Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 2104

August 28, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Aug 28, 2005, 5:09 PM CDT for 4 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Aug 28, 2005, 5:09 PM CDT (22:09 UTC)
Expired: Aug 28, 2005, 6:45 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

All 63 counties

Adams County, IA, Cass 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, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Washington County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, Worth County, MO, Adams County, NE, Buffalo County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Gosper County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Richardson County, NE, Saline County, NE, Thayer County, NE, Webster County, NE

The radar

The Omaha radar (KOAX), 111 km from the middle of the area, began a volume at 22:08 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 753Aug 28, 5:25 PM CDT

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.2 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: 443 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 1515 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 60 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
Aug 28, 3:21 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Cass, Fremont, Mills, Montgomery and 5 more	84 min
Aug 27, 10:04 PM CDT	Mesoscale Discussion	SPC	Decatur, Finney, Gove, Graham, Lane, Logan and 6 more	56 min
Aug 28, 2:42 PM CDT	Mesoscale Discussion	SPC	Atchison, Barton, Brown, Chase, Clay, Cloud and 35 more	2 hr
Aug 28, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 7 more	3 hr
Aug 28, 11:49 AM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Blaine, Boone, Brown, Buffalo and 46 more	116 min
Aug 28, 12:20 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Butler, Clay, Colfax, Fillmore, Gage and 23 more	7 hr

Nearby

Mesoscale Discussions in Nebraska, 2005 Mesoscale Discussions in Missouri, 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.