Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 370
The Storm Prediction Center issued this mesoscale discussion at Apr 18, 2015, 8:24 PM CDT for 31 counties in Texas. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Apr 18, 2015, 8:24 PM CDT (01:24 UTC)
- Expired
- Apr 18, 2015, 10:00 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 31 counties
Anderson County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Collin County, TX, Comal County, TX, Dallas County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Freestone County, TX, Hays County, TX, Henderson County, TX, Hunt County, TX, Kaufman County, TX, Kendall County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Navarro County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Travis County, TX, Van Zandt County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 80 km from the middle of the area, began a volume at 01:23 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 nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 1.4 hours before the alert went out and 156 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
- 996 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1518 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 7:46 PM CDT | Mesoscale Discussion | SPC | Childress, Cottle, Foard, Hardeman, Wichita, Wilbarger | 89 min |
| Apr 19, 12:43 PM CDT | Mesoscale Discussion | SPC | Bowie, Fannin, Lamar, Red River | 2 hr |
| Apr 19, 1:52 PM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Bowie, Brazoria, Brazos, Burleson and 44 more | 53 min |
| Apr 19, 2:31 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Austin, Bastrop, Bowie, Brazoria, Brazos and 37 more | 7 hr |
| Apr 19, 4:45 PM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 35 more | 2 hr |
| Apr 19, 5:46 PM CDT | Tornado Watch | SPC | Angelina, Nacogdoches, Panola, Sabine, San Augustine, Shelby | 6 hr |
| Apr 19, 6:56 PM CDT | Mesoscale Discussion | SPC | Austin, Chambers, Colorado, Fort Bend, Galveston, Harris and 5 more | 64 min |
Nearby
Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015
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.