Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1528

August 8, 201422 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2014, 9:26 PM CDT for 22 counties in Nebraska. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Aug 8, 2014, 9:26 PM CDT (02:26 UTC)
Expired: Aug 8, 2014, 11:00 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 22 counties

Antelope County, NE, Boone County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Frontier County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Kearney County, NE, Lincoln County, NE, Logan County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 109 km from the middle of the area, began a volume at 02:26 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, 2.4 hours before the alert went out and 51 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: 613 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 2291 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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
Aug 8, 7:48 PM CDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Buffalo, Chase, Custer, Dawson and 22 more	5 hr
Aug 8, 11:48 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 17 more	87 min
Aug 9, 2:46 PM CDT	Mesoscale Discussion	SPC	Adams, Blaine, Buffalo, Chase, Custer, Dawson and 24 more	119 min
Aug 9, 3:03 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Arthur, Blaine, Brown, Buffalo, Chase and 42 more	9 hr
Aug 9, 5:08 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Garden, Morrill and 3 more	67 min
Aug 9, 6:40 PM CDT	Mesoscale Discussion	SPC	Adams, Arthur, Blaine, Brown, Buffalo, Chase and 33 more	95 min

Nearby

Mesoscale Discussions in Nebraska, 2014 Every 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.