Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 2347
The Storm Prediction Center issued this mesoscale discussion at Nov 21, 2011, 9:03 AM CST for 14 counties in Oklahoma; 42 counties in Texas. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Nov 21, 2011, 9:03 AM CST (15:03 UTC)
- Expired
- Nov 21, 2011, 10:00 AM CST
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 56 counties
Beckham County, OK, Caddo County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Kiowa County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Borden County, TX, Briscoe County, TX, Childress County, TX, Clay County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Lynn County, TX, Mitchell County, TX, Montague County, TX, Motley County, TX, Nolan County, TX, Palo Pinto County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Swisher County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX
The radar
The Altus AFB radar (KFDR), 101 km from the middle of the area, began a volume at 15:05 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 3.1 hours before the alert went out and 242 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
- 1625 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 83 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 |
|---|---|---|---|---|
| Nov 20, 8:02 PM CST | Mesoscale Discussion | SPC | Choctaw, LeFlore, McCurtain, Pushmataha | 58 min |
| Nov 21, 3:44 PM CST | Mesoscale Discussion | SPC | Atoka, Beckham, Bryan, Caddo, Canadian, Carter and 33 more | 91 min |
| Nov 21, 3:46 PM CST | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Camp, Cass, Cherokee and 37 more | 119 min |
Nearby
Mesoscale Discussions in Texas, 2011Mesoscale Discussions in Oklahoma, 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.