Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 560

April 11, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2005, 5:01 PM CDT for 4 states. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Apr 11, 2005, 5:01 PM CDT (22:01 UTC)
Expired: Apr 11, 2005, 6:00 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center

All 43 counties

Audubon County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Brown County, KS, Clay County, KS, Geary County, KS, Jackson County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Atchison County, MO, Holt County, MO, Burt County, NE, Cass County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE

The radar

The Topeka radar (KTWX), 124 km from the middle of the area, began a volume at 22:03 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

Topeka, KS (KTOP), launched 12:00Z, 10.0 hours before the alert went out and 127 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: 19 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 1068 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 10, 7:49 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 36 more	56 min
Apr 11, 10:55 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 18 more	95 min
Apr 11, 11:55 AM CDT	Tornado Watch	SPC	Audubon, Carroll, Cass, Crawford, Fremont, Greene and 8 more	8 hr
Apr 10, 8:53 PM CDT	Mesoscale Discussion	SPC	Cherokee, Crawford, Labette, Montgomery	2 hr
Apr 10, 9:23 PM CDT	Mesoscale Discussion	SPC	Butler, Clay, Cloud, Cowley, Dickinson, Ellsworth and 14 more	2 hr
Apr 11, 2:01 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 10 more	89 min
Apr 11, 5:40 PM CDT	Severe Thunderstorm Watch	SPC	Doniphan, Johnson, Leavenworth, Linn, Miami, Wyandotte	4 hr
Apr 10, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	Barry, Lawrence, McDonald, Newton, Stone	7 hr
Apr 11, 1:23 AM CDT	Mesoscale Discussion	SPC	Barry, McDonald, Newton, Stone	67 min
Apr 11, 6:17 AM CDT	Mesoscale Discussion	SPC	Butler, Dunklin, Mississippi, New Madrid, Oregon, Pemiscot and 3 more	118 min

Nearby

Mesoscale Discussions in Nebraska, 2005 Mesoscale Discussions in Iowa, 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.