Alert archive / Nebraska / Mesoscale Discussions in 2016

Mesoscale Discussion 727

May 25, 2016Phillips County, Sedgwick County, Colorado; 22 counties in Nebraska; 18 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 25, 2016, 1:52 PM MDT for Phillips County, Sedgwick County, Colorado; 22 counties in Nebraska; 18 counties in South Dakota. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
May 25, 2016, 1:52 PM MDT (19:52 UTC)
Expired
May 25, 2016, 2:45 PM MDT
In force
53 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 42 counties

Phillips County, CO, Sedgwick County, CO, Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Deuel County, NE, Garfield County, NE, Hayes County, NE, Holt County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Rock County, NE, Thomas County, NE, Valley County, NE, Aurora County, SD, Beadle County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Sanborn County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 46 km from the middle of the area, began a volume at 19:53 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.9 hours before the alert went out and 138 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 2016-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2016-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -84 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1160 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-84 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
May 24, 6:09 PM MDTTornado WatchSPCKit Carson, Yuma6 hr
May 24, 6:34 PM MDTMesoscale DiscussionSPCLogan, Morgan, Phillips, Sedgwick, Washington86 min
May 24, 8:02 PM MDTMesoscale DiscussionSPCCherry, Sheridan58 min
May 24, 8:49 PM MDTMesoscale DiscussionSPCGage, Jefferson, Nuckolls, Pawnee, Richardson, Thayer86 min
May 24, 9:09 PM MDTSevere Thunderstorm WatchSPCGage, Johnson, Nemaha, Pawnee, Richardson6 hr
May 24, 9:43 PM MDTMesoscale DiscussionSPCAdams, Buffalo, Custer, Dawson, Franklin, Frontier and 15 more92 min
May 24, 10:07 PM MDTSevere Thunderstorm WatchSPCAdams, Blaine, Buffalo, Custer, Dawson, Franklin and 17 more6 hr
May 24, 10:56 PM MDTMesoscale DiscussionSPCChase, Dundy, Hayes, Hitchcock, Lincoln64 min
May 25, 2:33 AM MDTMesoscale DiscussionSPCAdams, Buffalo, Chase, Dawson, Franklin, Frontier and 8 more57 min
May 25, 5:10 PM MDTMesoscale DiscussionSPCAurora, Beadle, Brown, Brule, Buffalo, Campbell and 16 more65 min

Nearby

Mesoscale Discussions in Nebraska, 2016Mesoscale Discussions in South Dakota, 2016Mesoscale Discussions in Colorado, 2016Every mesoscale discussion in 2016

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.