Alert archive / Nebraska / Mesoscale Discussions in 2020

Mesoscale Discussion 697

May 23, 202010 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 23, 2020, 11:08 PM CDT for 10 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 23, 2020, 11:08 PM CDT (04:08 UTC)
Expired: May 24, 2020, 1:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 213

Counties Blaine County, NE, Brown County, NE, Custer County, NE, Dawson County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Rock County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 37 km from the middle of the area, began a volume at 04:06 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 215May 24, 12:00 AM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.1 hours before the alert went out and 62 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: 896 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 1229 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.0

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 23, 7:53 PM CDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Cherry, Custer, Dawson and 13 more	97 min
May 23, 8:29 PM CDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Brown, Chase, Cherry, Custer and 16 more	5 hr
May 23, 11:58 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Boyd, Burt, Butler, Cass and 30 more	6 hr
May 24, 1:20 AM CDT	Mesoscale Discussion	SPC	Boone, Greeley, Nance, Valley, Wheeler	55 min
May 24, 4:13 AM CDT	Mesoscale Discussion	SPC	Cass, Otoe	62 min
May 24, 5:30 AM CDT	Severe Thunderstorm Watch	SPC	Cass, Otoe	4 hr
May 24, 1:13 PM CDT	Mesoscale Discussion	SPC	Cass, Gage, Johnson, Nemaha, Otoe, Pawnee and 1 more	92 min
May 24, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	Butler, Cass, Dodge, Douglas, Gage, Jefferson and 11 more	6 hr
May 24, 3:25 PM CDT	Mesoscale Discussion	SPC	Cass, Douglas, Johnson, Nemaha, Otoe, Richardson and 2 more	95 min
May 24, 5:14 PM CDT	Mesoscale Discussion	SPC	Adams, Clay, Fillmore, Franklin, Harlan, Nuckolls and 2 more	91 min
May 24, 5:36 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Fillmore, Nuckolls, Thayer, Webster	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2020 Every mesoscale discussion in 2020

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.