Alert archive / Nebraska / Mesoscale Discussions in 2006

Mesoscale Discussion 396

April 1, 200613 counties in Kansas; 16 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2006, 7:38 PM CST for 13 counties in Kansas; 16 counties in Nebraska. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Apr 1, 2006, 7:38 PM CST (01:38 UTC)
Expired: Apr 1, 2006, 9:15 PM CST
In force: 97 min
Issued by: the Storm Prediction Center

All 29 counties

Clay County, KS, Dickinson County, KS, Geary County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Adams County, NE, Clay County, NE, Fillmore County, NE, Gage County, NE, Hall County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Merrick County, NE, Nuckolls County, NE, Pawnee County, NE, Saline County, NE, Seward County, NE, Thayer County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 117 km from the middle of the area, began a volume at 01:40 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 125Apr 1, 7:55 PM CST

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 1.6 hours before the alert went out and 165 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2111 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 333 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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
Apr 1, 6:24 PM CST	Tornado Watch	SPC	Butler, Chase, Cowley, Harper, Harvey, Kingman and 6 more	6 hr
Apr 1, 7:52 PM CST	Severe Thunderstorm Watch	SPC	Clay, Cloud, Dickinson, Geary, Marshall, Morris and 6 more	4 hr
Apr 1, 10:35 PM CST	Severe Thunderstorm Watch	SPC	Allen, Chautauqua, Elk, Greenwood, Labette, Montgomery and 3 more	2 hr
Apr 1, 11:36 PM CST	Severe Thunderstorm Watch	SPC	Bourbon, Cherokee, Crawford	4 hr
Apr 2, 12:44 AM CST	Mesoscale Discussion	SPC	Bourbon, Johnson, Leavenworth, Linn, Miami, Wyandotte	2 hr
Apr 2, 9:41 AM CDT	Mesoscale Discussion	SPC	Anderson, Atchison, Bourbon, Brown, Clay, Cloud and 18 more	2 hr
Apr 2, 1:13 PM CDT	Severe Thunderstorm Watch	SPC	Atchison, Doniphan, Leavenworth, Wyandotte	4 hr

Nearby

Mesoscale Discussions in Nebraska, 2006 Mesoscale Discussions in Kansas, 2006 Every mesoscale discussion in 2006

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.