Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 724
The Storm Prediction Center issued this mesoscale discussion at May 5, 2012, 8:22 PM CDT for 17 counties in Texas. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- May 5, 2012, 8:22 PM CDT (01:22 UTC)
- Expired
- May 5, 2012, 9:15 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
Counties Blanco County, TX, Brown County, TX, Burnet County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Gillespie County, TX, Hamilton County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, San Saba County, TX
The radar
The Ft Hood radar (KGRK), 150 km from the middle of the area, began a volume at 01:22 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
Fort Worth, TX (KFWD), launched 00:00Z, 1.4 hours before the alert went out and 243 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
- 3437 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1465 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.0
The text
As transmitted, in the capitals the NWS used until 2016.
721
ACUS11 KWNS 060122
SWOMCD
SPC MCD 060122
TXZ000-060215-
MESOSCALE DISCUSSION 0724
NWS STORM PREDICTION CENTER NORMAN OK
0822 PM CDT SAT MAY 05 2012
AREAS AFFECTED...CNTRL TX
CONCERNING...SEVERE THUNDERSTORM WATCH 250...
VALID 060122Z - 060215Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 250
CONTINUES.
SUMMARY...A SLOW MOVING CLUSTER OF STRONG TO SEVERE THUNDERSTORMS
MAY GRADUALLY MEANDER EWD. LARGE HAIL AND DMGG WINDS REMAIN POSSIBLE
ACROSS THE WW AREA.
DISCUSSION...A CLUSTER OF THUNDERSTORMS APPEARS TO BE THRIVING
AMIDST EXTREME INSTABILITY...AND A WARM/MOIST SELY INFLOW.
OCCASIONAL REDEVELOPMENT HAS BEEN NOTED AS VARIOUS OUTFLOW
BOUNDARIES ALLOW FOR GREATER LOW LEVEL FOCUS FOR UPWARD MOTION. VERY
WEAK EFFECTIVE SHEAR NOTED ON 00Z DRT AND DFW SOUNDINGS WILL
CONTINUE TO LEAD TO A DISORGANIZED NATURE OF THE ONGOING STORMS. A
GRADUAL STABILIZATION OF THE BOUNDARY LAYER OWING TO DIURNAL COOLING
SHOULD SUPPORT EVENTUAL WEAKENING OF THE CONVECTION...WITH THE WW
SCHEDULED TO EXPIRE AT 03Z.
..HURLBUT.. 05/06/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FWD...EWX...SJT...
LAT...LON 30300008 31570010 31569975 32089969 32099883 32269846
31969830 31969789 31399755 31069793 30859789 29989843
30119861 30139926 30269929 30300008SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 5:15 PM CDT | Mesoscale Discussion | SPC | Baylor, Brown, Burnet, Callahan, Coke, Coleman and 21 more | 60 min |
| May 6, 6:05 PM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Cherokee, Grimes, Hardin, Harris and 16 more | 55 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.