions in 2017

Mesoscale Discussion 1240

July 5, 201710 counties in Minnesota; 9 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2017, 9:51 PM CDT for 10 counties in Minnesota; 9 counties in North Dakota. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jul 5, 2017, 9:51 PM CDT (02:51 UTC)
Expired: Jul 5, 2017, 11:45 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Beltrami County, MN, Clearwater County, MN, Kittson County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Cavalier County, ND, Grand Forks County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Rolette County, ND, Towner County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 90 km from the middle of the area, began a volume at 02:54 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 398Jul 5, 10:10 PM CDT

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.9 hours before the alert went out and 272 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: 23 J/kg
Mixed-layer CIN: -183 J/kg
Mixed-layer LCL: 2209 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 79 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 5, 10:12 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Clay, Clearwater, Grant, Hubbard, Kittson and 10 more	6 hr
Jul 6, 12:51 AM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Beltrami, Benton, Carlton, Cass and 28 more	114 min
Jul 6, 3:26 AM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Benton, Carlton, Cass, Chisago and 13 more	8 hr
Jul 6, 5:43 AM CDT	Mesoscale Discussion	SPC	Carlton, Pine	2 hr
Jul 6, 2:00 PM CDT	Mesoscale Discussion	SPC	Cook, Lake	60 min

Nearby

Mesoscale Discussions in Minnesota, 2017 Mesoscale Discussions in North Dakota, 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.