Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 1627

July 15, 201114 counties in Minnesota; 8 counties in North Dakota; Marshall County, Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2011, 6:10 PM CDT for 14 counties in Minnesota; 8 counties in North Dakota; Marshall County, Roberts County, South Dakota. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Jul 15, 2011, 6:10 PM CDT (23:10 UTC)
Expired: Jul 15, 2011, 7:15 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center

All 24 counties

Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Grant County, MN, Hubbard County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Polk County, MN, Red Lake County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, LaMoure County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Traill County, ND, Marshall County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 107 km from the middle of the area, began a volume at 23:11 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

Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 307 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: 1183 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 2:56 AM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 8 more	7 hr
Jul 15, 6:30 AM CDT	Mesoscale Discussion	SPC	Benton, Carver, Clay, Douglas, Grant, Hennepin and 14 more	2 hr
Jul 15, 6:40 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Carver, Chisago, Douglas, Hennepin and 14 more	6 hr
Jul 15, 11:20 AM CDT	Mesoscale Discussion	SPC	Anoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 30 more	85 min
Jul 15, 2:21 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 6 more	114 min
Jul 14, 9:46 PM CDT	Mesoscale Discussion	SPC	Adams, Emmons, Grant, Kidder, Logan, McIntosh and 1 more	59 min
Jul 14, 11:01 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Burke, Divide, Dunn and 14 more	6 hr
Jul 14, 11:55 PM CDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Emmons, Kidder, LaMoure and 6 more	65 min
Jul 15, 2:54 AM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bottineau, Bowman, Burke, Divide and 12 more	2 hr

Nearby

Mesoscale Discussions in Minnesota, 2011 Mesoscale Discussions in North Dakota, 2011 Mesoscale Discussions in South Dakota, 2011 Every mesoscale discussion in 2011

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.