Alert archive / Oklahoma / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 572
The Storm Prediction Center issued this severe thunderstorm watch at Jun 28, 2011, 3:53 PM CDT for 14 counties in Oklahoma; 8 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 28, 2011, 3:53 PM CDT (20:53 UTC)
- Expired
- Jun 28, 2011, 11:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 22 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Cooke County, TX, Delta County, TX, Fannin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Rains County, TX
The radar
The Western Arkansas radar (KSRX), 180 km from the middle of the area, began a volume at 20:54 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
- 30%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 4:08 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 52 min |
| Jun 28, 4:24 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 66 min |
| Jun 28, 5:11 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 64 min |
| Jun 28, 6:10 PM CDT | Severe Thunderstorm Warning | OUN | Atoka | 65 min |
| Jun 28, 6:12 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pittsburg, Pushmataha | 63 min |
| Jun 28, 6:30 PM CDT | Severe Thunderstorm Warning | FWD | Lamar | 45 min |
| Jun 28, 6:31 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 44 min |
| Jun 28, 6:37 PM CDT | Severe Thunderstorm Warning | OUN | Atoka | 38 min |
| Jun 28, 7:04 PM CDT | Severe Thunderstorm Warning | OUN | Atoka | 56 min |
| Jun 28, 7:13 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 47 min |
| Jun 28, 7:25 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw | 65 min |
| Jun 28, 7:25 PM CDT | Severe Thunderstorm Warning | FWD | Hopkins | 41 min |
| Jun 28, 7:44 PM CDT | Severe Thunderstorm Warning | FWD | Lamar | 61 min |
| Jun 28, 7:47 PM CDT | Severe Thunderstorm Warning | OUN | Coal | 43 min |
| Jun 28, 8:06 PM CDT | Severe Thunderstorm Warning | OUN | Bryan | 39 min |
| Jun 28, 8:27 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw | 33 min |
| Jun 28, 9:48 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Murray | 30 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, 8.9 hours before the alert went out and 183 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
- 2412 J/kg
- Mixed-layer CIN
- -219 J/kg
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 165 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 |
|---|---|---|---|---|
| Jun 28, 11:42 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, McCurtain, Pushmataha | 93 min |
| Jun 28, 11:51 AM CDT | Severe Thunderstorm Watch | SPC | McCurtain | 7 hr |
| Jun 28, 3:09 PM CDT | Mesoscale Discussion | SPC | LeFlore, McCurtain, Sequoyah | 96 min |
| Jun 28, 3:29 PM CDT | Mesoscale Discussion | SPC | Cimarron | 91 min |
| Jun 28, 6:09 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Coal, Johnston, Love and 5 more | 96 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2011Severe Thunderstorm Watches in Texas, 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.