Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1099

June 20, 20145 counties in Colorado; 8 counties in Kansas; 42 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2014, 6:05 PM MDT for 5 counties in Colorado; 8 counties in Kansas; 42 counties in Nebraska. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Jun 20, 2014, 6:05 PM MDT (00:05 UTC)
Expired
Jun 20, 2014, 7:30 PM MDT
In force
85 min
Issued by
the Storm Prediction Center
All 55 counties

Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Adams County, NE, Arthur County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garden County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 148 km from the middle of the area, began a volume at 00:06 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, 0.1 hours before the alert went out and 55 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 2014-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2673 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 2014-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 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
2673 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1560 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
311 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.3

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 21, 2:43 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Cheyenne, Elbert, Kiowa, Kit Carson and 8 more2 hr
Jun 20, 7:29 PM MDTMesoscale DiscussionSPCBrown, Decatur, Jewell, Marshall, Nemaha, Norton and 4 more91 min
Jun 20, 7:51 PM MDTSevere Thunderstorm WatchSPCBrown, Doniphan, Jewell, Marshall, Nemaha, Phillips and 3 more6 hr
Jun 21, 12:57 AM MDTMesoscale DiscussionSPCBrown, Doniphan, Jewell, Marshall, Nemaha, Phillips and 3 more63 min
Jun 20, 10:28 PM MDTMesoscale DiscussionSPCAdams, Burt, Butler, Cass, Clay, Colfax and 29 more92 min
Jun 21, 1:23 PM MDTMesoscale DiscussionSPCBox Butte, Dawes, Garden, Morrill, Scotts Bluff, Sheridan and 1 more67 min
Jun 21, 1:56 PM MDTSevere Thunderstorm WatchSPCArthur, Banner, Box Butte, Brown, Cherry, Cheyenne and 14 more7 hr
Jun 21, 4:49 PM MDTMesoscale DiscussionSPCCherry, Grant, Hooker86 min

Nearby

Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in Kansas, 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.