Alert archive / Texas / Mesoscale Discussions in 2009
Mesoscale Discussion 82
The Storm Prediction Center issued this mesoscale discussion at Feb 10, 2009, 12:17 PM CST for 26 counties in Oklahoma; 38 counties in Texas. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Feb 10, 2009, 12:17 PM CST (18:17 UTC)
- Expired
- Feb 10, 2009, 2:15 PM CST
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 64 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Cotton County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Archer County, TX, Baylor County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Grayson County, TX, Hamilton County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, McCulloch County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, San Saba County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wise County, TX, Young County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 119 km from the middle of the area, began a volume at 18:19 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
Fort Worth, TX (KFWD), launched 12:00Z, 6.3 hours before the alert went out and 102 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
- 235 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.6
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 |
|---|---|---|---|---|
| Feb 10, 12:49 PM CST | Tornado Watch | SPC | Blaine, Caddo, Canadian, Carter, Cleveland, Comanche and 19 more | 9 hr |
| Feb 10, 1:29 PM CST | Mesoscale Discussion | SPC | Kay, Noble, Nowata, Osage, Pawnee, Washington | 2 hr |
| Feb 10, 2:16 PM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Coal, Haskell, Hughes and 12 more | 119 min |
| Feb 10, 2:33 PM CST | Mesoscale Discussion | SPC | Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 13 more | 87 min |
| Feb 10, 2:42 PM CST | Tornado Watch | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 29 more | 7 hr |
| Feb 10, 3:37 PM CST | Tornado Watch | SPC | McCurtain | 6 hr |
| Feb 10, 5:25 PM CST | Mesoscale Discussion | SPC | McCurtain | 65 min |
| Feb 10, 3:45 PM CST | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Concho, Eastland and 16 more | 90 min |
Nearby
Mesoscale Discussions in Texas, 2009Mesoscale Discussions in Oklahoma, 2009Every mesoscale discussion in 2009
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.