Alert archive / Oklahoma / Mesoscale Discussions in 2011
Mesoscale Discussion 371
The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2011, 2:26 PM CDT for Chautauqua County, Cowley County, Sumner County, Kansas; 21 counties in Oklahoma. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2011, 2:26 PM CDT (19:26 UTC)
- Expired
- Apr 8, 2011, 4:00 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 24 counties
Chautauqua County, KS, Cowley County, KS, Sumner County, KS, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Washington County, OK, Washita County, OK
The radar
The Norman radar (KTLX), 78 km from the middle of the area, began a volume at 19:27 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Lamont, OK (KLMN), launched 12:00Z, 7.4 hours before the alert went out and 69 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
- 2243 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 10:55 PM CDT | Mesoscale Discussion | SPC | Anderson, Chase, Coffey, Douglas, Franklin, Johnson and 5 more | 95 min |
| Apr 8, 5:35 PM CDT | Tornado Watch | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Coffey and 15 more | 9 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Kansas, 2011Every mesoscale discussion 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.