Alert archive / Nebraska / Mesoscale Discussions in 2019

Mesoscale Discussion 841

May 27, 2019Phillips County, Colorado; 19 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 27, 2019, 7:47 PM MDT for Phillips County, Colorado; 19 counties in Nebraska. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: May 27, 2019, 7:47 PM MDT (01:47 UTC)
Expired: May 27, 2019, 9:45 PM MDT
In force: 118 min
Issued by: the Storm Prediction Center

Counties Phillips County, CO, Arthur County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Gosper County, NE, Hayes County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Sherman County, NE, Valley County, NE

The radar

The North Platte radar (KLNX), 119 km from the middle of the area, began a volume at 01:49 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, 1.8 hours before the alert went out and 28 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: 309 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1328 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.3

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 28, 2:23 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson, Lincoln	3 hr
May 27, 6:34 PM MDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Fillmore, Franklin, Hall and 10 more	56 min
May 27, 7:02 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 18 more	6 hr
May 27, 9:55 PM MDT	Severe Thunderstorm Watch	SPC	Boone, Burt, Butler, Cass, Colfax, Cuming and 18 more	7 hr
May 27, 10:42 PM MDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Butler, Cass, Clay and 37 more	63 min
May 28, 12:55 AM MDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 18 more	4 hr
May 28, 3:58 AM MDT	Mesoscale Discussion	SPC	Cass, Johnson, Nemaha, Otoe, Richardson	2 hr
May 28, 1:55 PM MDT	Mesoscale Discussion	SPC	Nemaha, Richardson	95 min
May 28, 2:13 PM MDT	Severe Thunderstorm Watch	SPC	Gage, Jefferson, Johnson, Nemaha, Otoe, Pawnee and 1 more	7 hr
May 28, 4:38 PM MDT	Tornado Watch	SPC	Franklin, Nuckolls, Thayer, Webster	3 hr

Nearby

Mesoscale Discussions in Nebraska, 2019 Mesoscale Discussions in Colorado, 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.