Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 480
The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2012, 4:03 PM MDT for Eddy County, Lea County, New Mexico; 15 counties in Texas. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2012, 4:03 PM MDT (22:03 UTC)
- Expired
- Apr 9, 2012, 5:30 PM MDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
Counties Eddy County, NM, Lea County, NM, Andrews County, TX, Crane County, TX, Dawson County, TX, Ector County, TX, Gaines County, TX, Jeff Davis County, TX, Loving County, TX, Martin County, TX, Midland County, TX, Pecos County, TX, Reeves County, TX, Upton County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX
The radar
The Midland/Odessa radar (KMAF), 122 km from the middle of the area, began a volume at 22:04 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
Midland Regional, TX (KMAF), launched 12:00Z, 10.1 hours before the alert went out and 122 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
- 62 J/kg
- Mixed-layer CIN
- -303 J/kg
- Mixed-layer LCL
- 1056 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
379 ACUS11 KWNS 092203 SWOMCD SPC MCD 092203 TXZ000-NMZ000-092330- MESOSCALE DISCUSSION 0480 NWS STORM PREDICTION CENTER NORMAN OK 0503 PM CDT MON APR 09 2012 AREAS AFFECTED...SERN NM...WEST TX CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 092203Z - 092330Z STRONG SUNSHINE HAS CONTRIBUTED GREATLY TO INSTABILITY ACROSS THE SRN HIGH PLAINS. LATEST DIAGNOSTIC DATA EXHIBITS STEEP LOW LEVEL LAPSE RATES ACROSS THIS REGION WITH SFC-3KM VALUES ON THE ORDER OF 9 C/KM ACROSS UPSLOPE REGIONS OF W TX INTO SERN NM. AS A RESULT...CONSIDERABLE AMOUNT OF CONVECTION HAS EVOLVED OR IS DEVELOPING ACROSS THE HIGHER TERRAIN AND STORM MOTIONS WOULD SUPPORT A SLOW SEWD MOVEMENT DURING THE EVENING HOURS. LARGE HAIL IS THE GREATEST SEVERE THREAT WITH THIS ACTIVITY AND A SEVERE THUNDERSTORM WATCH MAY BE REQUIRED. ..DARROW.. 04/09/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SJT...LUB...MAF...ABQ... LAT...LON 30410449 32300448 33310345 32980141 30380227 30410449
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 4:32 PM MDT | Severe Thunderstorm Watch | SPC | Eddy, Lea | 7 hr |
| Apr 9, 12:54 PM MDT | Mesoscale Discussion | SPC | Hemphill, Lipscomb, Wheeler | 96 min |
| Apr 9, 2:06 PM MDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Borden, Briscoe, Carson, Castro and 31 more | 54 min |
| Apr 9, 2:23 PM MDT | Severe Thunderstorm Watch | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 27 more | 8 hr |
| Apr 9, 4:37 PM MDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Castro, Childress, Cochran and 22 more | 83 min |
| Apr 9, 5:27 PM MDT | Tornado Watch | SPC | Baylor, Foard, Hardeman, Knox, Wichita, Wilbarger | 8 hr |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in New Mexico, 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.