Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 774

June 1, 20149 counties in Kansas; 39 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2014, 1:08 PM CDT for 9 counties in Kansas; 39 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 1, 2014, 1:08 PM CDT (18:08 UTC)
Expired
Jun 1, 2014, 3:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 48 counties

Graham County, KS, Jewell County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Smith County, KS, Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dawson County, NE, Dodge County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Valley County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 41 km from the middle of the area, began a volume at 18:12 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, 6.1 hours before the alert went out and 178 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 2014-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1168 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 2014-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
1168 J/kg
Mixed-layer CIN
-191 J/kg
Mixed-layer LCL
1530 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
-6 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
Jun 1, 1:39 AM CDTMesoscale DiscussionSPCGrant, Hamilton, Haskell, Kearny, Meade, Seward96 min
Jun 1, 1:28 PM CDTSevere Thunderstorm WatchSPCBrown, Clay, Cloud, Dickinson, Geary, Jackson and 17 more10 hr
Jun 1, 1:51 PM CDTMesoscale DiscussionSPCBarton, Cheyenne, Clark, Decatur, Edwards, Ellis and 29 more114 min
Jun 1, 3:07 PM CDTSevere Thunderstorm WatchSPCBarber, Barton, Cheyenne, Clark, Comanche, Decatur and 48 more7 hr
Jun 1, 3:42 PM CDTMesoscale DiscussionSPCClay, Cloud, Graham, Jewell, Lincoln, Marshall and 9 more63 min
Jun 1, 6:44 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Clay, Cloud, Comanche and 35 more91 min
Jun 1, 6:50 PM CDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Chase, Coffey, Doniphan and 20 more85 min
May 31, 8:32 PM CDTMesoscale DiscussionSPCSioux118 min
Jun 1, 2:34 PM CDTMesoscale DiscussionSPCCedar, Dakota, Dixon, Pierce, Thurston, Wayne86 min
Jun 1, 5:24 PM CDTMesoscale DiscussionSPCArthur, Banner, Box Butte, Chase, Cheyenne, Deuel and 7 more96 min
Jun 1, 6:25 PM CDTSevere Thunderstorm WatchSPCArthur, Blaine, Chase, Cherry, Custer, Deuel and 12 more4 hr

Nearby

Mesoscale Discussions in Nebraska, 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.