Alert archive / Oklahoma / Tornado Watches in 2009
Tornado Watch 192
The Storm Prediction Center issued this tornado watch at Apr 26, 2009, 1:37 PM CDT for 27 counties in Oklahoma; 21 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2009, 1:37 PM CDT (18:37 UTC)
- Expired
- Apr 26, 2009, 6:19 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Particularly dangerous situation
- Yes
- Largest hail expected
- 3 in
- Strongest gust expected
- 70 kt
All 48 counties
Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Childress County, TX, Clay County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Kent County, TX, King County, TX, Knox County, TX, Motley County, TX, Stonewall County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 49 km from the middle of the area, began a volume at 18:38 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 90%
- One or more EF2 to EF5 tornadoes
- 60%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 1:57 PM CDT | Severe Thunderstorm Warning | LUB | King | 48 min |
| Apr 26, 2:20 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 55 min |
| Apr 26, 2:44 PM CDT | Severe Thunderstorm Warning | LUB | King | 17 min |
| Apr 26, 3:13 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman, Knox, Wilbarger | 62 min |
| Apr 26, 4:10 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Tillman | 65 min |
| Apr 26, 4:34 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 56 min |
| Apr 26, 4:39 PM CDT | Severe Thunderstorm Warning | LUB | Childress, Cottle | 23 min |
| Apr 26, 4:54 PM CDT | Severe Thunderstorm Warning | LUB | Dickens, King | 51 min |
| Apr 26, 5:11 PM CDT | Severe Thunderstorm Warning | LUB | Dickens, Kent, King, Stonewall | 49 min |
| Apr 26, 5:13 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Jackson, Kiowa, Tillman | 62 min |
| Apr 26, 5:16 PM CDT | Severe Thunderstorm Warning | LUB | Cottle, King | 44 min |
| Apr 26, 5:19 PM CDT | Severe Thunderstorm Warning | LUB | Dickens, Kent, King, Stonewall | 41 min |
| Apr 26, 5:23 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman | 67 min |
| Apr 26, 5:29 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Harmon, Jackson | 61 min |
| Apr 26, 5:34 PM CDT | Severe Thunderstorm Warning | LUB | Kent | 41 min |
| Apr 26, 5:39 PM CDT | Severe Thunderstorm Warning | LUB | Cottle, King | 66 min |
| Apr 26, 5:49 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman | 56 min |
| Apr 26, 6:06 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 54 min |
| Apr 26, 6:11 PM CDT | Tornado Warning | LUB | Kent, Stonewall | 49 min |
| Apr 26, 6:13 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Kiowa, Washita | 62 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 12:00Z, 6.6 hours before the alert went out and 209 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
- 1610 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 326 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 10.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 9:58 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Canadian, Custer, Dewey, Ellis and 10 more | 92 min |
| Apr 25, 10:39 PM CDT | Tornado Watch | SPC | Alfalfa, Blaine, Craig, Custer, Dewey, Garfield and 13 more | 4 hr |
| Apr 26, 1:28 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Craig, Custer, Dewey, Garfield and 13 more | 92 min |
| Apr 26, 2:39 AM CDT | Tornado Watch | SPC | Craig, Garfield, Grant, Kay, Noble, Nowata and 3 more | 3 hr |
| Apr 26, 6:56 AM CDT | Mesoscale Discussion | SPC | Beckham, Ellis, Harper, Roger Mills | 94 min |
| Apr 26, 10:19 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 8 more | 56 min |
| Apr 26, 10:54 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 33 more | 66 min |
| Apr 26, 11:07 AM CDT | Tornado Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 11 more | 7 hr |
| Apr 26, 12:58 PM CDT | Mesoscale Discussion | SPC | Harmon, Jackson | 92 min |
| Apr 26, 3:34 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 24 more | 116 min |
| Apr 26, 5:44 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 30 more | 61 min |
| Apr 26, 6:16 PM CDT | Tornado Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Carter and 38 more | 8 hr |
| Apr 26, 3:01 PM CDT | Tornado Watch | SPC | Callahan, Coke, Crockett, Fisher, Glasscock, Haskell and 18 more | 5 hr |
| Apr 26, 6:25 PM CDT | Mesoscale Discussion | SPC | Callahan, Coke, Coleman, Concho, Crockett, Edwards and 25 more | 2 hr |
Nearby
Tornado Watches in Oklahoma, 2009Tornado Watches in Texas, 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.