Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1699

September 9, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Sep 9, 2014, 5:06 PM CDT for 4 states. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Sep 9, 2014, 5:06 PM CDT (22:06 UTC)
Expired
Sep 9, 2014, 6:00 PM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 71 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Fremont County, IA, Guthrie 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, Atchison County, KS, Brown County, KS, Cloud County, KS, Doniphan County, KS, Jewell County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Osborne County, KS, Phillips County, KS, Republic County, KS, Rooks 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, Buffalo County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Dawson County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Merrick County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Polk 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), 103 km from the middle of the area, began a volume at 22:09 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, 10.1 hours before the alert went out and 103 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 2014-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1246 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 2014-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
1246 J/kg
Mixed-layer CIN
-266 J/kg
Mixed-layer LCL
1436 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
96 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
Sep 9, 12:13 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Clarke, Decatur and 11 more62 min
Sep 9, 3:06 PM CDTMesoscale DiscussionSPCAdams, Decatur, Fremont, Mills, Montgomery, Page and 3 more114 min
Sep 9, 3:34 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Cass, Clarke and 17 more8 hr
Sep 9, 6:45 PM CDTMesoscale DiscussionSPCAppanoose, Decatur, Fremont, Monroe, Page, Ringgold and 2 more90 min
Sep 9, 3:36 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Rawlins, Sherman, Thomas114 min
Sep 9, 4:05 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Ellis, Gove, Graham, Logan and 7 more7 hr
Sep 9, 5:26 PM CDTMesoscale DiscussionSPCBarton, Clay, Dickinson, Edwards, Ellsworth, Finney and 23 more94 min
Sep 9, 6:17 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Ellis, Gove, Graham, Logan and 9 more88 min
Sep 9, 9:44 AM CDTMesoscale DiscussionSPCCity of Saint Louis2 hr
Sep 9, 1:25 PM CDTMesoscale DiscussionSPCBenton, Boone, Callaway, Camden, Carter, Christian and 40 more2 hr
Sep 9, 5:02 PM CDTMesoscale DiscussionSPCAudrain, Jefferson, Lincoln, Monroe, Montgomery, Pike and 5 more88 min

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.