Alert archive / Texas / Mesoscale Discussions in 2016
Mesoscale Discussion 613
The Storm Prediction Center issued this mesoscale discussion at May 11, 2016, 9:52 PM CDT for 21 counties in Texas. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- May 11, 2016, 9:52 PM CDT (02:52 UTC)
- Expired
- May 11, 2016, 10:45 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 21 counties
Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Eastland County, TX, Erath County, TX, Fisher County, TX, Haskell County, TX, Hood County, TX, Jack County, TX, Jones County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 32 km from the middle of the area, began a volume at 02:51 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
Fort Worth, TX (KFWD), launched 00:00Z, 2.9 hours before the alert went out and 158 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
- 2369 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1270 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.1
The text
As transmitted.
533
ACUS11 KWNS 120253
SWOMCD
SPC MCD 120252
TXZ000-120345-
MESOSCALE DISCUSSION 0613
NWS STORM PREDICTION CENTER NORMAN OK
0952 PM CDT WED MAY 11 2016
AREAS AFFECTED...PORTIONS OF N TX
CONCERNING...SEVERE THUNDERSTORM WATCH 170...
VALID 120252Z - 120345Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 170
CONTINUES.
SUMMARY...THE RISK FOR SVR TSTMS WITH LARGE HAIL AND DMGG WINDS
CONTINUES ACROSS WW 170.
DISCUSSION...TSTM CLUSTERS FROM MINERAL WELLS TO COLEMAN TX CONTINUE
SPREADING EWD/SWD WITH CONVECTIVE BACKBUILDING TAKING PLACE UPSTREAM
ACROSS THE LOW ROLLING PLAINS. MODEST INCREASES IN MLCINH E OF THE
AFOREMENTIONED CONVECTION MAY MARGINALIZE THE SVR RISK ACROSS PARTS
OF N-CNTRL TX...THOUGH AMPLE BUOYANCY SAMPLED BY THE 00Z FWD RAOB
SUGGESTS SVR HAIL/WIND MAY PERSIST WITH THIS ACTIVITY TOWARD W SIDES
OF THE DFW METROPLEX AND VICINITY. LARGE-SCALE ASCENT AHEAD OF A
MID-LEVEL TROUGH WILL SUPPORT CONVECTIVE BACKBUILDING INTO THE
OVERNIGHT HOURS ACROSS PARTS OF NW TX. WW 170 IS PRESENTLY SCHEDULED
TO EXPIRE AT 04Z. HOWEVER...SOME SVR RISK MAY CONTINUE LATER INTO
THE OVERNIGHT HOURS AS MODERATELY TO STRONGLY UNSTABLE INFLOW EXISTS
AMIDST MODERATE DEEP SHEAR...POTENTIALLY WARRANTING EXTENSION OF THE
WW IN TIME OR A NEW WW.
..COHEN.. 05/12/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FWD...SJT...LUB...
LAT...LON 31659924 32080011 32670052 33299999 33289847 33289726
32479720 31889828 31659924SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 7:11 PM CDT | Mesoscale Discussion | SPC | Callahan, Eastland, Erath, Fisher, Haskell, Hood and 13 more | 94 min |
| May 11, 8:11 PM CDT | Mesoscale Discussion | SPC | Clay, Cooke, Grayson, Montague | 3 hr |
| May 11, 10:13 PM CDT | Mesoscale Discussion | SPC | Armstrong, Childress, Collingsworth, Donley, Gray, Hall and 4 more | 92 min |
| May 11, 10:55 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Callahan, Coke, Coleman, Fisher, Jones and 4 more | 6 hr |
| May 12, 2:12 AM CDT | Mesoscale Discussion | SPC | Clay, Montague, Wichita | 93 min |
| May 12, 3:35 AM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Eastland, Erath and 9 more | 85 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.