Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 643
The Storm Prediction Center issued this mesoscale discussion at May 14, 2015, 6:28 PM CDT for 37 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 14, 2015, 6:28 PM CDT (23:28 UTC)
- Expired
- May 14, 2015, 8:00 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 37 counties
Andrews County, TX, Borden County, TX, Cochran County, TX, Coke County, TX, Crane County, TX, Crockett County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Ector County, TX, Fisher County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Hockley County, TX, Howard County, TX, Irion County, TX, Kent County, TX, King County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Pecos County, TX, Reagan County, TX, Schleicher County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Terry County, TX, Tom Green County, TX, Upton County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX
The radar
The Midland/Odessa radar (KMAF), 5 km from the middle of the area, began a volume at 23:30 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
Midland Regional, TX (KMAF), launched 12:00Z, 11.5 hours before the alert went out and 6 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
- 14 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 1461 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
162 ACUS11 KWNS 142328 SWOMCD SPC MCD 142328 TXZ000-NMZ000-150100- MESOSCALE DISCUSSION 0643 NWS STORM PREDICTION CENTER NORMAN OK 0628 PM CDT THU MAY 14 2015 AREAS AFFECTED...WEST TX CONCERNING...SEVERE THUNDERSTORM WATCH 171... VALID 142328Z - 150100Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 171 CONTINUES. SUMMARY...SEVERE THREAT CONTINUES ACROSS WW 171...ESPECIALLY WESTERN AND NORTHERN PORTIONS. DISCUSSION...LATEST SHORT-RANGE MODEL GUIDANCE SUGGESTS A WEAK MID-LEVEL SHORT-WAVE TROUGH IS EJECTING INTO THE SRN HIGH PLAINS THIS EVENING. LLJ IS FORECAST TO RESPOND AND INCREASE OVER THE NEXT FEW HOURS AND THIS MAY ENCOURAGE AN UPWARD EVOLVING CLUSTER OF THUNDERSTORMS OVER THE TX SOUTH PLAINS AFTER DARK. LATEST RADAR DATA SEEMS TO SUPPORT THIS IDEA WITH A GRADUAL INCREASE IN CONVECTION FROM WEST OF MAF TO NEAR LBB. AS THIS ACTIVITY INCREASES A LARGER COMPLEX OF STORMS MAY EVOLVE WITH AN MCS POSSIBLE BY MID EVENING BEFORE SHIFTING INTO NWRN TX/SWRN OK. LARGE HAIL IS THE GREATEST SEVERE THREAT. ..DARROW.. 05/14/2015 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OUN...SJT...LUB...MAF...ABQ... LAT...LON 30610357 33860313 33869999 30610053 30610357
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 7:15 PM CDT | Mesoscale Discussion | SPC | Carson, Childress, Collingsworth, Cottle, Donley, Foard and 5 more | 90 min |
| May 14, 2:36 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Cochran, Coke, Crane, Crosby and 32 more | 114 min |
| May 14, 4:05 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Bailey, Borden, Briscoe, Castro, Childress and 45 more | 7 hr |
| May 14, 5:48 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Comal, Dimmit, Edwards and 16 more | 117 min |
Nearby
Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015
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.