Alert archive / Nebraska / Mesoscale Discussions in 2019

Mesoscale Discussion 644

May 16, 201934 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 16, 2019, 8:06 PM CDT for 34 counties in Nebraska. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: May 16, 2019, 8:06 PM CDT (01:06 UTC)
Expired: May 16, 2019, 10:00 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 34 counties

Antelope County, NE, Arthur County, NE, Blaine County, NE, Boone County, NE, Brown County, NE, Buffalo County, NE, Chase 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, Hooker County, NE, Howard County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Perkins County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 89 km from the middle of the area, began a volume at 01:10 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, 1.1 hours before the alert went out and 36 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: 1778 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 2038 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.7

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.

Issued	Product	Office	Counties	Lasted
May 16, 7:57 PM CDT	Severe Thunderstorm Watch	SPC	Burt, Cuming, Dodge, Washington	6 hr
May 16, 11:12 PM CDT	Mesoscale Discussion	SPC	Burt, Cuming, Dodge, Washington	2 hr
May 17, 1:14 PM CDT	Mesoscale Discussion	SPC	Banner, Cheyenne, Kimball, Scotts Bluff	2 hr
May 17, 1:54 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Cheyenne, Kimball, Morrill, Scotts Bluff	6 hr
May 17, 1:55 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Chase, Custer, Dawson, Dundy and 13 more	2 hr
May 17, 2:59 PM CDT	Tornado Watch	SPC	Arthur, Blaine, Buffalo, Chase, Custer, Dawson and 27 more	9 hr
May 17, 4:38 PM CDT	Severe Thunderstorm Watch	SPC	Boyd, Brown, Cherry, Keya Paha, Sheridan	7 hr
May 17, 5:07 PM CDT	Mesoscale Discussion	SPC	Banner, Cheyenne, Kimball, Morrill, Scotts Bluff	113 min
May 17, 5:45 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Buffalo, Chase, Custer, Dawson and 27 more	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2019 Every mesoscale discussion in 2019

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.