Alert archive / South Dakota / Mesoscale Discussions in 2008

Mesoscale Discussion 1009

May 24, 20084 states

The Storm Prediction Center issued this mesoscale discussion at May 24, 2008, 6:07 PM CDT for 4 states. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: May 24, 2008, 6:07 PM CDT (23:07 UTC)
Expired: May 24, 2008, 8:00 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 73 counties

Lyon County, IA, Sioux County, IA, Big Stone County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Pipestone County, MN, Rock County, MN, Yellow Medicine County, MN, Burleigh County, ND, Dickey County, ND, Dunn County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Ransom County, ND, Sargent County, ND, Sioux County, ND, Stark County, ND, Stutsman County, ND, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Lyman County, SD, Marshall County, SD, McCook County, SD, McPherson County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Potter County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Sully County, SD, Tripp County, SD, Turner County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 90 km from the middle of the area, began a volume at 23:09 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.1 hours before the alert went out and 83 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: 886 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 282 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 24, 6:24 PM CDT	Tornado Watch	SPC	Burleigh, Dickey, Dunn, Emmons, Foster, Grant and 14 more	5 hr
May 23, 7:07 PM CDT	Tornado Watch	SPC	Custer, Fall River	5 hr
May 24, 1:18 PM CDT	Mesoscale Discussion	SPC	Gregory, Haakon, Jackson, Jones, Lyman, Meade and 6 more	57 min
May 24, 2:17 PM CDT	Mesoscale Discussion	SPC	Aurora, Bon Homme, Charles Mix, Clay, Davison, Douglas and 4 more	118 min
May 24, 2:39 PM CDT	Tornado Watch	SPC	Aurora, Beadle, Bon Homme, Brown, Brule, Buffalo and 31 more	7 hr

Nearby

Mesoscale Discussions in South Dakota, 2008 Mesoscale Discussions in North Dakota, 2008 Mesoscale Discussions in Minnesota, 2008 Every mesoscale discussion in 2008

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.