Alert archive / Nebraska / Mesoscale Discussions in 2013

Mesoscale Discussion 855

May 29, 201310 counties in Kansas; 20 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 29, 2013, 12:52 PM CDT for 10 counties in Kansas; 20 counties in Nebraska. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
May 29, 2013, 12:52 PM CDT (17:52 UTC)
Expired
May 29, 2013, 1:45 PM CDT
In force
53 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 30 counties

Cheyenne County, KS, Decatur County, KS, Graham County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Kearney County, NE, Lincoln County, NE, Logan County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Sherman County, NE, Valley County, NE

The radar

The Goodland radar (KGLD), 145 km from the middle of the area, began a volume at 17:52 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 5.9 hours before the alert went out and 92 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, N. Platte/Lee Bi, NE at 12:00Z on 2013-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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, N. Platte/Lee Bi, NE at 12:00Z on 2013-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
10 J/kg
Mixed-layer CIN
-359 J/kg
Mixed-layer LCL
1032 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 28, 7:36 PM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 13 more114 min
May 28, 7:52 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Ellis, Gove, Graham, Greeley and 14 more113 min
May 28, 9:20 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Jefferson, Marshall and 2 more55 min
May 29, 11:33 AM CDTMesoscale DiscussionSPCBarber, Clark, Comanche2 hr
May 29, 12:22 PM CDTTornado WatchSPCBarber, Barton, Clark, Comanche, Edwards, Ellis and 38 more11 hr
May 29, 1:04 PM CDTTornado WatchSPCCheyenne, Decatur, Graham, Jewell, Mitchell, Norton and 8 more9 hr
May 29, 3:00 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ellis and 32 more60 min
May 29, 3:12 PM CDTMesoscale DiscussionSPCButler, Chase, Clay, Cloud, Coffey, Cowley and 24 more2 hr
May 29, 3:24 PM CDTMesoscale DiscussionSPCDecatur, Graham, Jewell, Mitchell, Norton, Osborne and 6 more66 min
May 29, 3:33 PM CDTTornado WatchSPCClay, Cloud, Dickinson, Geary, Marshall, Morris and 4 more7 hr
May 29, 6:20 PM CDTMesoscale DiscussionSPCButler, Chase, Chautauqua, Coffey, Cowley, Elk and 4 more85 min
May 29, 12:57 AM CDTSevere Thunderstorm WatchSPCBlaine, Custer, Hooker, Lincoln, Logan, Loup and 2 more3 hr
May 29, 8:54 AM CDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Burt, Butler and 42 more2 hr
May 29, 5:18 PM CDTMesoscale DiscussionSPCBurt, Cedar, Colfax, Cuming, Dakota, Dixon and 10 more87 min
May 29, 6:24 PM CDTTornado WatchSPCAntelope, Boone, Burt, Butler, Cass, Cedar and 26 more4 hr

Nearby

Mesoscale Discussions in Nebraska, 2013Mesoscale Discussions in Kansas, 2013Every mesoscale discussion in 2013

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.