Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 1628

July 12, 200415 counties in Minnesota; Cass County, Richland County, Traill County, North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2004, 4:53 AM CDT for 15 counties in Minnesota; Cass County, Richland County, Traill County, North Dakota. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jul 12, 2004, 4:53 AM CDT (09:53 UTC)
Expired: Jul 12, 2004, 6:00 AM CDT
In force: 67 min
Issued by: the Storm Prediction Center

Counties Becker County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Mahnomen County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Cass County, ND, Richland County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 141 km from the middle of the area, began a volume at 09:53 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, 9.9 hours before the alert went out and 268 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: 2835 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1224 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 43 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 12, 1:29 AM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Kittson, Mahnomen and 7 more	91 min
Jul 12, 1:55 AM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Cass, Clay, Clearwater, Crow Wing and 19 more	5 hr
Jul 12, 3:13 AM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Cass, Clay, Clearwater, Crow Wing and 19 more	92 min
Jul 12, 8:53 AM CDT	Mesoscale Discussion	SPC	Big Stone, Grant, Lac qui Parle, Lincoln, Pipestone, Rock and 2 more	2 hr
Jul 12, 10:55 AM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Chippewa, Kandiyohi, Lac qui Parle, Lincoln, Lyon and 5 more	5 hr
Jul 12, 6:20 PM CDT	Tornado Watch	SPC	Jackson, Nobles, Rock	7 hr
Jul 11, 7:20 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bottineau, Bowman, Burke, Divide and 16 more	8 hr
Jul 11, 9:19 PM CDT	Mesoscale Discussion	SPC	Adams, Billings, Burke, Divide, Dunn, Golden Valley and 12 more	116 min
Jul 11, 9:40 PM CDT	Severe Thunderstorm Watch	SPC	Golden Valley	5 hr
Jul 11, 11:34 PM CDT	Mesoscale Discussion	SPC	Adams, Benson, Billings, Bottineau, Burke, Burleigh and 30 more	116 min
Jul 11, 11:50 PM CDT	Severe Thunderstorm Watch	SPC	Barnes, Benson, Burleigh, Cavalier, Dickey, Eddy and 17 more	6 hr

Nearby

Mesoscale Discussions in Minnesota, 2004 Mesoscale Discussions in North Dakota, 2004 Every mesoscale discussion in 2004

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.