Alert archive / Texas / Mesoscale Discussions in 2019
Mesoscale Discussion 515
The Storm Prediction Center issued this mesoscale discussion at May 3, 2019, 12:20 PM CDT for Fort Bend County, Harris County, Waller County, Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 3, 2019, 12:20 PM CDT (17:20 UTC)
- Expired
- May 3, 2019, 2:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
Counties Fort Bend County, TX, Harris County, TX, Waller County, TX
The radar
The Houston radar (KHGX), 56 km from the middle of the area, began a volume at 17:20 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 12:00Z, 5.3 hours before the alert went out and 230 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
- 859 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 745 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
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 2, 10:26 PM CDT | Mesoscale Discussion | SPC | Brewster, Dimmit, Kinney, Maverick, Terrell, Val Verde and 2 more | 2 hr |
| May 3, 5:45 AM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Kleberg and 3 more | 60 min |
| May 3, 6:13 AM CDT | Severe Thunderstorm Watch | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 8 more | 5 hr |
| May 3, 7:39 AM CDT | Mesoscale Discussion | SPC | Colorado, DeWitt, Fayette, Lavaca | 66 min |
| May 3, 9:59 AM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Wells, Kenedy and 4 more | 16 min |
| May 3, 1:26 PM CDT | Mesoscale Discussion | SPC | Andrews, Bailey, Brewster, Cochran, Crane, Dawson and 15 more | 3 hr |
| May 3, 3:26 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Bailey, Borden, Brewster, Castro, Cochran and 25 more | 6 hr |
| May 3, 4:23 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 16 more | 67 min |
| May 3, 4:35 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 31 more | 6 hr |
| May 3, 5:58 PM CDT | Mesoscale Discussion | SPC | Andrews, Bailey, Cochran, Crane, Dawson, Ector and 10 more | 92 min |
| May 3, 6:48 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Caldwell and 16 more | 57 min |
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.