Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 286
The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2012, 4:13 AM CDT for 22 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Mar 19, 2012, 4:13 AM CDT (09:13 UTC)
- Expired
- Mar 19, 2012, 5:45 AM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 22 counties
Coke County, TX, Fisher County, TX, Foard County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Tom Green County, TX, Upton County, TX
The radar
The San Angelo radar (KSJT), 97 km from the middle of the area, began a volume at 09:13 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 00:00Z, 9.2 hours before the alert went out and 135 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
- 786 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 2412 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
483
ACUS11 KWNS 190914
SWOMCD
SPC MCD 190913
TXZ000-191045-
MESOSCALE DISCUSSION 0286
NWS STORM PREDICTION CENTER NORMAN OK
0413 AM CDT MON MAR 19 2012
AREAS AFFECTED...PARTS OF W CNTRL AND NORTHWEST TX
CONCERNING...SEVERE THUNDERSTORM WATCH 81...
VALID 190913Z - 191045Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 81
CONTINUES.
WW 81 WILL NEED TO BE REPLACED WITH A NEW WW BY 10Z.
THE SOUTHERN PORTION OF THE MORE EXTENSIVE AND STILL EVOLVING
SOUTHERN PLAINS SQUALL LINE REMAINS QUASI-STATIONARY NEAR THE DRY
LINE ACROSS THE TEXAS SOUTH PLAINS. WITH THE MAIN UPPER JET STILL
DIGGING INTO THE LARGE-SCALE TROUGH OVER THE INTERMOUNTAIN
WEST...EASTWARD PROGRESSION WILL REMAIN SLOW. HOWEVER...MODELS
INDICATE THAT AN AXIS OF STRONGER MID-LEVEL HEIGHT FALLS WILL
GRADUALLY SHIFT EAST OF THE SOUTHERN ROCKIES THROUGH THE CENTRAL AND
SOUTHERN HIGH PLAINS BY MIDDAY TODAY. A SMALLER SCALE IMPULSE IS
EVIDENT IN SATELLITE IMAGERY PROGRESSING THROUGH THE BASE OF THE
TROUGH...ACROSS NORTHERN MEXICO...AND IT APPEARS THAT THIS COULD
BEGIN IMPACTING THE SOUTHERN PLAINS AS EARLY AS THE 12-15Z TIME
FRAME. ONCE THIS DOES OCCUR...THE SQUALL LINE LIKELY WILL BEGIN
ACCELERATING EAST NORTHEASTWARD TOWARD WICHITA FALLS/ABILENE AND
PORTIONS OF WEST CENTRAL TEXAS NEAR/NORTH OF SAN ANGELO...WHERE
BOUNDARY LAYER CAPE REMAINS MODERATELY LARGE...AND A 50-60+ KT
SOUTHERLY 850 MB JET WILL BE MAINTAINED. THIS ENVIRONMENT WILL BE
CONDUCIVE TO THE RISK FOR POTENTIALLY DAMAGING CONVECTIVE WIND
GUSTS...LARGE HAIL...AND PERHAPS ISOLATED TORNADOES.
..KERR.. 03/19/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...SJT...LUB...MAF...
LAT...LON 31330207 32390162 33150085 34019992 34009922 32169952
30700063 30770129 31330207SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 7:37 PM CDT | Mesoscale Discussion | SPC | Childress, Collingsworth, Cottle, Dickens, Fisher, Foard and 13 more | 53 min |
| Mar 18, 9:10 PM CDT | Mesoscale Discussion | SPC | Childress, Collingsworth, Cottle, Crosby, Dickens, Donley and 7 more | 35 min |
| Mar 18, 10:09 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Crane, Crosby, Dawson, Ector and 13 more | 96 min |
| Mar 18, 10:50 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Borden, Briscoe, Castro, Childress, Coke and 39 more | 11 hr |
| Mar 18, 11:23 PM CDT | Tornado Watch | SPC | Briscoe, Crosby, Floyd, Garza, Hale, Hall and 6 more | 4 hr |
| Mar 18, 11:37 PM CDT | Mesoscale Discussion | SPC | Collingsworth, Donley, Gray, Hemphill, Lipscomb, Ochiltree and 2 more | 53 min |
| Mar 19, 1:37 AM CDT | Mesoscale Discussion | SPC | Borden, Childress, Coke, Collingsworth, Cottle, Dickens and 25 more | 83 min |
| Mar 19, 1:56 AM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Clay, Foard, Hardeman, Knox and 2 more | 4 hr |
| Mar 19, 3:34 AM CDT | Mesoscale Discussion | SPC | Wilbarger | 86 min |
| Mar 19, 4:39 AM CDT | Severe Thunderstorm Watch | SPC | Callahan, Coke, Coleman, Concho, Crockett, Fisher and 22 more | 7 hr |
| Mar 19, 10:05 AM CDT | Mesoscale Discussion | SPC | Clay, Cooke, Grayson, Montague | 115 min |
| Mar 19, 10:46 AM CDT | Mesoscale Discussion | SPC | Callahan, Coke, Irion, Jones, Nolan, Runnels and 4 more | 89 min |
| Mar 19, 2:15 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Collin, Comanche, Concho, Cooke and 26 more | 90 min |
| Mar 19, 2:39 PM CDT | Tornado Watch | SPC | Bandera, Blanco, Bosque, Brown, Burnet, Coleman and 42 more | 7 hr |
| Mar 19, 6:05 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Bosque and 47 more | 85 min |
| Mar 19, 6:21 PM CDT | Tornado Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more | 7 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.