Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 299
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2018, 7:13 PM CDT for 6 counties in Oklahoma; 44 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2018, 7:13 PM CDT (00:13 UTC)
- Expired
- Apr 30, 2018, 9:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 50 counties
Beaver County, OK, Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Roger Mills County, OK, Andrews County, TX, Armstrong County, TX, Borden County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crane County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Ector County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Hockley County, TX, Howard County, TX, Kent County, TX, King County, TX, Lipscomb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Ochiltree County, TX, Pecos County, TX, Reagan County, TX, Roberts County, TX, Scurry County, TX, Swisher County, TX, Terry County, TX, Upton County, TX, Wheeler County, TX, Yoakum County, TX
The radar
The Lubbock radar (KLBB), 82 km from the middle of the area, began a volume at 00:14 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
Midland Regional, TX (KMAF), launched 00:00Z, 0.2 hours before the alert went out and 157 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
- 1009 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 2007 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- -45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 10:07 PM CDT | Mesoscale Discussion | SPC | Beaver | 53 min |
| May 1, 5:07 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Custer, Dewey, Ellis, Harper, Major and 3 more | 83 min |
Nearby
Mesoscale Discussions in Texas, 2018Mesoscale Discussions in Oklahoma, 2018Every mesoscale discussion in 2018
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.