Alert archive / Nebraska / Mesoscale Discussions in 2017

Mesoscale Discussion 1023

June 13, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2017, 9:36 PM CDT for 4 states. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Jun 13, 2017, 9:36 PM CDT (02:36 UTC)
Expired
Jun 13, 2017, 10:30 PM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 56 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Clay County, KS, Cloud County, KS, Ellsworth County, KS, Jewell County, KS, Lincoln County, KS, Mitchell County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Russell County, KS, Smith County, KS, Washington County, KS, Atchison County, MO, 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, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 110 km from the middle of the area, began a volume at 02:37 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, 2.6 hours before the alert went out and 121 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 2017-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3011 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 2017-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 222 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
3011 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
1474 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
222 m²/s²
0-3 km storm-relative helicity
345 m²/s²
Significant tornado parameter
1.7
Supercell composite
21.5

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 7:01 PM CDTTornado WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more6 hr
Jun 13, 7:48 PM CDTMesoscale DiscussionSPCHarrison, Monona87 min
Jun 13, 8:34 PM CDTMesoscale DiscussionSPCCherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 3 more56 min
Jun 14, 12:06 PM CDTMesoscale DiscussionSPCBenton, Buchanan, Cedar, Clayton, Clinton, Davis and 20 more2 hr
Jun 14, 12:40 PM CDTSevere Thunderstorm WatchSPCClinton, Des Moines, Henry, Jackson, Lee, Louisa and 3 more7 hr
Jun 13, 8:55 PM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Ford, Kiowa and 4 more65 min
Jun 14, 3:37 PM CDTMesoscale DiscussionSPCAllen, Anderson, Butler, Chase, Chautauqua, Coffey and 28 more2 hr
Jun 14, 6:11 PM CDTMesoscale DiscussionSPCAnderson, Bourbon, Johnson, Linn, Miami, Wyandotte64 min
Jun 14, 12:40 PM CDTMesoscale DiscussionSPCAudrain, Benton, Boone, Callaway, Camden, Cape Girardeau and 38 more3 hr
Jun 14, 1:04 PM CDTSevere Thunderstorm WatchSPCAudrain, Bates, Benton, Boone, Callaway, Camden and 46 more9 hr

Nearby

Mesoscale Discussions in Nebraska, 2017Mesoscale Discussions in Iowa, 2017Mesoscale Discussions in Kansas, 2017Every mesoscale discussion in 2017

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.