Alert archive / Nebraska / Mesoscale Discussions in 2011

Mesoscale Discussion 1514

July 5, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2011, 7:07 PM CDT for 4 states. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Jul 5, 2011, 7:07 PM CDT (00:07 UTC)
Expired
Jul 5, 2011, 9:00 PM CDT
In force
113 min
Issued by
the Storm Prediction Center
All 85 counties

Fremont County, IA, Mills County, IA, Page County, IA, Atchison County, KS, Brown County, KS, Cheyenne County, KS, Clay County, KS, Cloud County, KS, Decatur County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Johnson County, KS, Leavenworth County, KS, Lyon County, KS, Marshall County, KS, Miami County, KS, Morris County, KS, Nemaha County, KS, Norton County, KS, Osage County, KS, Phillips County, KS, Pottawatomie County, KS, Rawlins County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Smith County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Holt County, MO, Jackson County, MO, Nodaway County, MO, Platte County, MO, Adams County, NE, Arthur County, NE, Buffalo County, NE, Chase County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Keith County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Richardson County, NE, Saline County, NE, Sherman County, NE, Thayer County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 31 km from the middle of the area, began a volume at 00:09 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 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 00:00Z, 0.1 hours before the alert went out and 192 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 2011-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 954 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 00:00Z on 2011-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 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
954 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
1218 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Jul 5, 7:49 PM CDTMesoscale DiscussionSPCAdair, Appanoose, Carroll, Clarke, Dallas, Decatur and 11 more56 min
Jul 5, 8:02 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Atchison, Butler, Chase, Clay and 28 more7 hr
Jul 5, 8:23 PM CDTMesoscale DiscussionSPCCheyenne2 hr
Jul 5, 10:41 PM CDTMesoscale DiscussionSPCChase, Cheyenne, Clay, Cloud, Coffey, Decatur and 33 more2 hr
Jul 6, 3:38 PM CDTMesoscale DiscussionSPCCheyenne, Greeley, Sherman, Wallace67 min
Jul 6, 3:56 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Gove, Greeley, Logan, Rawlins and 5 more8 hr
Jul 6, 6:16 PM CDTMesoscale DiscussionSPCCheyenne, Sherman119 min
Jul 6, 1:38 PM CDTMesoscale DiscussionSPCBarry, Benton, Bollinger, Butler, Camden, Carter and 44 more97 min

Nearby

Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Missouri, 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; radar from the NEXRAD Level II archive.