Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 133
The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2018, 2:33 PM CDT for 5 counties in Oklahoma; 33 counties in Texas. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Mar 18, 2018, 2:33 PM CDT (19:33 UTC)
- Expired
- Mar 18, 2018, 4:30 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 38 counties
Carter County, OK, Cotton County, OK, Jefferson County, OK, Love County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Comanche County, TX, Cooke County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Hamilton County, TX, Haskell County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Knox County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 88 km from the middle of the area, began a volume at 19:35 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, 7.6 hours before the alert went out and 109 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
- 177 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 537 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 63 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 |
|---|---|---|---|---|
| Mar 18, 6:27 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Ellis, Roger Mills | 3 hr |
| Mar 17, 8:35 PM CDT | Mesoscale Discussion | SPC | Bell, Brazos, Falls, Houston, Leon, Madison and 2 more | 55 min |
| Mar 18, 3:31 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Austin, Bastrop, Bell, Brazos and 29 more | 119 min |
| Mar 18, 4:06 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Angelina, Austin, Bastrop, Bell, Bosque and 68 more | 6 hr |
| Mar 18, 5:30 PM CDT | Mesoscale Discussion | SPC | Austin, Bastrop, Caldwell, Colorado, Fayette, Travis and 2 more | 2 hr |
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.