Alert archive / Nebraska / Mesoscale Discussions in 2011

Mesoscale Discussion 1329

June 20, 20115 states

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2011, 6:17 PM CDT for 5 states. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Jun 20, 2011, 6:17 PM CDT (23:17 UTC)
Expired
Jun 20, 2011, 7:15 PM CDT
In force
58 min
Issued by
the Storm Prediction Center
All 100 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Plymouth County, IA, Woodbury County, IA, Brown County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Clay County, KS, Coffey County, KS, Cowley County, KS, Decatur County, KS, Dickinson County, KS, Elk County, KS, Geary County, KS, Graham County, KS, Greenwood County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, Montgomery County, KS, Morris County, KS, Nemaha County, KS, Norton County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Sedgwick County, KS, Shawnee County, KS, Sheridan County, KS, Sumner County, KS, Wabaunsee County, KS, Washington County, KS, Wilson County, KS, Woodson County, KS, Atchison County, MO, Antelope County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dakota County, NE, Dawson County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Holt County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Wheeler County, NE, York County, NE, Clay County, SD, Union County, SD

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.3 hours before the alert went out and 210 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, Omaha, NE at 12:00Z on 2011-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 104 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, Omaha, NE at 12:00Z on 2011-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -142 square meters per square second.19395878Sfc1 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
104 J/kg
Mixed-layer CIN
-396 J/kg
Mixed-layer LCL
1450 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
-142 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.5

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
Jun 19, 9:16 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 31 more59 min
Jun 19, 9:49 PM CDTTornado WatchSPCFremont, Harrison, Mills, Monona, Montgomery, Page and 2 more6 hr
Jun 19, 11:42 PM CDTSevere Thunderstorm WatchSPCBenton, Cedar, Clinton, Des Moines, Henry, Iowa and 10 more6 hr
Jun 20, 1:40 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 24 more35 min
Jun 20, 3:27 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 28 more33 min
Jun 20, 3:46 AM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Black Hawk, Boone, Calhoun, Carroll and 26 more5 hr
Jun 20, 4:08 AM CDTMesoscale DiscussionSPCBenton, Cedar, Clinton, Davis, Des Moines, Henry and 12 more67 min
Jun 20, 7:29 AM CDTMesoscale DiscussionSPCBlack Hawk, Grundy, Hamilton, Hardin, Jasper, Mahaska and 6 more61 min
Jun 20, 3:08 PM CDTTornado WatchSPCAudubon, Carroll, Cass, Crawford, Fremont, Harrison and 6 more7 hr
Jun 20, 5:55 PM CDTMesoscale DiscussionSPCAdair, Audubon, Boone, Calhoun, Carroll, Dallas and 15 more65 min
Jun 20, 6:53 PM CDTTornado WatchSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 41 more6 hr
Jun 20, 8:05 AM CDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Gove, Graham, Grant and 15 more55 min
Jun 20, 8:38 AM CDTSevere Thunderstorm WatchSPCDecatur, Ellis, Finney, Gove, Graham, Grant and 25 more6 hr
Jun 20, 10:42 AM CDTMesoscale DiscussionSPCAllen, Anderson, Butler, Chase, Chautauqua, Coffey and 18 more63 min
Jun 20, 12:22 PM CDTMesoscale DiscussionSPCDecatur, Gove, Graham, Logan, Norton, Phillips and 6 more83 min
Jun 20, 1:00 PM CDTTornado Watch PDSSPCDecatur, Gove, Graham, Jewell, Mitchell, Norton and 5 more10 hr
Jun 20, 1:34 PM CDTMesoscale DiscussionSPCButler, Chase, Clay, Cowley, Dickinson, Ellsworth and 15 more116 min
Jun 20, 2:19 PM CDTMesoscale DiscussionSPCNorton, Phillips, Smith86 min
Jun 20, 2:52 PM CDTMesoscale DiscussionSPCDecatur, Rawlins, Thomas53 min
Jun 20, 3:59 PM CDTMesoscale DiscussionSPCJewell61 min
Jun 19, 8:24 PM CDTMesoscale DiscussionSPCAdams, Blaine, Boone, Buffalo, Chase, Clay and 35 more96 min
Jun 20, 12:45 AM CDTSevere Thunderstorm WatchSPCChase, Dundy, Frontier, Hayes, Hitchcock, Red Willow2 hr
Jun 20, 4:33 PM CDTMesoscale DiscussionSPCBrule, Buffalo, Gregory, Hand, Hughes, Hyde and 4 more87 min

Nearby

Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Iowa, 2011Every mesoscale discussion in 2011

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.