Alert archive / Minnesota / Mesoscale Discussions in 2006

Mesoscale Discussion 954

May 23, 200618 counties in Minnesota; 4 counties in North Dakota; Roberts County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 23, 2006, 5:01 PM CDT for 18 counties in Minnesota; 4 counties in North Dakota; Roberts County, South Dakota. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: May 23, 2006, 5:01 PM CDT (22:01 UTC)
Expired: May 23, 2006, 7:00 PM CDT
In force: 119 min
Issued by: the Storm Prediction Center

All 23 counties

Becker County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Polk County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Yellow Medicine County, MN, Cass County, ND, Ransom County, ND, Richland County, ND, Traill County, ND, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 158 km from the middle of the area, began a volume at 22:02 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 383May 23, 6:40 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.0 hours before the alert went out and 227 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: 303 J/kg
Mixed-layer CIN: -431 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 23, 5:40 PM CDT	Mesoscale Discussion	SPC	Pipestone, Rock	2 hr
May 23, 6:40 PM CDT	Severe Thunderstorm Watch	SPC	Becker, Chippewa, Clay, Clearwater, Cottonwood, Douglas and 25 more	6 hr
May 23, 5:51 AM CDT	Mesoscale Discussion	SPC	Cavalier, Ramsey, Towner	84 min
May 23, 2:25 PM CDT	Mesoscale Discussion	SPC	Barnes, Benson, Billings, Bottineau, Burke, Burleigh and 39 more	2 hr
May 23, 3:58 PM CDT	Severe Thunderstorm Watch	SPC	Billings, Burke, Divide, Dunn, Golden Valley, McKenzie and 3 more	6 hr
May 23, 6:25 PM CDT	Mesoscale Discussion	SPC	Billings, Burke, Divide, Dunn, Golden Valley, McKenzie and 3 more	2 hr
May 23, 12:12 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 22 more	93 min
May 23, 2:10 PM CDT	Tornado Watch	SPC	Aurora, Beadle, Bon Homme, Brookings, Brown, Brule and 43 more	7 hr

Nearby

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