Alert archive / Kansas / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 314
The Storm Prediction Center issued this severe thunderstorm watch at May 20, 2011, 2:32 PM CDT for 36 counties in Kansas; 23 counties in Nebraska; 8 counties in Oklahoma. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2011, 2:32 PM CDT (19:32 UTC)
- Expired
- May 20, 2011, 9:57 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 67 counties
Barber County, KS, Barton County, KS, Clark County, KS, Clay County, KS, Cloud County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Harper County, KS, Harvey County, KS, Jewell County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Marion County, KS, McPherson County, KS, Mitchell County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Phillips County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Smith County, KS, Stafford County, KS, Sumner County, KS, Washington County, KS, Adams County, NE, Buffalo County, NE, Butler County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Polk County, NE, Saline County, NE, Seward County, NE, Sherman County, NE, Thayer County, NE, Webster County, NE, York County, NE, Alfalfa County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Major County, OK, Woods County, OK, Woodward County, OK
The radar
The Grand Island radar (KUEX), 123 km from the middle of the area, began a volume at 19:35 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- 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
- 70%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 5:37 PM CDT | Severe Thunderstorm Warning | DDC | Pratt | 38 min |
| May 20, 5:58 PM CDT | Severe Thunderstorm Warning | ICT | Reno | 62 min |
| May 20, 6:50 PM CDT | Severe Thunderstorm Warning | DDC | Pratt | 40 min |
| May 20, 8:00 PM CDT | Severe Thunderstorm Warning | DDC | Pratt | 30 min |
| May 20, 8:11 PM CDT | Severe Thunderstorm Warning | ICT | Kingman | 64 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
Dodge City, (KDDC), launched 12:00Z, 7.5 hours before the alert went out and 196 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3052 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -59 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 8:17 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 29 more | 118 min |
| May 19, 8:46 PM CDT | Tornado Watch | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 34 more | 6 hr |
| May 19, 11:13 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 29 more | 2 hr |
| May 20, 9:11 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Cherokee, Crawford, Douglas and 9 more | 2 hr |
| May 20, 1:52 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Comanche, Edwards, Ellsworth, Jewell and 11 more | 113 min |
| May 20, 6:01 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clay, Cloud, Comanche, Edwards and 27 more | 59 min |
| May 19, 7:47 PM CDT | Mesoscale Discussion | SPC | Caddo, Canadian, Comanche, Cotton, Grady, Kiowa and 1 more | 118 min |
| May 19, 11:39 PM CDT | Severe Thunderstorm Watch | SPC | Harmon, Jackson, Tillman | 6 hr |
| May 20, 2:58 AM CDT | Mesoscale Discussion | SPC | Comanche, Jackson, Kiowa, Tillman, Washita | 92 min |
| May 20, 10:30 AM CDT | Mesoscale Discussion | SPC | Bryan, Choctaw, Haskell, Latimer, LeFlore, McCurtain and 2 more | 60 min |
| May 20, 11:03 AM CDT | Tornado Watch | SPC | Adair, Choctaw, Haskell, Latimer, LeFlore, McCurtain and 2 more | 7 hr |
| May 20, 1:28 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Choctaw, Haskell, Latimer, LeFlore and 3 more | 62 min |
| May 20, 4:00 PM CDT | Mesoscale Discussion | SPC | Choctaw, LeFlore, McCurtain, Pushmataha | 60 min |
| May 20, 5:56 PM CDT | Tornado Watch | SPC | McCurtain | 3 hr |
Nearby
Severe Thunderstorm Watches in Kansas, 2011Severe Thunderstorm Watches in Nebraska, 2011Severe Thunderstorm Watches in Oklahoma, 2011Every severe thunderstorm watch 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.