Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 814
The Storm Prediction Center issued this mesoscale discussion at May 14, 2012, 6:57 PM CDT for Maverick County, Texas. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- May 14, 2012, 6:57 PM CDT (23:57 UTC)
- Expired
- May 14, 2012, 8:00 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
County Maverick County, TX
The radar
The Laughlin AFB radar (KDFX), 101 km from the middle of the area, began a volume at 23:56 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
Del Rio, TX (KDRT), launched 12:00Z, 12.0 hours before the alert went out and 92 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
- 2014 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
173 ACUS11 KWNS 142358 SWOMCD SPC MCD 142357 TXZ000-150100- MESOSCALE DISCUSSION 0814 NWS STORM PREDICTION CENTER NORMAN OK 0657 PM CDT MON MAY 14 2012 AREAS AFFECTED...MIDDLE RIO GRANDE VALLEY CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 142357Z - 150100Z PROBABILITY OF WATCH ISSUANCE...60 PERCENT SUMMARY...SEVERE THUNDERSTORM WATCH MAY BE REQUIRED TO ACCOUNT FOR SEVERE THUNDERSTORMS DIGGING SEWD ALONG THE RIO GRANDE RIVER. DISCUSSION...CLUSTERS OF STRONG/SEVERE THUNDERSTORMS ARE EXPANDING IN AREAL COVERAGE/INTENSITY ACROSS NERN MEXICO JUST SOUTH OF THE BIG BEND. THIS ACTIVITY IS MOVING ACROSS AN ENVIRONMENT CHARACTERIZED BY STEEP LAPSE RATES AND MODEST INSTABILITY. OF PARTICULAR IMPORTANCE...A STRONG MID LEVEL SPEED MAX IS DIGGING SEWD TOWARD SOUTH TX AND THIS SHOULD ENCOURAGE ONGOING CONVECTION TO SPREAD TOWARD THE SRN VALLEY. WHILE THE GREATEST CONCENTRATION OF STORMS SHOULD REMAIN WEST OF THE RIVER IT/S BECOMING MORE LIKELY THAT SOME OF IT WILL CROSS THE RIVER. ..DARROW/WEISS.. 05/14/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CRP...EWX... LAT...LON 29700129 29200022 27499926 26770087 28430252 29700129
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 9:14 PM CDT | Mesoscale Discussion | SPC | Culberson, Jeff Davis, Loving, Reeves, Ward | 61 min |
| May 13, 9:21 PM CDT | Severe Thunderstorm Watch | SPC | Brewster, Crane, Culberson, Jeff Davis, Loving, Pecos and 4 more | 7 hr |
| May 13, 11:37 PM CDT | Mesoscale Discussion | SPC | Crane, Culberson, Ector, Jeff Davis, Loving, Pecos and 3 more | 53 min |
| May 14, 2:17 AM CDT | Mesoscale Discussion | SPC | Val Verde | 118 min |
| May 14, 1:55 PM CDT | Mesoscale Discussion | SPC | Brewster, Concho, Crockett, Edwards, Irion, Jeff Davis and 9 more | 3 hr |
| May 14, 2:55 PM CDT | Severe Thunderstorm Watch | SPC | Brewster, Jeff Davis, Pecos, Presidio, Reeves, Terrell | 5 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; radar from the NEXRAD Level II archive.