Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 1684
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2011, 10:16 PM CDT for 43 counties in Kansas; 21 counties in Missouri; 19 counties in Nebraska. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2011, 10:16 PM CDT (03:16 UTC)
- Expired
- Jul 21, 2011, 11:45 PM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 83 counties
Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Decatur County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Gove County, KS, Graham County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Johnson County, KS, Leavenworth County, KS, Lincoln County, KS, Marshall County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Ness County, KS, Norton County, KS, Osage County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Sheridan County, KS, Smith County, KS, Trego County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Carroll 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, Jackson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, Sullivan County, MO, Adams County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage County, NE, Harlan County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Thayer County, NE, Webster County, NE
The radar
The Topeka radar (KTWX), 90 km from the middle of the area, began a volume at 03:19 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.3 hours before the alert went out and 179 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.
- Mixed-layer CAPE
- 2480 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1131 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 460 m²/s²
- Significant tornado parameter
- 3.8
- Supercell composite
- 43.2
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:10 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Gove, Greeley, Logan, Norton and 7 more | 95 min |
| Jul 21, 7:47 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Ellis, Gove, Graham, Greeley and 19 more | 4 hr |
| Jul 21, 7:09 PM CDT | Mesoscale Discussion | SPC | Clark, Mercer, Putnam, Schuyler, Scotland | 96 min |
| Jul 21, 10:44 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Holt, Nodaway | 89 min |
| Jul 22, 6:22 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Boyd, Brown, Chase, Cherry and 17 more | 53 min |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Nebraska, 2011Every mesoscale discussion in 2011
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.