Alert archive / Oklahoma / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 699
The Storm Prediction Center issued this severe thunderstorm watch at Sep 30, 2007, 2:51 PM CDT for 6 counties in Arkansas; 4 counties in Missouri; 21 counties in Oklahoma. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 30, 2007, 2:51 PM CDT (19:51 UTC)
- Expired
- Sep 30, 2007, 9:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 31 counties
Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Washington County, AR, Barry County, MO, McDonald County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Kay County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 31 km from the middle of the area, began a volume at 19:51 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
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 6:43 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Ottawa | 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
Springfield, MO (KSGF), launched 12:00Z, 7.9 hours before the alert went out and 177 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1555 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 331 m²/s²
- 0-3 km storm-relative helicity
- 297 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 |
|---|---|---|---|---|
| Sep 30, 2:23 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Madison, Washington | 67 min |
| Sep 30, 6:13 PM CDT | Mesoscale Discussion | SPC | Benton | 92 min |
| Sep 30, 12:10 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Bates, Buchanan, Cass, Clay and 9 more | 65 min |
| Sep 30, 12:37 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Atchison, Barton, Bates, Benton and 47 more | 7 hr |
| Sep 30, 2:26 PM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Bates, Buchanan, Caldwell, Carroll and 24 more | 64 min |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2007Severe Thunderstorm Watches in Arkansas, 2007Severe Thunderstorm Watches in Missouri, 2007Every severe thunderstorm watch in 2007
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.