Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 290
The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2012, 2:15 PM CDT for Bryan County, Love County, Marshall County, Oklahoma; 32 counties in Texas. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Mar 19, 2012, 2:15 PM CDT (19:15 UTC)
- Expired
- Mar 19, 2012, 3:45 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 35 counties
Bryan County, OK, Love County, OK, Marshall County, OK, Bosque County, TX, Brown County, TX, Collin County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Kimble County, TX, Lampasas County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Sutton County, TX, Tarrant County, TX, Wise County, TX
The radar
The Dyess AFB radar (KDYX), 83 km from the middle of the area, began a volume at 19:17 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
Fort Worth, TX (KFWD), launched 12:00Z, 7.3 hours before the alert went out and 166 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
- 1782 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 509 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 318 m²/s²
- 0-3 km storm-relative helicity
- 447 m²/s²
- Significant tornado parameter
- 3.3
- Supercell composite
- 17.2
The text
As transmitted, in the capitals the NWS used until 2016.
936
ACUS11 KWNS 191916
SWOMCD
SPC MCD 191915
TXZ000-OKZ000-192045-
MESOSCALE DISCUSSION 0290
NWS STORM PREDICTION CENTER NORMAN OK
0215 PM CDT MON MAR 19 2012
AREAS AFFECTED...NORTH-CENTRAL/WEST-CENTRAL TX INTO
SOUTH-CENTRAL/SOUTHEAST OK
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 191915Z - 192045Z
MONITORING CONVECTIVE TRENDS FOR AN INCREASING SEVERE THREAT ACROSS
NORTH-CENTRAL/WEST-CENTRAL TX INTO PORTIONS OF
SOUTH-CENTRAL/SOUTHEAST OK THIS AFTERNOON. SUCH A THREAT WOULD
INCLUDE DAMAGING WINDS/SEVERE HAIL...AS WELL AS A FEW TORNADOES.
CONTINUED INCREASING CONVECTIVE TRENDS WOULD LIKELY PROMPT A WATCH
ISSUANCE.
EXTENSIVE COLD POOL PERSISTS ACROSS WESTERN/NORTHERN OK...WITH
PERIPHERAL/CONVECTIVELY REINFORCED OUTFLOW BOUNDARY EXTENDING FROM
FAR NORTHEAST OK SOUTH-SOUTHWESTWARD INTO PORTIONS OF
NORTH/WEST-CENTRAL TX IN VICINITY OF SHERMAN/MINERAL WELLS/BROWNWOOD
AS OF 19Z. THE TX PORTION OF THIS CONVECTIVE OUTFLOW HAS CONTINUED
TO SLOW ITS EASTWARD PROGRESSION...WITH SOME RECENT UPDRAFT
INTENSIFICATION EVIDENT PER RADAR/SATELLITE ON THE LEADING EDGE OF
THE COMPOSITE OUTFLOW IN GENERAL VICINITY OF THE
BROWNWOOD/STEPHENVILLE TX AREAS. EVEN THOUGH THE 18Z OBSERVED
SOUNDING FROM FORT WORTH WAS INDICATIVE OF SEVERAL DEGREES C OF
WARMING AND ADDITIONAL CAPPING ALOFT /AROUND AND ABOVE 800 MB/ SINCE
THIS MORNING...STEEPENING LOW LEVEL LAPSE RATES AND SOMEWHAT ABATING
STRENGTH/SPEED OF THE COLD POOL MAY FAVOR STORM INTENSIFICATION OVER
THE NEXT SEVERAL HOURS. ADDITIONALLY...OTHER STORMS HAVE ALSO
INCREASED RECENTLY BETWEEN SAN ANGELO AND JUNCTION TX...WHICH
APPEARS TO BE AT LEAST SOMEWHAT TIED TO A NORTHEAST-SURGING JET
STREAK ALOFT/INCREASING DEEP ASCENT ACROSS SOUTHWEST TX.
..GUYER.. 03/19/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FWD...OUN...EWX...SJT...
LAT...LON 30460071 31030024 32249874 33449803 34539698 33759584
31609717 30030006 30460071SPC 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 | Beaver, Beckham, Ellis, Greer, Harmon, Jackson and 2 more | 53 min |
| Mar 18, 9:10 PM CDT | Mesoscale Discussion | SPC | Beckham, Ellis, Greer, Harmon, Jackson, Roger Mills and 2 more | 35 min |
| Mar 18, 11:37 PM CDT | Mesoscale Discussion | SPC | Beaver, Ellis, Harper | 53 min |
| Mar 19, 1:37 AM CDT | Mesoscale Discussion | SPC | Beckham, Greer, Harmon, Jackson, Roger Mills | 83 min |
| Mar 19, 1:56 AM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 19 more | 4 hr |
| Mar 19, 3:34 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 21 more | 86 min |
| Mar 19, 10:05 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Cleveland, Coal, Garvin and 15 more | 115 min |
| Mar 19, 3:55 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 14 more | 95 min |
| Mar 19, 4:20 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 11 more | 5 hr |
| Mar 19, 6:32 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 9 more | 58 min |
| Mar 19, 6:53 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 6 more | 5 hr |
| 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 19, 4:13 AM CDT | Mesoscale Discussion | SPC | Coke, Fisher, Foard, Glasscock, Haskell, Howard and 16 more | 92 min |
| Mar 19, 4:39 AM CDT | Severe Thunderstorm Watch | SPC | Callahan, Coke, Coleman, Concho, Crockett, Fisher and 22 more | 7 hr |
| Mar 19, 10:46 AM CDT | Mesoscale Discussion | SPC | Callahan, Coke, Irion, Jones, Nolan, Runnels and 4 more | 89 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, 2012Mesoscale Discussions in Oklahoma, 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.