Alert archive / Minnesota / Mesoscale Discussions in 2007

Mesoscale Discussion 1489

July 15, 200722 counties in Minnesota; 20 counties in North Dakota; 11 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2007, 7:42 PM CDT for 22 counties in Minnesota; 20 counties in North Dakota; 11 counties in South Dakota. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jul 15, 2007, 7:42 PM CDT (00:42 UTC)
Expired: Jul 15, 2007, 9:15 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center

All 53 counties

Becker County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Pope County, MN, Renville County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wilkin County, MN, Yellow Medicine County, MN, Barnes County, ND, Benson 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, Nelson County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Wells County, ND, Brookings County, SD, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Marshall County, SD, Moody County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 109 km from the middle of the area, began a volume at 00:44 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 00:00Z, 0.7 hours before the alert went out and 199 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2083 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 160 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
Jul 15, 10:20 PM CDT	Mesoscale Discussion	SPC	Big Stone, Chippewa, Douglas, Grant, Kandiyohi, Lac qui Parle and 9 more	55 min
Jul 16, 1:36 PM CDT	Mesoscale Discussion	SPC	Big Stone, Blue Earth, Brown, Chippewa, Cottonwood, Dodge and 24 more	114 min
Jul 16, 2:07 PM CDT	Tornado Watch	SPC	Blue Earth, Brown, Chippewa, Cottonwood, Dodge, Faribault and 23 more	8 hr
Jul 16, 5:24 PM CDT	Mesoscale Discussion	SPC	Faribault, Freeborn, Martin, Mower, Watonwan	2 hr

Nearby

Mesoscale Discussions in Minnesota, 2007 Mesoscale Discussions in North Dakota, 2007 Mesoscale Discussions in South Dakota, 2007 Every mesoscale discussion in 2007

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.