Alert archive / Texas / Mesoscale Discussions in 2019
Mesoscale Discussion 481
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2019, 2:06 PM CDT for 23 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2019, 2:06 PM CDT (19:06 UTC)
- Expired
- Apr 30, 2019, 4:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 23 counties
Bailey County, TX, Borden County, TX, Cochran County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Floyd County, TX, Foard County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Haskell County, TX, Hockley County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Scurry County, TX, Stonewall County, TX, Terry County, TX, Yoakum County, TX
The radar
The Lubbock radar (KLBB), 29 km from the middle of the area, began a volume at 19:07 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 7.1 hours before the alert went out and 184 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
- 545 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 218 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 29, 7:01 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Borden, Dawson, Ector, Gaines, Howard and 7 more | 3 hr |
| Apr 29, 9:35 PM CDT | Mesoscale Discussion | SPC | Ector, Loving, Winkler | 115 min |
| Apr 30, 1:53 PM CDT | Mesoscale Discussion | SPC | Archer, Bosque, Brown, Callahan, Clay, Coleman and 28 more | 2 hr |
| Apr 30, 2:19 PM CDT | Tornado Watch | SPC | Archer, Baylor, Bosque, Clay, Collin, Comanche and 24 more | 9 hr |
| Apr 30, 2:56 PM CDT | Mesoscale Discussion | SPC | Baylor, Wilbarger | 2 hr |
| Apr 30, 4:26 PM CDT | Severe Thunderstorm Watch | SPC | Borden, Briscoe, Brown, Callahan, Childress, Coke and 44 more | 8 hr |
| Apr 30, 5:21 PM CDT | Mesoscale Discussion | SPC | Archer, Bosque, Clay, Collin, Comanche, Cooke and 19 more | 84 min |
| Apr 30, 6:47 PM CDT | Mesoscale Discussion | SPC | Borden, Coke, Cottle, Crane, Crockett, Crosby and 36 more | 118 min |
Nearby
Mesoscale Discussions in Texas, 2019Every mesoscale discussion in 2019
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.