Alert archive / Kansas / Tornado Watches in 2013
Tornado Watch 117
The Storm Prediction Center issued this tornado watch at Apr 17, 2013, 1:50 PM CDT for 18 counties in Kansas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2013, 1:50 PM CDT (18:50 UTC)
- Expired
- Apr 17, 2013, 9:54 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Allen County, KS, Anderson County, KS, Chautauqua County, KS, Coffey County, KS, Cowley County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Jefferson County, KS, Labette County, KS, Lyon County, KS, Montgomery County, KS, Neosho County, KS, Osage County, KS, Shawnee County, KS, Wilson County, KS, Woodson County, KS
The radar
The Topeka radar (KTWX), 75 km from the middle of the area, began a volume at 18:54 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 95%
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Topeka, KS (KFOE), launched 12:00Z, 6.8 hours before the alert went out and 49 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
- 8 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 423 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 667 m²/s²
- 0-3 km storm-relative helicity
- 666 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 12:41 AM CDT | Mesoscale Discussion | SPC | Barber, Butler, Chase, Clark, Comanche, Dickinson and 17 more | 94 min |
| Apr 17, 9:50 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 17 more | 55 min |
| Apr 17, 11:11 AM CDT | Tornado Watch | SPC | Bourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more | 11 hr |
| Apr 17, 1:09 PM CDT | Mesoscale Discussion | SPC | Barber, Butler, Chautauqua, Cowley, Elk, Greenwood and 8 more | 96 min |
| Apr 17, 3:38 PM CDT | Mesoscale Discussion | SPC | Bourbon, Cherokee, Crawford, Johnson, Linn, Miami and 1 more | 97 min |
| Apr 17, 6:02 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 16 more | 88 min |
| Apr 16, 8:44 PM CDT | Mesoscale Discussion | SPC | Saint Louis, City of Saint Louis | 2 hr |
| Apr 17, 8:49 AM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Buchanan, Caldwell, Carroll, Chariton and 25 more | 56 min |
| Apr 17, 9:14 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Clark, Daviess, DeKalb, Gentry and 11 more | 10 hr |
| Apr 17, 1:33 PM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Clark, Daviess, DeKalb, Gentry and 11 more | 57 min |
| Apr 17, 4:19 PM CDT | Mesoscale Discussion | SPC | Scotland | 26 min |
Nearby
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.