Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 151
The Storm Prediction Center issued this mesoscale discussion at Mar 4, 2020, 2:03 AM CST for 17 counties in Texas. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Mar 4, 2020, 2:03 AM CST (08:03 UTC)
- Expired
- Mar 4, 2020, 4:00 AM CST
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
Counties Bandera County, TX, Edwards County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, Medina County, TX, Menard County, TX, Real County, TX, San Saba County, TX, Uvalde County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 93 km from the middle of the area, began a volume at 08:02 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
Del Rio, TX (KDRT), launched 00:00Z, 8.1 hours before the alert went out and 127 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
- 277 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1090 m above ground
- 0-6 km bulk shear
- 93 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 294 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
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 3, 9:05 PM CST | Mesoscale Discussion | SPC | Bandera, Bastrop, Bell, Blanco, Burleson, Burnet and 23 more | 2 hr |
| Mar 4, 1:19 AM CST | Mesoscale Discussion | SPC | Angelina, Jasper, Nacogdoches, Newton, Panola, Sabine and 3 more | 2 hr |
| Mar 4, 2:28 AM CST | Severe Thunderstorm Watch | SPC | Bandera, Bexar, Blanco, Burnet, Comal, Edwards and 13 more | 6 hr |
| Mar 4, 4:20 AM CST | Mesoscale Discussion | SPC | Anderson, Angelina, Bastrop, Bell, Blanco, Brazos and 41 more | 115 min |
| Mar 4, 5:02 AM CST | Severe Thunderstorm Watch | SPC | Angelina, Cherokee, Jasper, Nacogdoches, Newton, Panola and 5 more | 7 hr |
| Mar 4, 7:33 AM CST | Severe Thunderstorm Watch | SPC | Anderson, Brazos, Burleson, Falls, Freestone, Grimes and 10 more | 4 hr |
| Mar 4, 10:50 AM CST | Mesoscale Discussion | SPC | Angelina, Houston, Jasper, Nacogdoches, Newton, Polk and 5 more | 115 min |
Nearby
Mesoscale Discussions in Texas, 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.