Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 1399

June 20, 200510 counties in Minnesota; 8 counties in North Dakota; Marshall County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2005, 7:39 AM CDT for 10 counties in Minnesota; 8 counties in North Dakota; Marshall County, South Dakota. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jun 20, 2005, 7:39 AM CDT (12:39 UTC)
Expired: Jun 20, 2005, 9:15 AM CDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Becker County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail 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

The radar

The Fargo/Grand Forks radar (KMVX), 88 km from the middle of the area, began a volume at 12:41 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 504Jun 20, 10:50 AM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 0.7 hours before the alert went out and 216 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: 3072 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 921 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

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
Jun 19, 7:02 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Koochiching, Lake of the Woods and 7 more	118 min
Jun 19, 8:50 PM CDT	Severe Thunderstorm Watch	SPC	Koochiching, Saint Louis	5 hr
Jun 20, 5:20 AM CDT	Severe Thunderstorm Watch	SPC	Becker, Clay, Douglas, Grant, Otter Tail, Traverse and 1 more	5 hr
Jun 20, 9:19 AM CDT	Mesoscale Discussion	SPC	Becker, Clay, Douglas, Grant, Mahnomen, Norman and 4 more	56 min
Jun 20, 10:42 AM CDT	Mesoscale Discussion	SPC	Becker, Clay, Douglas, Grant, Mahnomen, Norman and 4 more	63 min
Jun 20, 10:50 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Carver, Chippewa, Dakota, Douglas and 17 more	5 hr
Jun 20, 12:59 PM CDT	Mesoscale Discussion	SPC	Anoka, Blue Earth, Brown, Carver, Chippewa, Chisago and 30 more	91 min
Jun 20, 1:25 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Cottonwood, Faribault, Freeborn, Jackson and 17 more	7 hr
Jun 20, 2:17 AM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 4 more	58 min
Jun 20, 3:00 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 5 more	5 hr
Jun 20, 4:40 AM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Dickey, Emmons, Golden Valley and 11 more	95 min
Jun 20, 6:28 AM CDT	Mesoscale Discussion	SPC	Adams, Grant, Hettinger, Mercer, Morton, Oliver and 2 more	92 min
Jun 19, 7:55 PM CDT	Severe Thunderstorm Watch	SPC	Butte, Harding, Lawrence	7 hr
Jun 19, 11:43 PM CDT	Mesoscale Discussion	SPC	Lawrence	2 hr
Jun 20, 2:13 PM CDT	Mesoscale Discussion	SPC	Aurora, Bennett, Brule, Buffalo, Charles Mix, Douglas and 3 more	2 hr
Jun 20, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Lincoln, Union	6 hr
Jun 20, 4:09 PM CDT	Mesoscale Discussion	SPC	Lawrence, Pennington	2 hr

Nearby

Mesoscale Discussions in Minnesota, 2005 Mesoscale Discussions in North Dakota, 2005 Mesoscale Discussions in South Dakota, 2005 Every mesoscale discussion in 2005

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.