Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 1884
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2011, 2:21 PM CDT for 6 counties in Kansas; 11 counties in Oklahoma; 22 counties in Texas. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2011, 2:21 PM CDT (19:21 UTC)
- Expired
- Aug 7, 2011, 4:15 PM CDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 39 counties
Clark County, KS, Comanche County, KS, Haskell County, KS, Meade County, KS, Seward County, KS, Stevens County, KS, Beaver County, OK, Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Texas County, OK, Washita County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 143 km from the middle of the area, began a volume at 19:21 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, 7.4 hours before the alert went out and 142 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
- 2 J/kg
- Mixed-layer CIN
- -284 J/kg
- Mixed-layer LCL
- 2741 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 151 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 7, 10:48 AM CDT | Mesoscale Discussion | SPC | Anderson, Atchison, Barton, Chase, Clay, Cloud and 33 more | 117 min |
| Aug 7, 12:55 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Douglas, Jackson, Jefferson, Johnson, Leavenworth and 6 more | 5 hr |
| Aug 7, 3:16 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Coffey, Crawford, Douglas and 7 more | 119 min |
| Aug 7, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | Bourbon, Crawford | 6 hr |
| Aug 7, 5:20 PM CDT | Mesoscale Discussion | SPC | Allen, Bourbon, Cherokee, Crawford, Labette, Montgomery and 3 more | 115 min |
| Aug 7, 6:07 PM CDT | Severe Thunderstorm Watch | SPC | Chautauqua, Cherokee, Elk, Labette, Montgomery, Neosho and 1 more | 5 hr |
| Aug 7, 1:46 PM CDT | Mesoscale Discussion | SPC | McCurtain | 119 min |
Nearby
Mesoscale Discussions in Texas, 2011Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Kansas, 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.