Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 1761
The Storm Prediction Center issued this mesoscale discussion at Aug 14, 2012, 5:42 PM CDT for 16 counties in Oklahoma; 25 counties in Texas. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Aug 14, 2012, 5:42 PM CDT (22:42 UTC)
- Expired
- Aug 14, 2012, 6:45 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 41 counties
Beckham County, OK, Carter County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Childress County, TX, Clay County, TX, Collin County, TX, Collingsworth County, TX, Cooke County, TX, Cottle County, TX, Denton County, TX, Fannin County, TX, Foard County, TX, Grayson County, TX, Hall County, TX, Hardeman County, TX, Hunt County, TX, Jack County, TX, Knox County, TX, Montague County, TX, Rockwall County, TX, Tarrant County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX
The radar
The Altus AFB radar (KFDR), 55 km from the middle of the area, began a volume at 22:42 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
Norman, OK (KOUN), launched 12:00Z, 10.7 hours before the alert went out and 145 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
- 1660 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 240 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 |
|---|---|---|---|---|
| Aug 14, 2:10 PM CDT | Mesoscale Discussion | SPC | Harmon, Jackson | 2 hr |
| Aug 14, 6:04 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Beckham, Bryan, Caddo, Carter, Choctaw and 18 more | 5 hr |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Oklahoma, 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.