Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 562

May 11, 20144 states

The Storm Prediction Center issued this mesoscale discussion at May 11, 2014, 12:49 PM CDT for 4 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
May 11, 2014, 12:49 PM CDT (17:49 UTC)
Expired
May 11, 2014, 2:45 PM CDT
In force
116 min
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 57 counties

Adams County, IA, Cass County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Taylor County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Doniphan County, KS, Geary County, KS, Jackson County, KS, Jewell County, KS, Lincoln County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Osborne County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Smith County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Adams County, NE, Cass County, NE, Clay County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, Webster County, NE, York County, NE

The radar

The Omaha radar (KOAX), 127 km from the middle of the area, began a volume at 17:50 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

Topeka, KS (KFOE), launched 12:00Z, 5.8 hours before the alert went out and 153 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, Topeka, KS at 12:00Z on 2014-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1518 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, Topeka, KS at 12:00Z on 2014-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 379 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
1518 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
770 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
379 m²/s²
0-3 km storm-relative helicity
477 m²/s²
Significant tornado parameter
4.0
Supercell composite
17.0

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.

IssuedProductOfficeCountiesLasted
May 11, 1:19 AM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Harrison, Mills, Montgomery and 3 more2 hr
May 11, 2:58 AM CDTSevere Thunderstorm WatchSPCFremont, Mills, Montgomery, Page, Pottawattamie7 hr
May 11, 7:02 AM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page, Pottawattamie118 min
May 11, 9:16 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Benton, Black Hawk and 64 more89 min
May 11, 10:47 AM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Des Moines, Henry and 19 more118 min
May 11, 11:53 AM CDTTornado WatchSPCAppanoose, Benton, Cedar, Clarke, Clinton, Davis and 26 more7 hr
May 11, 12:51 PM CDTMesoscale DiscussionSPCAppanoose, Cedar, Clinton, Davis, Des Moines, Dubuque and 14 more54 min
May 11, 2:21 PM CDTTornado WatchSPCAdair, Adams, Audubon, Cass, Fremont, Harrison and 8 more8 hr
May 11, 2:36 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Iowa, Jefferson, Johnson, Keokuk and 5 more84 min
May 11, 5:09 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Jefferson, Lee, Louisa, Van Buren and 1 more66 min
May 11, 6:23 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Fremont, Mills, Montgomery and 5 more67 min
May 10, 7:59 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Barber, Barton, Bourbon and 60 more91 min
May 10, 9:50 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Barton, Butler, Chase, Clay and 29 more6 hr
May 10, 11:54 PM CDTMesoscale DiscussionSPCAllen, Anderson, Barton, Butler, Chase, Clay and 29 more96 min
May 11, 1:46 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ellis and 15 more119 min
May 11, 2:38 PM CDTTornado WatchSPCBarber, Barton, Clark, Comanche, Edwards, Ellis and 16 more7 hr
May 11, 5:31 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 25 more89 min
May 10, 7:55 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Carroll, Chariton, Cole and 22 more95 min
May 10, 10:22 PM CDTMesoscale DiscussionSPCAudrain, Callaway, Franklin, Gasconade, Jefferson, Lincoln and 12 more83 min
May 11, 4:46 PM CDTMesoscale DiscussionSPCButler, Cass, Douglas, Lancaster, Sarpy, Saunders and 2 more89 min

Nearby

Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in Kansas, 2014Mesoscale Discussions in Iowa, 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.