Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 572
The Storm Prediction Center issued this mesoscale discussion at Apr 20, 2012, 1:30 PM CDT for 13 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 20, 2012, 1:30 PM CDT (18:30 UTC)
- Expired
- Apr 20, 2012, 3:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, Nueces County, TX, Starr County, TX, Webb County, TX, Willacy County, TX, Zapata County, TX
The radar
The Corpus Christi radar (KCRP), 141 km from the middle of the area, began a volume at 18:32 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
Corpus Christi, TX (KCRP), launched 12:00Z, 6.5 hours before the alert went out and 149 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
- 633 J/kg
- Mixed-layer CIN
- -475 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 19, 9:13 PM CDT | Mesoscale Discussion | SPC | Cooke, Denton, Grayson, Jack, Montague, Wise | 62 min |
| Apr 19, 10:49 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Cooke, Foard, Hardeman and 7 more | 116 min |
| Apr 20, 12:35 PM CDT | Mesoscale Discussion | SPC | Angelina, Aransas, Austin, Bee, Brazoria, Calhoun and 33 more | 2 hr |
| Apr 20, 12:57 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Austin, Bastrop, Bee, Brazoria, Brazos and 43 more | 7 hr |
| Apr 20, 2:29 PM CDT | Severe Thunderstorm Watch | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 10 more | 5 hr |
| Apr 20, 3:44 PM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Brazoria, Brazos, Burleson, Chambers and 27 more | 91 min |
| Apr 20, 4:48 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Kenedy, Kleberg, Nueces and 2 more | 57 min |
| Apr 20, 6:12 PM CDT | Mesoscale Discussion | SPC | Aransas, Brazoria, Calhoun, Chambers, Fort Bend, Galveston and 18 more | 93 min |
Nearby
Mesoscale Discussions in Texas, 2012Every mesoscale discussion in 2012
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.