Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 193
The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2020, 2:49 PM CDT for Jefferson County, Oklahoma; 35 counties in Texas. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Mar 18, 2020, 2:49 PM CDT (19:49 UTC)
- Expired
- Mar 18, 2020, 4:45 PM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 36 counties
Jefferson County, OK, Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Eastland County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Irion County, TX, Jack County, TX, Jones County, TX, King County, TX, Knox County, TX, McCulloch County, TX, Mitchell County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 34 km from the middle of the area, began a volume at 19:53 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
Fort Worth, TX (KFWD), launched 12:00Z, 7.8 hours before the alert went out and 202 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
- 54 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 823 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Mar 18, 4:42 PM CDT | Tornado Watch | SPC | Beckham, Caddo, Carter, Comanche, Cotton, Greer and 8 more | 7 hr |
| Mar 18, 6:48 PM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more | 117 min |
| Mar 17, 7:48 PM CDT | Mesoscale Discussion | SPC | Coke, Concho, Crockett, Fisher, Haskell, Irion and 10 more | 117 min |
| Mar 17, 11:11 PM CDT | Mesoscale Discussion | SPC | Archer, Brown, Callahan, Coke, Coleman, Comanche and 22 more | 34 min |
| Mar 18, 2:07 AM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Comanche, Dallas, Eastland, Ellis and 13 more | 113 min |
| Mar 18, 5:37 PM CDT | Mesoscale Discussion | SPC | Jones, Shackelford, Stephens, Throckmorton, Young | 113 min |
Nearby
Mesoscale Discussions in Texas, 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.