Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 1886

July 23, 200846 counties in Nebraska; Bennett County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2008, 8:09 PM CDT for 46 counties in Nebraska; Bennett County, South Dakota. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jul 23, 2008, 8:09 PM CDT (01:09 UTC)
Expired: Jul 23, 2008, 9:45 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 47 counties

Adams County, NE, Arthur County, NE, Blaine County, NE, Boone County, NE, Brown County, NE, Buffalo County, NE, Cherry County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Fillmore County, NE, Frontier County, NE, Garden County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Hayes County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Perkins County, NE, Phelps County, NE, Polk County, NE, Rock County, NE, Saline County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE, Bennett County, SD

The radar

The North Platte radar (KLNX), 63 km from the middle of the area, began a volume at 01:09 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, 1.2 hours before the alert went out and 43 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: 3475 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 1511 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 457 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 24.9

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
Jul 23, 10:45 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Butler, Cass, Cedar and 18 more	7 hr
Jul 24, 1:46 AM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Burt, Butler, Cass, Cedar and 18 more	89 min
Jul 24, 10:47 AM CDT	Mesoscale Discussion	SPC	Blaine, Brown, Cherry, Custer, Logan, Loup and 1 more	118 min
Jul 24, 3:04 PM CDT	Severe Thunderstorm Watch	SPC	Blaine, Boyd, Brown, Cherry, Custer, Dawes and 8 more	7 hr
Jul 24, 3:43 PM CDT	Mesoscale Discussion	SPC	Gage, Jefferson, Pawnee, Thayer	92 min
Jul 24, 5:00 PM CDT	Tornado Watch	SPC	Gage, Jefferson, Johnson, Nemaha, Pawnee, Richardson	6 hr
Jul 24, 2:31 PM CDT	Mesoscale Discussion	SPC	Butte, Custer, Fall River, Lawrence	59 min

Nearby

Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in South Dakota, 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.