Alert archive / South Dakota / Mesoscale Discussions in 2008

Mesoscale Discussion 1077

May 28, 20084 states

The Storm Prediction Center issued this mesoscale discussion at May 28, 2008, 11:41 PM CDT for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
May 28, 2008, 11:41 PM CDT (04:41 UTC)
Expired
May 29, 2008, 1:15 AM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 57 counties

Lyon County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Antelope County, NE, Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Cedar County, NE, Cherry County, NE, Dixon County, NE, Garfield County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Knox County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Pierce County, NE, Rock County, NE, Thomas County, NE, Wheeler County, NE, Aurora County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 171 km from the middle of the area, began a volume at 04:40 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.7 hours before the alert went out and 261 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2008-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2008-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 293 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
3 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
293 m²/s²
0-3 km storm-relative helicity
354 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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.

IssuedProductOfficeCountiesLasted
May 29, 5:32 AM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 12 more118 min
May 29, 5:26 PM CDTTornado WatchSPCPlymouth, Sioux, Woodbury6 hr
May 29, 5:43 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Bremer, Buchanan, Cedar, Chickasaw and 10 more2 hr
May 29, 5:55 PM CDTMesoscale DiscussionSPCFremont, Harrison, Mills, Monona, Montgomery, Page and 2 more35 min
May 29, 6:43 PM CDTTornado WatchSPCFremont, Harrison, Mills, Monona, Montgomery, Page and 2 more7 hr
May 29, 12:24 PM CDTMesoscale DiscussionSPCBanner, Cheyenne, Kimball, Scotts Bluff96 min
May 29, 1:33 PM CDTTornado WatchSPCArthur, Banner, Box Butte, Chase, Cherry, Cheyenne and 14 more7 hr
May 29, 1:44 PM CDTMesoscale DiscussionSPCBlaine, Custer, Dawson, Frontier, Furnas, Gosper and 9 more61 min
May 29, 2:30 PM CDTTornado Watch PDSSPCAdams, Antelope, Blaine, Boone, Boyd, Brown and 44 more8 hr
May 29, 3:55 PM CDTMesoscale DiscussionSPCAntelope, Blaine, Boyd, Brown, Cherry, Garfield and 10 more95 min
May 29, 5:07 PM CDTMesoscale DiscussionSPCDakota, Dixon23 min

Nearby

Mesoscale Discussions in South Dakota, 2008Mesoscale Discussions in Nebraska, 2008Mesoscale Discussions in Minnesota, 2008Every 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.