Alert archive / Oklahoma / Mesoscale Discussions in 2012
Mesoscale Discussion 1989
The Storm Prediction Center issued this mesoscale discussion at Sep 25, 2012, 9:33 PM CDT for 24 counties in Oklahoma; 8 counties in Texas. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Sep 25, 2012, 9:33 PM CDT (02:33 UTC)
- Expired
- Sep 25, 2012, 11:00 PM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 32 counties
Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Noble County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 51 km from the middle of the area, began a volume at 02:32 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 00:00Z, 2.6 hours before the alert went out and 147 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
- 620 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 2770 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
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 |
|---|---|---|---|---|
| Sep 25, 7:29 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 23 more | 4 hr |
| Sep 26, 1:50 PM CDT | Mesoscale Discussion | SPC | Cimarron, Texas | 55 min |
| Sep 26, 2:04 PM CDT | Mesoscale Discussion | SPC | Cleveland, Haskell, Hughes, Latimer, LeFlore, Lincoln and 7 more | 86 min |
| Sep 26, 2:17 PM CDT | Severe Thunderstorm Watch | SPC | Haskell, Hughes, Latimer, LeFlore, Lincoln, McIntosh and 7 more | 8 hr |
| Sep 26, 3:59 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Cimarron, Texas | 7 hr |
| Sep 26, 2:55 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Crane, Crosby, Dawson, Ector and 18 more | 65 min |
| Sep 26, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | Borden, Briscoe, Castro, Childress, Cottle, Crosby and 20 more | 5 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Texas, 2012Every mesoscale discussion in 2012
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.