Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 194
The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2018, 8:28 PM CDT for 6 parishes in Louisiana; 23 counties in Texas. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Mar 28, 2018, 8:28 PM CDT (01:28 UTC)
- Expired
- Mar 28, 2018, 9:30 PM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 29 counties
Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Evangeline Parish, LA, Rapides Parish, LA, Vernon Parish, LA, Austin County, TX, Brazoria County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 91 km from the middle of the area, began a volume at 01:28 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
Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.5 hours before the alert went out and 140 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
- 1263 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 604 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 9.7
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 29, 3:17 AM CDT | Mesoscale Discussion | SPC | Calcasieu, Cameron | 58 min |
| Mar 28, 7:36 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bastrop, Bee, Bexar, Brooks and 29 more | 7 hr |
| Mar 28, 11:43 PM CDT | Mesoscale Discussion | SPC | Aransas, Bee, Brazoria, Brooks, Calhoun, Goliad and 13 more | 92 min |
Nearby
Mesoscale Discussions in Texas, 2018Mesoscale Discussions in Louisiana, 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.