Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 335

April 13, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2014, 1:16 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 13, 2014, 1:16 PM CDT (18:16 UTC)
Expired
Apr 13, 2014, 7:15 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 79 counties

Buena Vista County, IA, Carroll County, IA, Cherokee County, IA, Crawford County, IA, Harrison County, IA, Ida County, IA, Monona County, IA, O'Brien County, IA, Plymouth County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Woodbury County, IA, Jewell County, KS, Norton County, KS, Phillips County, KS, Smith County, KS, Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cedar County, NE, Clay 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, Franklin County, NE, Frontier County, NE, Furnas 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, Kearney County, NE, Knox County, NE, Lancaster County, NE, Lincoln County, NE, Logan 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, Red Willow County, NE, Rock 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, Webster County, NE, Wheeler County, NE, York County, NE, Clay County, SD, Union County, SD, Yankton County, SD

The radar

The Grand Island radar (KUEX), 125 km from the middle of the area, began a volume at 18:19 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

Omaha, NE (KOAX), launched 12:00Z, 6.3 hours before the alert went out and 161 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 2014-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2014-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
872 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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
Apr 12, 9:08 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Audubon, Benton, Black Hawk and 46 more67 min
Apr 12, 9:12 PM CDTMesoscale DiscussionSPCDecatur, Page, Ringgold, Taylor63 min
Apr 12, 9:38 PM CDTSevere Thunderstorm WatchSPCAdair, Allamakee, Audubon, Benton, Black Hawk, Boone and 55 more6 hr
Apr 12, 11:26 PM CDTMesoscale DiscussionSPCAppanoose, Benton, Black Hawk, Buchanan, Cedar, Clarke and 35 more64 min
Apr 13, 1:37 AM CDTMesoscale DiscussionSPCClinton, Jackson, Muscatine, Scott83 min
Apr 13, 7:41 AM CDTMesoscale DiscussionSPCAdams, Appanoose, Clarke, Davis, Decatur, Des Moines and 15 more2 hr
Apr 13, 11:10 AM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Brown, Butler, Chase and 27 more3 hr
Apr 13, 12:02 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Atchison, Brown, Butler, Chase and 34 more7 hr
Apr 13, 2:32 PM CDTMesoscale DiscussionSPCAtchison, Coffey, Doniphan, Douglas, Elk, Franklin and 7 more88 min
Apr 13, 4:13 PM CDTMesoscale DiscussionSPCCherokee32 min
Apr 13, 4:27 PM CDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford7 hr

Nearby

Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Kansas, 2014Every mesoscale discussion in 2014

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.