Alert archive / Nebraska / Mesoscale Discussions in 2020

Mesoscale Discussion 699

May 24, 20205 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 24, 2020, 1:20 AM CDT for 5 counties in Nebraska. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: May 24, 2020, 1:20 AM CDT (06:20 UTC)
Expired: May 24, 2020, 2:15 AM CDT
In force: 55 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 215

Counties Boone County, NE, Greeley County, NE, Nance County, NE, Valley County, NE, Wheeler County, NE

The radar

The Grand Island radar (KUEX), 156 km from the middle of the area, began a volume at 06:21 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

Omaha, NE (KOAX), launched 00:00Z, 6.3 hours before the alert went out and 166 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: 446 J/kg
Mixed-layer CIN: -238 J/kg
Mixed-layer LCL: 1484 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: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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, 11:08 PM CDT	Mesoscale Discussion	SPC	Blaine, Brown, Custer, Dawson, Lincoln, Logan and 4 more	2 hr
May 23, 11:58 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Boyd, Burt, Butler, Cass and 30 more	6 hr
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.