Alert archive / Texas / Mesoscale Discussions in 2019
Mesoscale Discussion 604
The Storm Prediction Center issued this mesoscale discussion at May 9, 2019, 5:40 PM CDT for 24 counties in Texas. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- May 9, 2019, 5:40 PM CDT (22:40 UTC)
- Expired
- May 9, 2019, 7:15 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 24 counties
Austin County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Lavaca 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, Victoria County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 51 km from the middle of the area, began a volume at 22:42 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.7 hours before the alert went out and 241 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
- 1902 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 689 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 8.0
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 |
|---|---|---|---|---|
| May 8, 7:32 PM CDT | Mesoscale Discussion | SPC | Bailey, Castro, Deaf Smith, Hale, Lamb, Parmer and 1 more | 58 min |
| May 8, 10:31 PM CDT | Mesoscale Discussion | SPC | Angelina, Brazos, Cherokee, Fort Bend, Grimes, Hardin and 21 more | 89 min |
| May 9, 1:01 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bee, Bexar, Comal, Dimmit and 20 more | 119 min |
| May 9, 2:25 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bee, Bexar, Blanco and 33 more | 11 hr |
| May 9, 6:31 PM CDT | Severe Thunderstorm Watch | SPC | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 15 more | 8 hr |
Nearby
Mesoscale Discussions in Texas, 2019Every mesoscale discussion in 2019
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.