Alert archive / Nebraska / Mesoscale Discussions in 2013

Mesoscale Discussion 862

May 29, 201316 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 29, 2013, 5:18 PM CDT for 16 counties in Nebraska. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: May 29, 2013, 5:18 PM CDT (22:18 UTC)
Expired: May 29, 2013, 6:45 PM CDT
In force: 87 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 77 km from the middle of the area, began a volume at 22:19 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.

Tornado Watch 247May 29, 6:25 PM CDT

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.3 hours before the alert went out and 77 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: 1537 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 544 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
May 28, 7:52 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Blaine, Box Butte, Boyd, Brown and 40 more	113 min
May 28, 9:20 PM CDT	Mesoscale Discussion	SPC	Gage, Jefferson, Johnson, Nemaha, Otoe, Pawnee and 2 more	55 min
May 29, 12:57 AM CDT	Severe Thunderstorm Watch	SPC	Blaine, Custer, Hooker, Lincoln, Logan, Loup and 2 more	3 hr
May 29, 8:54 AM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Burt, Butler and 42 more	2 hr
May 29, 12:52 PM CDT	Mesoscale Discussion	SPC	Buffalo, Chase, Custer, Dawson, Dundy, Franklin and 14 more	53 min
May 29, 1:04 PM CDT	Tornado Watch	SPC	Adams, Arthur, Blaine, Buffalo, Chase, Clay and 38 more	9 hr
May 29, 3:12 PM CDT	Mesoscale Discussion	SPC	Butler, Cass, Fillmore, Gage, Hamilton, Jefferson and 12 more	2 hr
May 29, 3:24 PM CDT	Mesoscale Discussion	SPC	Adams, Arthur, Boone, Buffalo, Chase, Clay and 27 more	66 min
May 29, 3:33 PM CDT	Tornado Watch	SPC	Butler, Cass, Colfax, Gage, Jefferson, Johnson and 9 more	7 hr
May 29, 6:24 PM CDT	Tornado Watch	SPC	Antelope, Boone, Burt, Butler, Cass, Cedar and 26 more	4 hr

Nearby

Mesoscale Discussions in Nebraska, 2013 Every mesoscale discussion in 2013

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.