Alert archive / Minnesota / Mesoscale Discussions in 2006

Mesoscale Discussion 1664

July 29, 20066 counties in Minnesota; Richland County, Sargent County, North Dakota; Grant County, Marshall County, Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 29, 2006, 1:51 PM CDT for 6 counties in Minnesota; Richland County, Sargent County, North Dakota; Grant County, Marshall County, Roberts County, South Dakota. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Jul 29, 2006, 1:51 PM CDT (18:51 UTC)
Expired: Jul 29, 2006, 3:15 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Big Stone County, MN, Grant County, MN, Otter Tail County, MN, Stevens County, MN, Traverse County, MN, Wilkin County, MN, Richland County, ND, Sargent County, ND, Grant County, SD, Marshall County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 124 km from the middle of the area, began a volume at 18:52 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.

Tornado Watch 657Jul 29, 3:40 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 6.9 hours before the alert went out and 298 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: 816 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 265 m²/s²
0-3 km storm-relative helicity: 276 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 28, 7:35 PM CDT	Mesoscale Discussion	SPC	Carlton, Kanabec, Pine	85 min
Jul 28, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Clay, Grant, Mahnomen, Norman, Otter Tail and 1 more	7 hr
Jul 28, 9:07 PM CDT	Mesoscale Discussion	SPC	Anoka, Chisago, Isanti, Kanabec, Mille Lacs, Pine and 2 more	53 min
Jul 28, 11:48 PM CDT	Mesoscale Discussion	SPC	Aitkin, Cass, Clearwater, Crow Wing, Douglas, Hubbard and 4 more	87 min
Jul 29, 1:05 AM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 6 more	55 min
Jul 29, 3:18 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Benton, Chisago, Isanti, Kanabec, Mille Lacs and 5 more	5 hr
Jul 29, 4:41 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Chisago, Isanti, Kanabec, Mille Lacs and 5 more	64 min
Jul 29, 3:40 PM CDT	Tornado Watch	SPC	Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 10 more	6 hr

Nearby

Mesoscale Discussions in Minnesota, 2006 Mesoscale Discussions in South Dakota, 2006 Mesoscale Discussions in North Dakota, 2006 Every mesoscale discussion in 2006

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.