Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 1403

June 20, 200517 counties in Nebraska; 9 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2005, 1:13 PM MDT for 17 counties in Nebraska; 9 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 20, 2005, 1:13 PM MDT (19:13 UTC)
Expired: Jun 20, 2005, 3:15 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 26 counties

Banner County, NE, Box Butte County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keya Paha County, NE, Kimball County, NE, Morrill County, NE, Rock County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Aurora County, SD, Bennett County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Douglas County, SD, Gregory County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 88 km from the middle of the area, began a volume at 19:14 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 12:00Z, 7.2 hours before the alert went out and 168 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: 2486 J/kg
Mixed-layer CIN: -230 J/kg
Mixed-layer LCL: 874 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 74 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
Jun 20, 2:45 PM MDT	Severe Thunderstorm Watch	SPC	Dakota, Dixon	6 hr
Jun 20, 5:38 PM MDT	Mesoscale Discussion	SPC	Burt, Dakota, Thurston	97 min
Jun 19, 6:55 PM MDT	Severe Thunderstorm Watch	SPC	Butte, Harding, Lawrence	7 hr
Jun 19, 10:43 PM MDT	Mesoscale Discussion	SPC	Lawrence	2 hr
Jun 20, 1:17 AM MDT	Mesoscale Discussion	SPC	Butte, Corson, Harding, Lawrence, Meade, Perkins and 1 more	58 min
Jun 20, 2:00 AM MDT	Severe Thunderstorm Watch	SPC	Butte, Corson, Harding, Perkins, Ziebach	5 hr
Jun 20, 3:40 AM MDT	Mesoscale Discussion	SPC	Brown, Campbell, Corson, Dewey, Edmunds, Harding and 5 more	95 min
Jun 20, 4:20 AM MDT	Severe Thunderstorm Watch	SPC	Brown, Campbell, McPherson, Marshall, Walworth	5 hr
Jun 20, 6:39 AM MDT	Mesoscale Discussion	SPC	Marshall	96 min
Jun 20, 8:19 AM MDT	Mesoscale Discussion	SPC	Marshall	56 min
Jun 20, 9:42 AM MDT	Mesoscale Discussion	SPC	Marshall	63 min
Jun 20, 11:59 AM MDT	Mesoscale Discussion	SPC	Brookings, Clark, Codington, Deuel, Grant, Hamlin and 3 more	91 min
Jun 20, 12:25 PM MDT	Severe Thunderstorm Watch	SPC	Brookings, Clark, Deuel, Hamlin, Kingsbury, Lake and 4 more	7 hr
Jun 20, 3:09 PM MDT	Mesoscale Discussion	SPC	Lawrence, Pennington	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2005 Mesoscale Discussions in South Dakota, 2005 Every mesoscale discussion in 2005

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.