Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 1731

July 11, 20059 counties in Colorado; Cheyenne County, Sherman County, Wallace County, Kansas; 16 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2005, 6:33 PM MDT for 9 counties in Colorado; Cheyenne County, Sherman County, Wallace County, Kansas; 16 counties in Nebraska. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Jul 11, 2005, 6:33 PM MDT (00:33 UTC)
Expired: Jul 11, 2005, 8:30 PM MDT
In force: 117 min
Issued by: the Storm Prediction Center

All 28 counties

Cheyenne County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Sherman County, KS, Wallace County, KS, Arthur County, NE, Box Butte County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Sheridan County, NE

The radar

The Denver radar (KFTG), 158 km from the middle of the area, began a volume at 00:33 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, 0.6 hours before the alert went out and 211 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: 456 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 2041 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

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 12, 2:10 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Bent, Cheyenne, Crowley, Denver and 13 more	2 hr
Jul 12, 11:43 AM MDT	Mesoscale Discussion	SPC	Butler, Cowley, Ellsworth, Harper, Harvey, Kingman and 7 more	3 hr

Nearby

Mesoscale Discussions in Nebraska, 2005 Mesoscale Discussions in Colorado, 2005 Mesoscale Discussions in Kansas, 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.