Alert archive / Kansas / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 87
The Storm Prediction Center issued this severe thunderstorm watch at Apr 9, 2013, 5:45 PM CDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2013, 5:45 PM CDT (22:45 UTC)
- Expired
- Apr 10, 2013, 1:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 33 counties
Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Brown County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Geary County, KS, Jackson County, KS, Lyon County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Atchison County, MO, Cass County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Seward County, NE
The radar
The Topeka radar (KTWX), 105 km from the middle of the area, began a volume at 22:48 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 5:53 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie, Riley | 37 min |
| Apr 9, 6:09 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Nemaha | 36 min |
| Apr 9, 6:17 PM CDT | Severe Thunderstorm Warning | OAX | Lancaster | 28 min |
| Apr 9, 6:19 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Lancaster, Saunders, Seward | 26 min |
| Apr 9, 6:22 PM CDT | Severe Thunderstorm Warning | OAX | Pawnee | 23 min |
| Apr 9, 6:45 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha, Pawnee, Richardson | 30 min |
| Apr 9, 7:10 PM CDT | Severe Thunderstorm Warning | EAX | Atchison | 35 min |
| Apr 9, 7:11 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha | 34 min |
| Apr 9, 8:06 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Sarpy | 24 min |
| Apr 9, 8:54 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Republic | 36 min |
| Apr 9, 10:12 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 18 min |
| Apr 9, 10:35 PM CDT | Severe Thunderstorm Warning | TOP | Lyon | 25 min |
| Apr 9, 10:57 PM CDT | Severe Thunderstorm Warning | TOP | Lyon, Wabaunsee | 33 min |
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 (KTOP), launched 12:00Z, 10.8 hours before the alert went out and 145 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
- 321 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 818 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 456 m²/s²
- 0-3 km storm-relative helicity
- 453 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 11:15 PM CDT | Mesoscale Discussion | SPC | Harrison | 90 min |
| Apr 9, 5:12 AM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Buena Vista, Butler, Calhoun, Carroll and 25 more | 93 min |
| Apr 9, 10:27 AM CDT | Mesoscale Discussion | SPC | Clayton, Dubuque | 3 hr |
| Apr 8, 8:43 PM CDT | Mesoscale Discussion | SPC | Cheyenne | 62 min |
| Apr 9, 12:30 PM CDT | Mesoscale Discussion | SPC | Decatur, Graham, Norton, Phillips, Rawlins, Sheridan and 1 more | 4 hr |
| Apr 9, 3:00 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Barber, Barton, Bourbon and 66 more | 2 hr |
| Apr 9, 5:33 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Barton, Butler, Chase, Comanche, Cowley and 18 more | 7 hr |
| Apr 9, 6:46 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Blaine, Box Butte, Boyd, Brown and 18 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Kansas, 2013Severe Thunderstorm Watches in Nebraska, 2013Severe Thunderstorm Watches in Iowa, 2013Every severe thunderstorm watch in 2013
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.