Alert archive / Texas / Mesoscale Discussions in 2016
Mesoscale Discussion 376
The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2016, 11:06 PM CDT for 13 counties in Texas. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2016, 11:06 PM CDT (04:06 UTC)
- Expired
- Apr 13, 2016, 1:00 AM CDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
Counties Austin County, TX, Brazoria County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Harris County, TX, Jackson County, TX, Lavaca County, TX, Matagorda County, TX, Victoria County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 121 km from the middle of the area, began a volume at 04:06 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 00:00Z, 4.1 hours before the alert went out and 208 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
- 634 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 912 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
018
ACUS11 KWNS 130406
SWOMCD
SPC MCD 130406
TXZ000-130600-
MESOSCALE DISCUSSION 0376
NWS STORM PREDICTION CENTER NORMAN OK
1106 PM CDT TUE APR 12 2016
AREAS AFFECTED...SCNTRL AND SE TX
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 130406Z - 130600Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...A SEVERE THREAT IS LIKELY TO CONTINUE...MOVING EWD FROM
SCNTRL TX INTO SE TX OVER THE NEXT FEW HOURS. WIND DAMAGE AND HAIL
WILL BE THE PRIMARY THREATS. WW ISSUANCE WILL LIKELY BE NEEDED
WITHIN THE HOUR.
DISCUSSION...LATEST SFC ANALYSIS SHOWS A QUASI-STATIONARY FRONT
LOCATED FROM SCNTRL TX EXTENDING ENEWD ACROSS SE TX. A
MULTI-SEGMENTED LINE WITH A BOWING STRUCTURE AND EMBEDDED SUPERCELL
IS LOCATED TO THE ENE OF SAN ANTONIO. THIS LINE WILL CONTINUE TO
MOVE EWD INTO SE TX OVER THE NEXT FEW HOURS...REMAINING PARALLEL TO
THE FRONT NEAR AND ON THE COOL SIDE OF THE BOUNDARY. ALTHOUGH
INSTABILITY IS WEAK IN THE HOUSTON AREA...THE LATEST HGX WSR-88D VWP
SHOWS 65 TO 70 KT OF 0-6 KM SHEAR WITH SUBSTANTIAL DIRECTIONAL SHEAR
FROM 0 TO 3 KM AGL. THIS WIND PROFILE WILL BE FAVORABLE FOR BOWING
LINE SEGMENTS WITH WIND DAMAGE AND POSSIBLY SUPERCELL STRUCTURES.
THE STRONG DEEP-LAYER SHEAR COMBINED WITH MODESTLY STEEP LAPSE RATES
MAY ALSO BE ENOUGH FOR HAIL WITH THE MORE INTENSE CORES.
..BROYLES/THOMPSON.. 04/13/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...HGX...CRP...EWX...
LAT...LON 28739577 28589733 29079751 29699735 30119672 30319542
29729468 28739577SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 7:26 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Caldwell, Comal and 17 more | 3 hr |
| Apr 12, 7:45 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bee, Bexar, Blanco, Caldwell and 26 more | 5 hr |
| Apr 12, 9:43 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bee, Bexar, Blanco, Caldwell and 25 more | 92 min |
| Apr 12, 11:26 PM CDT | Severe Thunderstorm Watch | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 5 more | 6 hr |
| Apr 13, 2:01 AM CDT | Mesoscale Discussion | SPC | Brazoria, Chambers, Fort Bend, Galveston, Harris, Jackson and 3 more | 119 min |
Nearby
Mesoscale Discussions in Texas, 2016Every mesoscale discussion in 2016
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.