Alert archive / South Dakota / Mesoscale Discussions in 2006

Mesoscale Discussion 1006

May 27, 20064 states

The Storm Prediction Center issued this mesoscale discussion at May 27, 2006, 5:53 PM MDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 27, 2006, 5:53 PM MDT (23:53 UTC)
Expired: May 27, 2006, 8:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Carter County, MT, Adams County, ND, Bowman County, ND, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD, Crook County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 56 km from the middle of the area, began a volume at 23:55 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 12:00Z, 11.9 hours before the alert went out and 329 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: 521 J/kg
Mixed-layer CIN: -598 J/kg
Mixed-layer LCL: 1311 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 26, 6:49 PM MDT	Mesoscale Discussion	SPC	Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 18 more	86 min
May 26, 9:35 PM MDT	Mesoscale Discussion	SPC	Benson, Bottineau, Burleigh, Dunn, Eddy, Emmons and 20 more	115 min
May 26, 10:25 PM MDT	Severe Thunderstorm Watch	SPC	Benson, Billings, Bottineau, Burke, Burleigh, Cavalier and 24 more	6 hr
May 27, 1:52 AM MDT	Mesoscale Discussion	SPC	Benson, Billings, Bottineau, Burleigh, Cavalier, Dunn and 21 more	113 min
May 27, 3:26 PM MDT	Mesoscale Discussion	SPC	Barnes, Benson, Burleigh, Dickey, Eddy, Emmons and 17 more	2 hr
May 27, 3:46 PM MDT	Tornado Watch	SPC	Benson, Bottineau, Burleigh, Cavalier, Dickey, Eddy and 26 more	7 hr

Nearby

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