Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 425
The Storm Prediction Center issued this mesoscale discussion at Apr 21, 2020, 1:17 PM MDT for 4 states. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Apr 21, 2020, 1:17 PM MDT (19:17 UTC)
- Expired
- Apr 21, 2020, 2:15 PM MDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 24 counties
Las Animas County, CO, Harding County, NM, Union County, NM, Cimarron County, OK, Texas County, OK, Armstrong County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Dallam County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 150 km from the middle of the area, began a volume at 19:17 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
Dodge City, (KDDC), launched 12:00Z, 7.3 hours before the alert went out and 291 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
- 2524 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 21, 2:11 PM MDT | Severe Thunderstorm Watch | SPC | Beaver, Cimarron, Texas | 6 hr |
| Apr 21, 4:27 PM MDT | Mesoscale Discussion | SPC | Beaver, Beckham, Cimarron, Ellis, Greer, Harmon and 2 more | 93 min |
| Apr 21, 5:17 PM MDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 13 more | 58 min |
| Apr 21, 5:50 PM MDT | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 23 more | 7 hr |
| Apr 21, 5:25 PM MDT | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Concho, Eastland, Fisher and 5 more | 95 min |
Nearby
Mesoscale Discussions in Texas, 2020Mesoscale Discussions in New Mexico, 2020Mesoscale Discussions in Oklahoma, 2020Every mesoscale discussion in 2020
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.