Alert archive / Nebraska / Mesoscale Discussions in 2015

Mesoscale Discussion 1548

July 26, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2015, 4:22 PM MDT for 4 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jul 26, 2015, 4:22 PM MDT (22:22 UTC)
Expired: Jul 26, 2015, 5:45 PM MDT
In force: 83 min
Issued by: the Storm Prediction Center

All 48 counties

Cheyenne County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Arthur County, NE, Blaine County, NE, Box Butte County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 82 km from the middle of the area, began a volume at 22:25 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, 10.4 hours before the alert went out and 101 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1176 J/kg
Mixed-layer CIN: -257 J/kg
Mixed-layer LCL: 1424 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

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.

Issued	Product	Office	Counties	Lasted
Jul 26, 12:30 PM MDT	Mesoscale Discussion	SPC	Kit Carson, Lincoln, Logan, Phillips, Sedgwick, Washington and 1 more	2 hr
Jul 26, 1:07 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Cheyenne, Elbert, Kit Carson, Lincoln and 6 more	9 hr
Jul 25, 8:32 PM MDT	Mesoscale Discussion	SPC	Atchison, Barton, Brown, Chase, Clay, Coffey and 35 more	88 min
Jul 25, 9:54 PM MDT	Mesoscale Discussion	SPC	Cedar	2 hr
Jul 25, 8:32 PM MDT	Severe Thunderstorm Watch	SPC	Aurora, Bon Homme, Brookings, Brule, Charles Mix, Davison and 12 more	3 hr
Jul 26, 1:07 PM MDT	Mesoscale Discussion	SPC	Jackson, Meade, Oglala Lakota, Pennington	83 min

Nearby

Mesoscale Discussions in Nebraska, 2015 Mesoscale Discussions in Colorado, 2015 Mesoscale Discussions in South Dakota, 2015 Every mesoscale discussion in 2015

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.