Alert archive / Oklahoma / Severe Thunderstorm Watches in 2013
Severe Thunderstorm Watch 451
The Storm Prediction Center issued this severe thunderstorm watch at Jul 29, 2013, 10:41 PM CDT for 22 counties in Oklahoma. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 29, 2013, 10:41 PM CDT (03:41 UTC)
- Expired
- Jul 30, 2013, 3:26 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 22 counties
Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, McClain County, OK, Oklahoma County, OK, Roger Mills County, OK, Stephens County, OK, Washita County, OK
The radar
The Altus AFB radar (KFDR), 137 km from the middle of the area, began a volume at 03:44 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 10:59 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Custer, Dewey, Kingfisher | 46 min |
| Jul 29, 11:17 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Caddo, Canadian, Kingfisher | 43 min |
| Jul 29, 11:23 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Roger Mills | 52 min |
| Jul 29, 11:55 PM CDT | Severe Thunderstorm Warning | OUN | Logan, Oklahoma, Payne | 50 min |
| Jul 30, 12:00 AM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher | 45 min |
| Jul 30, 12:40 AM CDT | Flash Flood Warning | OUN | Kingfisher, Logan, Payne | 3 hr |
| Jul 30, 1:02 AM CDT | Severe Thunderstorm Warning | OUN | Custer, Washita | 43 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 142 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
- 2590 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 856 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 292 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 13.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 7:59 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Craig, Creek, Dewey, Ellis and 18 more | 91 min |
| Jul 29, 10:18 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Creek and 21 more | 87 min |
| Jul 30, 2:44 AM CDT | Mesoscale Discussion | SPC | Beckham, Caddo, Cleveland, Comanche, Garvin, Grady and 7 more | 91 min |
| Jul 30, 3:52 PM CDT | Mesoscale Discussion | SPC | Garvin, Haskell, Hughes, Latimer, McClain, McIntosh and 4 more | 53 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2013Every severe thunderstorm watch in 2013
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.