Alert archive / Oklahoma / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 512
The Storm Prediction Center issued this severe thunderstorm watch at Jul 12, 2007, 5:46 AM CDT for 29 counties in Oklahoma. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 12, 2007, 5:46 AM CDT (10:46 UTC)
- Expired
- Jul 12, 2007, 11:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 29 counties
Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Hughes County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Washita County, OK, Woodward County, OK
The radar
The Norman radar (KTLX), 80 km from the middle of the area, began a volume at 10:47 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
- 5%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- 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
- 70%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 5:59 AM CDT | Severe Thunderstorm Warning | OUN | Major | 31 min |
| Jul 12, 7:01 AM CDT | Severe Thunderstorm Warning | OUN | Blaine, Custer, Dewey | 44 min |
| Jul 12, 7:27 AM CDT | Flash Flood Warning | TSA | Osage | 6 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 10.8 hours before the alert went out and 90 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
- 1675 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 10:17 PM CDT | Mesoscale Discussion | SPC | Cimarron, Texas | 88 min |
| Jul 12, 5:34 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Custer and 15 more | 2 hr |
| Jul 12, 7:47 AM CDT | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Cleveland, Creek, Custer and 21 more | 118 min |
| Jul 12, 10:39 AM CDT | Mesoscale Discussion | SPC | Atoka, Carter, Coal, Haskell, Johnston, Latimer and 7 more | 66 min |
| Jul 12, 3:41 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Ellis, Greer, Harmon, Harper and 4 more | 2 hr |
| Jul 12, 5:54 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Cimarron, Ellis, Harper, Texas, Woods and 1 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Oklahoma, 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.