Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 2202

September 13, 200414 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Sep 13, 2004, 6:12 PM CDT for 14 counties in Minnesota. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Sep 13, 2004, 6:12 PM CDT (23:12 UTC)
Expired: Sep 13, 2004, 7:15 PM CDT
In force: 63 min
Issued by: the Storm Prediction Center

Counties Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 86 km from the middle of the area, began a volume at 23:15 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 818Sep 13, 6:55 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.2 hours before the alert went out and 348 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: 276 J/kg
Mixed-layer CIN: -568 J/kg
Mixed-layer LCL: 1684 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 153 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
Sep 13, 3:21 PM CDT	Mesoscale Discussion	SPC	Nobles, Rock	84 min
Sep 13, 5:50 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Cottonwood, Faribault, Jackson, Le Sueur and 12 more	7 hr
Sep 13, 6:55 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 11 more	5 hr

Nearby

Mesoscale Discussions in Minnesota, 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.