Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 2546

December 19, 200423 counties in Minnesota; Traill County, North Dakota

The Storm Prediction Center issued this mesoscale discussion at Dec 19, 2004, 6:52 PM CST for 23 counties in Minnesota; Traill County, North Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Dec 19, 2004, 6:52 PM CST (00:52 UTC)
Expired: Dec 20, 2004, 12:45 AM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 24 counties

Becker County, MN, Beltrami County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Kittson County, MN, Koochiching County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 184 km from the middle of the area, began a volume at 00:50 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 00:00Z, 0.9 hours before the alert went out and 322 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: 1873 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 258 m²/s²
0-3 km storm-relative helicity: 711 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
Dec 20, 1:02 AM CST	Mesoscale Discussion	SPC	Carlton, Cook, Lake, Saint Louis	4 hr
Dec 20, 5:28 AM CST	Mesoscale Discussion	SPC	Anoka, Blue Earth, Brown, Carver, Cottonwood, Dakota and 28 more	5 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.