Alert archive / Oklahoma / Tornado Watches in 2009
Tornado Watch 186
The Storm Prediction Center issued this tornado watch at Apr 25, 2009, 10:39 PM CDT for 11 counties in Kansas; 19 counties in Oklahoma. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2009, 10:39 PM CDT (03:39 UTC)
- Expired
- Apr 26, 2009, 2:52 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 30 counties
Allen County, KS, Chautauqua County, KS, Cowley County, KS, Elk County, KS, Harper County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Alfalfa County, OK, Blaine County, OK, Craig County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Washington County, OK, Woods County, OK, Woodward County, OK
The radar
The Wichita radar (KICT), 89 km from the middle of the area, began a volume at 03:39 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
- 40%
- One or more EF2 to EF5 tornadoes
- 40%
- 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
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 10:41 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Grant, Major | 46 min |
| Apr 25, 10:42 PM CDT | Tornado Warning | OUN | Garfield, Grant | 63 min |
| Apr 25, 11:09 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Major | 66 min |
| Apr 25, 11:33 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Kingfisher | 27 min |
| Apr 25, 11:36 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Major, Woods | 54 min |
| Apr 25, 11:47 PM CDT | Tornado Warning | OUN | Grant | 43 min |
| Apr 25, 11:58 PM CDT | Tornado Warning | OUN | Alfalfa, Major | 47 min |
| Apr 26, 12:05 AM CDT | Severe Thunderstorm Warning | OUN | Kay | 55 min |
| Apr 26, 12:12 AM CDT | Tornado Warning | OUN | Kay | 48 min |
| Apr 26, 12:27 AM CDT | Severe Thunderstorm Warning | OUN | Garfield | 63 min |
| Apr 26, 12:40 AM CDT | Tornado Warning | OUN | Alfalfa, Garfield, Grant, Major | 65 min |
| Apr 26, 12:52 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant | 53 min |
| Apr 26, 1:39 AM CDT | Tornado Warning | OUN | Garfield, Grant | 66 min |
| Apr 26, 1:43 AM CDT | Severe Thunderstorm Warning | OUN | Grant | 32 min |
| Apr 26, 2:42 AM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Noble | 63 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
Norman, OK (KOUN), launched 00:00Z, 3.7 hours before the alert went out and 211 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
- 1154 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1359 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 9.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 7:17 PM CDT | Mesoscale Discussion | SPC | Johnson, Leavenworth, Wyandotte | 58 min |
| Apr 25, 9:58 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Clay and 40 more | 92 min |
| Apr 25, 10:09 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Atchison, Brown, Clay, Cloud, Coffey and 24 more | 6 hr |
| Apr 26, 1:28 AM CDT | Mesoscale Discussion | SPC | Allen, Barber, Chautauqua, Cowley, Elk, Greenwood and 7 more | 92 min |
| Apr 26, 2:10 AM CDT | Mesoscale Discussion | SPC | Anderson, Atchison, Brown, Clay, Coffey, Dickinson and 20 more | 95 min |
| Apr 26, 2:39 AM CDT | Tornado Watch | SPC | Allen, Chautauqua, Cowley, Elk, Harper, Labette and 5 more | 3 hr |
| Apr 26, 5:47 AM CDT | Mesoscale Discussion | SPC | Barton, Dickinson, Edwards, Ellsworth, Ford, Lincoln and 8 more | 58 min |
| Apr 26, 5:58 AM CDT | Tornado Watch | SPC | Barton, Chase, Clark, Clay, Comanche, Dickinson and 24 more | 7 hr |
| Apr 26, 9:18 AM CDT | Mesoscale Discussion | SPC | Cloud, Jewell, Mitchell, Republic, Washington | 27 min |
| Apr 26, 10:19 AM CDT | Mesoscale Discussion | SPC | Barber, Butler, Comanche, Cowley, Dickinson, Ellsworth and 14 more | 56 min |
| Apr 26, 10:54 AM CDT | Mesoscale Discussion | SPC | Atchison, Barber, Barton, Butler, Chase, Chautauqua and 42 more | 66 min |
| Apr 26, 11:07 AM CDT | Tornado Watch | SPC | Barber, Barton, Brown, Butler, Chase, Clark and 40 more | 7 hr |
| Apr 26, 12:27 PM CDT | Mesoscale Discussion | SPC | Barton, Clark, Clay, Cloud, Edwards, Ellsworth and 12 more | 2 hr |
| Apr 26, 2:41 PM CDT | Mesoscale Discussion | SPC | Barber, Brown, Butler, Chase, Clay, Cloud and 29 more | 3 hr |
| Apr 26, 5:02 PM CDT | Tornado Watch | SPC | Anderson, Atchison, Brown, Coffey, Doniphan, Douglas and 13 more | 6 hr |
| Apr 26, 5:44 PM CDT | Mesoscale Discussion | SPC | Barber, Butler, Cowley, Harper, Harvey, Kingman and 5 more | 61 min |
| Apr 26, 6:14 PM CDT | Mesoscale Discussion | SPC | Anderson, Atchison, Brown, Chase, Coffey, Doniphan and 16 more | 61 min |
| Apr 26, 6:16 PM CDT | Tornado Watch | SPC | Allen, Barber, Butler, Chase, Chautauqua, Comanche and 16 more | 8 hr |
| Apr 26, 6:56 AM CDT | Mesoscale Discussion | SPC | Beckham, Ellis, Harper, Roger Mills | 94 min |
| Apr 26, 12:58 PM CDT | Mesoscale Discussion | SPC | Harmon, Jackson | 92 min |
| Apr 26, 1:37 PM CDT | Tornado Watch | SPC | Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 21 more | 5 hr |
| Apr 26, 3:34 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 24 more | 116 min |
Nearby
Tornado Watches in Oklahoma, 2009Tornado Watches in Kansas, 2009Every tornado watch in 2009
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.