Alert archive / North Dakota / Mesoscale Discussions in 2006

Mesoscale Discussion 1018

May 29, 20067 counties in Minnesota; 11 counties in North Dakota; Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 29, 2006, 3:28 AM CDT for 7 counties in Minnesota; 11 counties in North Dakota; Roberts County, South Dakota. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 29, 2006, 3:28 AM CDT (08:28 UTC)
Expired: May 29, 2006, 5:00 AM CDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Becker County, MN, Big Stone County, MN, Clay County, MN, Grant County, MN, Otter Tail County, MN, Traverse County, MN, Wilkin County, MN, Cass County, ND, Cavalier County, ND, Eddy County, ND, Foster County, ND, Griggs County, ND, Nelson County, ND, Ramsey County, ND, Richland County, ND, Steele County, ND, Towner County, ND, Walsh County, ND, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 63 km from the middle of the area, began a volume at 08:28 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 8.5 hours before the alert went out and 240 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: 760 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -65 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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
May 28, 10:52 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Wilkin	6 hr
May 29, 1:57 AM CDT	Mesoscale Discussion	SPC	Big Stone, Clay, Traverse, Wilkin	2 hr
May 29, 11:22 AM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Benton, Cass, Clearwater, Crow Wing and 18 more	113 min
May 29, 1:00 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Benton, Carlton, Cass, Crow Wing, Itasca and 9 more	7 hr
May 29, 3:02 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Blue Earth, Carlton, Carver and 23 more	118 min
May 29, 3:14 PM CDT	Severe Thunderstorm Watch	SPC	Anoka, Blue Earth, Carver, Chisago, Dakota, Dodge and 23 more	6 hr
May 29, 6:03 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Blue Earth, Carlton, Carver and 32 more	87 min
May 28, 9:22 PM CDT	Mesoscale Discussion	SPC	Dickey, McIntosh	113 min

Nearby

Mesoscale Discussions in North Dakota, 2006 Mesoscale Discussions in Minnesota, 2006 Mesoscale Discussions in South 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.