Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 994

May 23, 200812 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 23, 2008, 10:14 PM MDT for 12 counties in Nebraska. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: May 23, 2008, 10:14 PM MDT (04:14 UTC)
Expired: May 23, 2008, 11:15 PM MDT
In force: 61 min
Issued by: the Storm Prediction Center

Counties Arthur County, NE, Dawson County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, McPherson County, NE, Perkins County, NE, Sheridan County, NE

The radar

The North Platte radar (KLNX), 87 km from the middle of the area, began a volume at 04:14 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, 4.2 hours before the alert went out and 27 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 573 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 281 m²/s²
0-3 km storm-relative helicity: 224 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 23, 6:07 PM MDT	Tornado Watch	SPC	Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 13 more	5 hr
May 23, 7:17 PM MDT	Mesoscale Discussion	SPC	Adams, Buffalo, Chase, Clay, Dawson, Dundy and 24 more	58 min
May 23, 7:48 PM MDT	Tornado Watch PDS	SPC	Adams, Clay, Fillmore, Franklin, Furnas, Gosper and 8 more	6 hr
May 23, 9:33 PM MDT	Mesoscale Discussion	SPC	Adams, Clay, Fillmore, Franklin, Furnas, Gosper and 8 more	57 min
May 24, 12:18 PM MDT	Mesoscale Discussion	SPC	Keya Paha	57 min
May 24, 1:17 PM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Butler and 27 more	118 min
May 24, 2:08 PM MDT	Tornado Watch	SPC	Adams, Antelope, Boone, Boyd, Brown, Buffalo and 45 more	6 hr
May 24, 5:33 PM MDT	Mesoscale Discussion	SPC	Adams, Boone, Burt, Butler, Cass, Cedar and 34 more	117 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.