Alert archive / Nebraska / Mesoscale Discussions in 2006

Mesoscale Discussion 950

May 23, 200642 counties in Nebraska; 28 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 23, 2006, 12:12 PM CDT for 42 counties in Nebraska; 28 counties in South Dakota. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 23, 2006, 12:12 PM CDT (17:12 UTC)
Expired
May 23, 2006, 1:45 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 70 counties

Adams County, NE, Antelope County, NE, Boone County, NE, Boyd County, NE, Buffalo County, NE, Butler County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Dixon County, NE, Fillmore County, NE, Franklin County, NE, Garfield County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Saline County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Valley County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Dewey County, SD, Douglas County, SD, Faulk County, SD, Gregory County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Lyman County, SD, McCook County, SD, Miner County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Sully County, SD, Tripp County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 167 km from the middle of the area, began a volume at 17:10 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, 5.2 hours before the alert went out and 214 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, Aberdeen, SD at 12:00Z on 2006-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 303 joules per kilogram.LCLLFCEL10008507005003002001001 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, Aberdeen, SD at 12:00Z on 2006-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.193958Sfc1 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
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.

IssuedProductOfficeCountiesLasted
May 22, 9:23 PM CDTMesoscale DiscussionSPCBanner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 4 more97 min
May 22, 9:37 PM CDTMesoscale DiscussionSPCArthur, Chase, Deuel, Dundy, Garden, Hayes and 4 more53 min
May 22, 10:08 PM CDTSevere Thunderstorm WatchSPCArthur, Chase, Cherry, Deuel, Dundy, Frontier and 12 more6 hr
May 22, 11:32 PM CDTMesoscale DiscussionSPCArthur, Chase, Cherry, Deuel, Dundy, Frontier and 13 more88 min
May 23, 2:05 AM CDTMesoscale DiscussionSPCArthur, Blaine, Brown, Chase, Cherry, Cheyenne and 20 more85 min
May 23, 2:10 PM CDTTornado WatchSPCAntelope, Blaine, Boone, Boyd, Brown, Butler and 22 more7 hr
May 23, 3:00 PM CDTMesoscale DiscussionSPCAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 14 more2 hr
May 23, 3:30 PM CDTSevere Thunderstorm WatchSPCAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 16 more5 hr
May 23, 5:40 PM CDTMesoscale DiscussionSPCAntelope, Boone, Butler, Cedar, Colfax, Cuming and 17 more2 hr
May 23, 6:40 PM CDTSevere Thunderstorm WatchSPCDakota, Dixon6 hr
May 23, 5:01 PM CDTMesoscale DiscussionSPCRoberts119 min

Nearby

Mesoscale Discussions in Nebraska, 2006Mesoscale Discussions in South Dakota, 2006Every 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.