Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 474
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2012, 6:41 PM CDT for 32 counties in Texas. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2012, 6:41 PM CDT (23:41 UTC)
- Expired
- Apr 7, 2012, 7:45 PM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 32 counties
Archer County, TX, Brewster County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Eastland County, TX, Erath County, TX, Glasscock County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX, Young County, TX
The nearest sounding before it
Midland Regional, TX (KMAF), launched 12:00Z, 11.7 hours before the alert went out and 129 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
- 993 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 1189 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
739 ACUS11 KWNS 072342 SWOMCD SPC MCD 072341 TXZ000-080045- MESOSCALE DISCUSSION 0474 NWS STORM PREDICTION CENTER NORMAN OK 0641 PM CDT SAT APR 07 2012 AREAS AFFECTED...WRN/N CNTRL TX INTO S CNTRL OK CONCERNING...SEVERE THUNDERSTORM WATCH 150... VALID 072341Z - 080045Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 150 CONTINUES. A SEVERE WEATHER THREAT WILL CONTINUE ACROSS WW 150 WITH THE PRIMARY THREATS OF LARGE HAIL AND DMGG WINDS. SFC ANALYSIS CURRENTLY DEPICTS A COLD FRONT ALONG A FST TO ABI TO ADM LINE WITH THUNDERSTORMS ONGOING S OF BGS AND NEAR ABI. SURFACE TEMPERATURES SOUTH OF THE FRONT ARE IN THE 80S WITH DEWPOINT VALUES IN THE 60S. WARMEST TEMPERATURES...HIGHEST DEWPOINTS...AND BEST CONVERGENCE ARE ALONG THE SRN PORTIONS OF THE FRONT /ABI SWWD TOWARDS FST/. AS A RESULT...THE BEST CHANCE OF CONTINUING/INCREASING THUNDERSTORM ACTIVITY IS IN THIS AREA. FARTHER N...WEAKENING WINDS AND SLIGHTLY LOWER DEWPOINTS BRING UNCERTAINTY REGARDING CONVECTIVE INITIATION. ADDITIONALLY...DESPITE SURFACE OBJECTIVE ANALYSIS DEPICTING AN UNCAPPED ML PARCEL...WARM TEMPERATURES ALOFT ASSOCIATED WITH SWLY FLOW ARE LIKELY INHIBITING THUNDERSTORM DEVELOPMENT. ..MOSIER.. 04/07/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FWD...OUN...EWX...SJT...LUB...MAF... LAT...LON 29310326 31040326 33999808 32279806 29310326
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 2:29 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brewster, Callahan, Clay, Coke and 21 more | 61 min |
| Apr 7, 3:01 PM CDT | Severe Thunderstorm Watch | SPC | Brewster, Callahan, Coke, Coleman, Concho, Crane and 27 more | 9 hr |
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.