Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 2038

September 29, 2007Baca County, Prowers County, Colorado; 14 counties in Kansas; 22 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Sep 29, 2007, 8:31 PM MDT for Baca County, Prowers County, Colorado; 14 counties in Kansas; 22 counties in Nebraska. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Sep 29, 2007, 8:31 PM MDT (02:31 UTC)
Expired: Sep 29, 2007, 10:00 PM MDT
In force: 89 min
Issued by: the Storm Prediction Center

All 38 counties

Baca County, CO, Prowers County, CO, Cheyenne County, KS, Decatur County, KS, Greeley County, KS, Hamilton County, KS, Kearny County, KS, Logan County, KS, Rawlins County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Stanton County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Blaine County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Gosper County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Rock County, NE, Thomas County, NE

The radar

The Goodland radar (KGLD), 108 km from the middle of the area, began a volume at 02:34 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 696Sep 29, 9:40 PM MDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.5 hours before the alert went out and 110 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: 2348 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1804 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 248 m²/s²
0-3 km storm-relative helicity: 365 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 22.4

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
Sep 29, 9:38 PM MDT	Severe Thunderstorm Watch	SPC	Gove, Graham, Norton, Phillips, Rooks, Sheridan	3 hr
Sep 30, 11:10 AM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Butler and 37 more	65 min
Sep 30, 11:37 AM MDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Butler and 35 more	7 hr
Sep 30, 1:26 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Coffey, Cowley and 16 more	64 min
Sep 30, 5:13 PM MDT	Mesoscale Discussion	SPC	Cherokee, Crawford, Labette	92 min
Sep 30, 10:01 AM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Butler and 32 more	59 min
Sep 30, 12:02 PM MDT	Tornado Watch	SPC	Burt, Butler, Cass, Cedar, Clay, Colfax and 32 more	7 hr
Sep 30, 2:36 PM MDT	Mesoscale Discussion	SPC	Burt, Cedar, Cuming, Dakota, Dixon, Thurston and 2 more	54 min

Nearby

Mesoscale Discussions in Nebraska, 2007 Mesoscale Discussions in Kansas, 2007 Mesoscale Discussions in Colorado, 2007 Every mesoscale discussion in 2007

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.