Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 979

May 22, 200822 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 22, 2008, 10:34 PM CDT for 22 counties in Nebraska. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 22, 2008, 10:34 PM CDT (03:34 UTC)
Expired: May 22, 2008, 11:30 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center

All 22 counties

Boone County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Greeley County, NE, Howard County, NE, Johnson County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Otoe County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Washington County, NE

The radar

The Omaha radar (KOAX), 95 km from the middle of the area, began a volume at 03:36 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, 3.6 hours before the alert went out and 266 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: 169 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 489 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 418 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.7

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 22, 8:16 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Chase, Clay, Dawson, Deuel and 25 more	29 min
May 22, 9:11 PM CDT	Tornado Watch	SPC	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 11 more	8 hr
May 22, 9:24 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Blaine, Box Butte, Brown, Cherry and 15 more	66 min
May 22, 11:43 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 14 more	62 min
May 23, 2:01 AM CDT	Mesoscale Discussion	SPC	Jefferson, Nuckolls, Saline, Thayer	89 min
May 23, 9:53 AM CDT	Mesoscale Discussion	SPC	Adams, Arthur, Banner, Blaine, Box Butte, Buffalo and 31 more	67 min
May 23, 1:13 PM CDT	Mesoscale Discussion	SPC	Kimball	92 min
May 23, 1:41 PM CDT	Tornado Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more	6 hr
May 23, 2:15 PM CDT	Tornado Watch PDS	SPC	Chase, Dundy, Frontier, Furnas, Gosper, Harlan and 4 more	7 hr
May 23, 5:26 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Butler, Clay, Colfax and 23 more	64 min
May 23, 6:02 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Kimball and 3 more	58 min
May 23, 6:18 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Furnas, Gosper, Harlan and 4 more	57 min
May 23, 6:37 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 4 more	23 min

Nearby

Mesoscale Discussions in Nebraska, 2008 Every mesoscale discussion in 2008

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.