Alert archive / South Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 916

May 28, 20075 counties in North Dakota; 13 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 28, 2007, 10:47 PM CDT for 5 counties in North Dakota; 13 counties in South Dakota. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: May 28, 2007, 10:47 PM CDT (03:47 UTC)
Expired: May 29, 2007, 12:15 AM CDT
In force: 88 min
Issued by: the Storm Prediction Center

Counties Dickey County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Stutsman County, ND, Brown County, SD, Campbell County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hyde County, SD, McPherson County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Aberdeen radar (KABR), 145 km from the middle of the area, began a volume at 03:47 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, 3.8 hours before the alert went out and 148 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: 151 J/kg
Mixed-layer CIN: -422 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 105 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
May 28, 7:40 PM CDT	Mesoscale Discussion	SPC	Burleigh, Dickey, Emmons, Foster, Grant, Kidder and 6 more	2 hr
May 28, 8:02 PM CDT	Mesoscale Discussion	SPC	Barnes, Cass, Grand Forks, Griggs, Nelson, Pembina and 3 more	88 min
May 29, 1:14 AM CDT	Mesoscale Discussion	SPC	Emmons, Kidder, Logan, McIntosh, Stutsman	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2007 Mesoscale Discussions in North Dakota, 2007 Every mesoscale discussion in 2007

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.