Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 516
The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2012, 9:23 PM CDT for 7 counties in Texas. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2012, 9:23 PM CDT (02:23 UTC)
- Expired
- Apr 13, 2012, 11:00 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
Counties Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Hall County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 88 km from the middle of the area, began a volume at 02:23 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 2.4 hours before the alert went out and 87 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
- 5887 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
869 ACUS11 KWNS 140224 SWOMCD SPC MCD 140223 TXZ000-140400- MESOSCALE DISCUSSION 0516 NWS STORM PREDICTION CENTER NORMAN OK 0923 PM CDT FRI APR 13 2012 AREAS AFFECTED...TX PANHANDLE CONCERNING...SEVERE THUNDERSTORM WATCH 162... VALID 140223Z - 140400Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 162 CONTINUES. SEVERE TSTM WATCH 162 CONTINUES UNTIL 06Z...WITH THE PRIMARY SEVERE THREAT REMAINING ACROSS THE SOUTHEAST TX PANHANDLE. STRONG/POTENTIALLY SEVERE TSTM DEVELOPMENT WILL LIKELY REMAIN FOCUSED ALONG THE TX/OK BORDER VICINITY LATE THIS EVENING...WITH HAIL REMAINING THE PRIMARY HAZARD AS MOIST/UNSTABLE INFLOW PERSISTS NEAR/JUST ABOVE THE SURFACE. PER SURFACE OBS/WIND PROFILERS...CONVERGENCE/CONFLUENCE NEAR AND JUST ABOVE THE SURFACE APPEARS TO BE WEAKENING AS MASS FIELDS ARE BEING NOCTURNALLY INFLUENCED AND EVOLVING IN RESPONSE TO THE AMPLIFYING SOUTHWEST STATES UPPER TROUGH. EVEN WHILE THE MOIST SECTOR WILL CONTINUE TO RETREAT NORTHWESTWARD...THIS PUTS INTO QUESTION THE EXTENT/LIKELIHOOD OF SEVERE TSTM DEVELOPMENT ACROSS MUCH OF SEVERE TSTM 162. WELL BEYOND THE CURRENT WATCH...THERE IS SOME CONCERN THAT STORMS COULD INCREASE OVERNIGHT/EARLY SATURDAY ACROSS THE TX PANHANDLE VICINITY AS PER VARIOUS NUMERICAL GUIDANCE...WITH A REJUVENATED SEVERE HAIL THREAT CONDITIONALLY POSSIBLE WITHIN A STEEP LAPSE ENVIRONMENT. ..GUYER.. 04/14/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LUB...AMA... LAT...LON 34710183 35480011 33860025 34710183
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:35 PM CDT | Mesoscale Discussion | SPC | Childress, Collingsworth, Hardeman | 55 min |
| Apr 14, 9:42 AM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Childress, Collingsworth, Donley and 13 more | 93 min |
| Apr 14, 11:44 AM CDT | Mesoscale Discussion | SPC | Lipscomb | 61 min |
| Apr 14, 1:23 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Childress, Clay, Collingsworth, Foard and 6 more | 2 hr |
| Apr 14, 3:48 PM CDT | Mesoscale Discussion | SPC | Collingsworth, Hemphill, Lipscomb, Wheeler | 57 min |
| Apr 14, 5:24 PM CDT | Tornado Watch | SPC | Collingsworth, Hemphill, Lipscomb, Wheeler | 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; radar from the NEXRAD Level II archive.