Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1078

June 18, 2014Phillips County, Sedgwick County, Colorado; 21 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2014, 9:28 PM MDT for Phillips County, Sedgwick County, Colorado; 21 counties in Nebraska. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Jun 18, 2014, 9:28 PM MDT (03:28 UTC)
Expired
Jun 18, 2014, 10:30 PM MDT
In force
62 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 23 counties

Phillips County, CO, Sedgwick County, CO, Blaine County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Frontier County, NE, Garfield County, NE, Greeley County, NE, Hayes County, NE, Howard County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Nance County, NE, Perkins County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 97 km from the middle of the area, began a volume at 03:29 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 00:00Z, 3.5 hours before the alert went out and 21 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 00:00Z on 2014-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1400 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 00:00Z on 2014-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
1400 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
2004 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
169 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

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 18, 6:08 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Logan, Morgan, Phillips, Sedgwick and 3 more97 min
Jun 18, 8:14 PM MDTMesoscale DiscussionSPCAdams, Clay, Fillmore, Franklin, Hall, Hamilton and 6 more61 min
Jun 18, 10:00 PM MDTSevere Thunderstorm WatchSPCAdams, Antelope, Arthur, Blaine, Boone, Boyd and 45 more6 hr
Jun 19, 12:15 AM MDTMesoscale DiscussionSPCAntelope, Boone, Buffalo, Butler, Cedar, Colfax and 27 more90 min
Jun 19, 12:31 AM MDTSevere Thunderstorm WatchSPCDakota, Dixon3 hr
Jun 19, 2:15 AM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Burt, Butler and 25 more90 min
Jun 19, 12:10 PM MDTMesoscale DiscussionSPCCass, Otoe95 min

Nearby

Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in Colorado, 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.