Alert archive / North Dakota / Mesoscale Discussions in 2013

Mesoscale Discussion 1963

October 11, 20137 counties in Minnesota; 18 counties in North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Oct 11, 2013, 2:49 PM CDT for 7 counties in Minnesota; 18 counties in North Dakota; 4 counties in South Dakota. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Oct 11, 2013, 2:49 PM CDT (19:49 UTC)
Expired: Oct 11, 2013, 4:15 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

All 29 counties

Big Stone County, MN, Clay County, MN, Grant County, MN, Norman County, MN, Polk County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, Nelson County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Wells County, ND, Day County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 97 km from the middle of the area, began a volume at 19:49 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

Aberdeen, SD (KABR), launched 12:00Z, 7.8 hours before the alert went out and 210 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: 106 J/kg
Mixed-layer CIN: -372 J/kg
Mixed-layer LCL: 1205 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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
Oct 11, 12:16 PM CDT	Tornado Watch	SPC	Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 10 more	8 hr
Oct 11, 5:48 PM CDT	Mesoscale Discussion	SPC	Chippewa, Clay, Douglas, Grant, Norman, Otter Tail and 4 more	87 min
Oct 11, 11:24 AM CDT	Mesoscale Discussion	SPC	Dickey, Emmons, Kidder, LaMoure, Logan, McIntosh and 3 more	96 min

Nearby

Mesoscale Discussions in North Dakota, 2013 Mesoscale Discussions in Minnesota, 2013 Mesoscale Discussions in South Dakota, 2013 Every mesoscale discussion in 2013

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.