Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 389

March 30, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2007, 11:44 PM CDT for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2007, 11:44 PM CDT (04:44 UTC)
Expired: Mar 31, 2007, 12:45 AM CDT
In force: 61 min
Issued by: the Storm Prediction Center

All 37 counties

Adair County, IA, Adams County, IA, Cass County, IA, Clarke County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Marshall County, KS, Nemaha County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Cass 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

The radar

The Omaha radar (KOAX), 112 km from the middle of the area, began a volume at 04:47 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 00:00Z, 4.7 hours before the alert went out and 156 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: 312 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 786 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.1
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
Mar 31, 10:30 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 46 more	90 min
Mar 31, 11:38 AM CDT	Tornado Watch	SPC	Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 50 more	7 hr
Mar 31, 1:47 PM CDT	Tornado Watch	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 37 more	7 hr
Mar 31, 2:38 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 29 more	97 min
Mar 30, 7:12 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 19 more	63 min
Mar 30, 7:55 PM CDT	Tornado Watch	SPC	Allen, Anderson, Bourbon, Chase, Chautauqua, Cherokee and 25 more	7 hr
Mar 30, 9:56 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Butler, Chase, Chautauqua, Clay and 23 more	2 hr
Mar 31, 12:57 PM CDT	Mesoscale Discussion	SPC	Audrain, Boone, Callaway, Camden, Chariton, Cole and 33 more	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2007 Mesoscale Discussions in Iowa, 2007 Mesoscale Discussions in Missouri, 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.