Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1101

June 20, 201414 counties in Iowa; 8 counties in Missouri; 35 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2014, 11:28 PM CDT for 14 counties in Iowa; 8 counties in Missouri; 35 counties in Nebraska. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jun 20, 2014, 11:28 PM CDT (04:28 UTC)
Expired
Jun 21, 2014, 1:00 AM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 57 counties

Adair County, IA, Adams County, IA, Cass County, IA, Decatur County, IA, Fremont County, IA, Harrison County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Andrew County, MO, Atchison County, MO, Daviess County, MO, Gentry County, MO, Harrison County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Adams County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Washington County, NE, York County, NE

The radar

The Omaha radar (KOAX), 71 km from the middle of the area, began a volume at 04:27 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 00:00Z, 4.5 hours before the alert went out and 71 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 00:00Z on 2014-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2575 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, Omaha, NE at 00:00Z on 2014-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
2575 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1837 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jun 20, 8:29 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Calhoun, Carroll, Cass and 15 more91 min
Jun 20, 8:51 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Cass, Fremont, Mills, Montgomery and 4 more6 hr
Jun 21, 1:57 AM CDTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Ringgold and 2 more63 min
Jun 21, 12:41 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Henry, Jackson, Lee and 3 more2 hr
Jun 21, 1:33 PM CDTSevere Thunderstorm WatchSPCAudrain, Boone, Callaway, Knox, Lewis, Lincoln and 7 more7 hr
Jun 21, 3:41 PM CDTMesoscale DiscussionSPCLewis, Marion, Monroe, Pike, Ralls, Shelby64 min
Jun 21, 6:16 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Lincoln, Marion, Monroe and 10 more89 min
Jun 20, 7:05 PM CDTMesoscale DiscussionSPCAdams, Arthur, Blaine, Brown, Buffalo, Chase and 36 more85 min
Jun 21, 2:23 PM CDTMesoscale DiscussionSPCBox Butte, Dawes, Garden, Morrill, Scotts Bluff, Sheridan and 1 more67 min
Jun 21, 2:56 PM CDTSevere Thunderstorm WatchSPCArthur, Banner, Box Butte, Brown, Cherry, Cheyenne and 14 more7 hr
Jun 21, 3:43 PM CDTMesoscale DiscussionSPCDundy2 hr
Jun 21, 5:49 PM CDTMesoscale DiscussionSPCCherry, Grant, Hooker86 min

Nearby

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