Alert archive / Nebraska / Mesoscale Discussions in 2015

Mesoscale Discussion 352

April 17, 2015Frontier County, Hayes County, Lincoln County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2015, 11:48 PM CDT for Frontier County, Hayes County, Lincoln County, Nebraska. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Apr 17, 2015, 11:48 PM CDT (04:48 UTC)
Expired: Apr 18, 2015, 12:45 AM CDT
In force: 57 min
Issued by: the Storm Prediction Center

Counties Frontier County, NE, Hayes County, NE, Lincoln County, NE

The radar

The North Platte radar (KLNX), 126 km from the middle of the area, began a volume at 04:51 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 00:00Z, 4.8 hours before the alert went out and 41 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: 441 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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
Apr 17, 7:06 PM CDT	Mesoscale Discussion	SPC	Arthur, Chase, Cheyenne, Deuel, Dundy, Frontier and 9 more	84 min
Apr 17, 8:24 PM CDT	Mesoscale Discussion	SPC	Furnas, Harlan	2 hr
Apr 17, 8:56 PM CDT	Mesoscale Discussion	SPC	Chase, Cheyenne, Deuel, Dundy, Frontier, Hayes and 5 more	94 min
Apr 18, 2:43 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Clay, Dawson, Franklin, Furnas and 7 more	8 hr
Apr 18, 2:49 PM CDT	Mesoscale Discussion	SPC	Arthur, Chase, Dundy, Frontier, Furnas, Harlan and 6 more	116 min
Apr 18, 3:08 PM CDT	Tornado Watch	SPC	Arthur, Chase, Cheyenne, Custer, Deuel, Dundy and 11 more	6 hr
Apr 18, 5:31 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Dawson, Franklin, Furnas and 8 more	59 min
Apr 18, 6:07 PM CDT	Mesoscale Discussion	SPC	Arthur, Chase, Cheyenne, Deuel, Dundy, Frontier and 10 more	53 min

Nearby

Mesoscale Discussions in Nebraska, 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.