Alert archive / Kansas / Mesoscale Discussions in 2015
Mesoscale Discussion 1774
The Storm Prediction Center issued this mesoscale discussion at Sep 7, 2015, 6:23 PM CDT for 24 counties in Kansas; 6 counties in Nebraska. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Sep 7, 2015, 6:23 PM CDT (23:23 UTC)
- Expired
- Sep 7, 2015, 8:00 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 30 counties
Chase County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellsworth County, KS, Geary County, KS, Harvey County, KS, Jewell County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Gage County, NE, Jefferson County, NE, Nuckolls County, NE, Pawnee County, NE, Thayer County, NE, Webster County, NE
The radar
The Topeka radar (KTWX), 126 km from the middle of the area, began a volume at 23:25 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
Topeka, KS (KFOE), launched 12:00Z, 11.4 hours before the alert went out and 175 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
- 898 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 1268 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 291 m²/s²
- 0-3 km storm-relative helicity
- 328 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
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 |
|---|---|---|---|---|
| Sep 7, 2:18 PM CDT | Mesoscale Discussion | SPC | Brown, Cloud, Jewell, Marshall, Mitchell, Nemaha and 2 more | 87 min |
| Sep 7, 3:37 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more | 6 hr |
| Sep 7, 5:46 PM CDT | Mesoscale Discussion | SPC | Cheyenne | 119 min |
| Sep 7, 6:38 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Butler, Chase, Greenwood, Marion, Woodson | 3 hr |
| Sep 7, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Graham, Norton, Rawlins, Sheridan and 2 more | 2 hr |
| Sep 6, 8:42 PM CDT | Mesoscale Discussion | SPC | Cass, Douglas, Gage, Johnson, Lancaster, Nemaha and 4 more | 93 min |
| Sep 6, 11:41 PM CDT | Mesoscale Discussion | SPC | Cass, Gage, Johnson, Lancaster, Nemaha, Otoe and 2 more | 64 min |
Nearby
Mesoscale Discussions in Kansas, 2015Mesoscale Discussions in Nebraska, 2015Every mesoscale discussion in 2015
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.