Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 539
The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2012, 10:11 PM CDT for 23 counties in Texas. It was in force for 34 min.
The area
The outline as issued.
The facts
- Issued
- Apr 14, 2012, 10:11 PM CDT (03:11 UTC)
- Expired
- Apr 14, 2012, 10:45 PM CDT
- In force
- 34 min
- Issued by
- the Storm Prediction Center
All 23 counties
Borden County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Ector County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hemphill County, TX, Howard County, TX, Kent County, TX, Lipscomb County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Scurry County, TX, Wheeler County, TX
The radar
The Lubbock radar (KLBB), 46 km from the middle of the area, began a volume at 03:12 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 3.2 hours before the alert went out and 187 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 5237 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
765
ACUS11 KWNS 150312
SWOMCD
SPC MCD 150311
OKZ000-TXZ000-150345-
MESOSCALE DISCUSSION 0539
NWS STORM PREDICTION CENTER NORMAN OK
1011 PM CDT SAT APR 14 2012
AREAS AFFECTED...PARTS OF WRN
CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON
VALID 150311Z - 150345Z
A WATCH LIKELY WILL BE ISSUED SHORTLY.
THE EASTWARD SURGE OF THE PACIFIC COLD FRONT IS NOW WELL UNDERWAY.
STORMS HAVE INITIATED WHERE THIS FEATURE HAS OVERTAKEN THE
RETREATING DRY LINE...AND GUIDANCE HAS BEEN SUGGESTIVE THAT THE
GRADUAL EVOLUTION OF A MORE EXTENSIVE SQUALL LINE MAY CONTINUE
ACROSS THE SOUTHERN HIGH PLAINS THROUGH 06-08Z. IN THE PRESENCE OF
STRONG SHEAR ASSOCIATED WITH THE 90-100+ KT 500 MB JET SHIFTING EAST
OF THE ROCKIES...LAPSE RATES ACROSS THE HIGH PLAINS REMAIN
STEEP...AND SUPPORTIVE OF AT LEAST SOME LARGE HAIL POTENTIAL IN
STRONGER STORMS IN THE NEAR TERM. AN INCREASINGLY ORGANIZED
DAMAGING WIND THREAT IS NOT OUT OF THE QUESTION...BUT IT MAY TAKE A
WHILE YET FOR THIS TO EVOLVE.
..KERR.. 04/15/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...SJT...LUB...AMA...MAF...
LAT...LON 32160263 33200194 33930135 36280049 36459993 35729974
32820054 31540143 31500256 32160263SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 10:29 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Archer, Baylor, Borden, Briscoe, Callahan and 43 more | 6 hr |
| Apr 15, 9:25 AM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Delta, Franklin, Gregg and 10 more | 95 min |
| Apr 15, 3:44 PM CDT | Mesoscale Discussion | SPC | Panola, Shelby | 91 min |
| Apr 15, 6:29 PM CDT | Mesoscale Discussion | SPC | Refugio, San Patricio | 91 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.