Alert archive / Nebraska / Mesoscale Discussions in 2009

Mesoscale Discussion 964

June 6, 200938 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2009, 9:28 PM CDT for 38 counties in Nebraska. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2009, 9:28 PM CDT (02:28 UTC)
Expired: Jun 6, 2009, 11:00 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 38 counties

Adams County, NE, Arthur County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garden County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Hayes County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Phelps County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 55 km from the middle of the area, began a volume at 02:29 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, 2.5 hours before the alert went out and 44 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: 63 J/kg
Mixed-layer CIN: -295 J/kg
Mixed-layer LCL: 2465 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 242 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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
Jun 6, 9:01 PM CDT	Severe Thunderstorm Watch	SPC	Cass, Clay, Fillmore, Gage, Jefferson, Johnson and 8 more	6 hr
Jun 6, 11:04 PM CDT	Mesoscale Discussion	SPC	Cass, Clay, Fillmore, Gage, Jefferson, Johnson and 8 more	86 min
Jun 7, 12:44 AM CDT	Mesoscale Discussion	SPC	Cass, Douglas, Gage, Johnson, Lancaster, Nemaha and 5 more	61 min
Jun 7, 1:35 AM CDT	Mesoscale Discussion	SPC	Arthur, Chase, Cheyenne, Deuel, Dundy, Garden and 8 more	55 min
Jun 7, 4:45 AM CDT	Mesoscale Discussion	SPC	Johnson, Nemaha, Pawnee, Richardson	30 min
Jun 7, 11:16 AM CDT	Mesoscale Discussion	SPC	Antelope, Boyd, Burt, Cedar, Cuming, Dakota and 12 more	119 min
Jun 7, 2:31 PM CDT	Mesoscale Discussion	SPC	Banner, Cheyenne, Deuel, Garden, Kimball, Morrill	59 min
Jun 7, 2:36 PM CDT	Mesoscale Discussion	SPC	Cass, Gage, Johnson, Nemaha, Otoe, Pawnee and 1 more	114 min
Jun 7, 3:30 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy	60 min
Jun 7, 3:45 PM CDT	Tornado Watch	SPC	Cass, Douglas, Gage, Jefferson, Johnson, Lancaster and 7 more	7 hr
Jun 7, 5:31 PM CDT	Severe Thunderstorm Watch	SPC	Dundy, Hitchcock, Red Willow	5 hr

Nearby

Mesoscale Discussions in Nebraska, 2009 Every mesoscale discussion in 2009

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.