Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 134
The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2018, 3:31 PM CDT for 35 counties in Texas. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Mar 18, 2018, 3:31 PM CDT (20:31 UTC)
- Expired
- Mar 18, 2018, 5:30 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 35 counties
Anderson County, TX, Angelina County, TX, Austin County, TX, Bastrop County, TX, Bell County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Cherokee County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Grimes County, TX, Hays County, TX, Henderson County, TX, Houston County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Navarro County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, San Jacinto County, TX, Travis County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 106 km from the middle of the area, began a volume at 20:31 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, 8.5 hours before the alert went out and 226 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 17, 8:35 PM CDT | Mesoscale Discussion | SPC | Bell, Brazos, Falls, Houston, Leon, Madison and 2 more | 55 min |
| Mar 18, 2:33 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Bosque, Brown, Callahan, Clay and 27 more | 117 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 |
| Mar 18, 6:27 PM CDT | Mesoscale Discussion | SPC | Hemphill, Lipscomb, Wheeler | 3 hr |
Nearby
Mesoscale Discussions in Texas, 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.