Alert archive / Oklahoma / Severe Thunderstorm Watches in 2009
Severe Thunderstorm Watch 403
The Storm Prediction Center issued this severe thunderstorm watch at Jun 13, 2009, 11:02 PM CDT for 26 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 13, 2009, 11:02 PM CDT (04:02 UTC)
- Expired
- Jun 14, 2009, 4:35 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 26 counties
Adair County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 59 km from the middle of the area, began a volume at 04:03 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
- 10%
- Ten or more severe wind reports
- 40%
- 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
- 80%
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 11:27 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, McIntosh, Pittsburg | 48 min |
| Jun 14, 12:17 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Haskell, Muskogee, Sequoyah | 58 min |
| Jun 14, 12:36 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee, Okmulgee, Wagoner | 29 min |
| Jun 14, 12:51 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Sequoyah | 24 min |
| Jun 14, 1:08 AM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 29 min |
| Jun 14, 1:12 AM CDT | Severe Thunderstorm Warning | TSA | Adair | 63 min |
| Jun 14, 1:20 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 53 min |
| Jun 14, 1:27 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 50 min |
| Jun 14, 1:38 AM CDT | Severe Thunderstorm Warning | SHV | McCurtain | 37 min |
| Jun 14, 3:07 AM CDT | Severe Thunderstorm Warning | TSA | Nowata, Osage, Washington | 53 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, 4.0 hours before the alert went out and 155 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
- 3675 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 876 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 3.9
- Supercell composite
- 18.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 10:33 PM CDT | Mesoscale Discussion | SPC | Crawford, Howard, Polk, Scott, Sebastian | 57 min |
| Jun 14, 1:51 AM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Calhoun, Carroll, Clark and 40 more | 4 hr |
| Jun 14, 5:26 AM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Calhoun, Clark, Cleburne, Cleveland and 33 more | 94 min |
| Jun 14, 12:07 PM CDT | Mesoscale Discussion | SPC | Ashley, Chicot | 83 min |
| Jun 13, 7:46 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 29 more | 59 min |
| Jun 13, 8:19 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 34 more | 8 hr |
| Jun 14, 1:05 PM CDT | Mesoscale Discussion | SPC | Cimarron, Texas | 85 min |
| Jun 14, 4:11 PM CDT | Tornado Watch | SPC | Beaver, Ellis, Harper, Texas, Woods, Woodward | 7 hr |
| Jun 14, 6:18 PM CDT | Mesoscale Discussion | SPC | Beckham, Comanche, Cotton, Custer, Greer, Harmon and 5 more | 57 min |
| Jun 14, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2009Every severe thunderstorm 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.