Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 1728
The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2011, 6:35 PM CDT for 18 counties in Kansas; 4 counties in Nebraska. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Jul 24, 2011, 6:35 PM CDT (23:35 UTC)
- Expired
- Jul 24, 2011, 7:30 PM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 22 counties
Atchison County, KS, Clay County, KS, Cloud County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Gage County, NE, Jefferson County, NE, Pawnee County, NE, Saline County, NE
The radar
The Topeka radar (KTWX), 68 km from the middle of the area, began a volume at 23:38 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 (KTOP), launched 12:00Z, 11.6 hours before the alert went out and 99 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
- 1035 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 1265 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- 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 |
|---|---|---|---|---|
| Jul 24, 1:40 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Butler, Chase, Chautauqua, Clark and 24 more | 95 min |
| Jul 24, 6:53 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Cloud, Dickinson, Douglas, Franklin, Geary and 20 more | 3 hr |
| Jul 24, 3:06 PM CDT | Mesoscale Discussion | SPC | Banner, Dawes, Kimball, Scotts Bluff, Sioux | 84 min |
Nearby
Mesoscale Discussions in Kansas, 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.