Alert archive / Oklahoma / Mesoscale Discussions in 2011
Mesoscale Discussion 1327
The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2011, 5:35 PM CDT for 25 counties in Oklahoma; 14 counties in Texas. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2011, 5:35 PM CDT (22:35 UTC)
- Expired
- Jun 20, 2011, 7:00 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 39 counties
Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Clay County, TX, Jack County, TX, Montague County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wise County, TX, Young County, TX
The radar
The Norman radar (KTLX), 77 km from the middle of the area, began a volume at 22:34 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 nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 10.6 hours before the alert went out and 61 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
- 1692 J/kg
- Mixed-layer CIN
- -552 J/kg
- Mixed-layer LCL
- 1064 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 367 m²/s²
- 0-3 km storm-relative helicity
- 400 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
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 |
|---|---|---|---|---|
| Jun 20, 10:42 AM CDT | Mesoscale Discussion | SPC | Cleveland, Creek, Kay, Lincoln, Logan, McClain and 13 more | 63 min |
| Jun 20, 1:34 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Canadian, Garfield, Grant, Kay, Kingfisher and 7 more | 116 min |
| Jun 20, 3:21 PM CDT | Mesoscale Discussion | SPC | Canadian, Carter, Cleveland, Coal, Comanche, Cotton and 27 more | 84 min |
| Jun 20, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 26 more | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Texas, 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.