Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 279
The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2012, 9:10 PM CDT for 8 counties in Oklahoma; 13 counties in Texas. It was in force for 35 min.
The area
The outline as issued.
The facts
- Issued
- Mar 18, 2012, 9:10 PM CDT (02:10 UTC)
- Expired
- Mar 18, 2012, 9:45 PM CDT
- In force
- 35 min
- Issued by
- the Storm Prediction Center
All 21 counties
Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Roger Mills County, OK, Washita County, OK, Woodward County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Lipscomb County, TX, Motley County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 129 km from the middle of the area, began a volume at 02:10 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 2.2 hours before the alert went out and 128 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
- 4154 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
679
ACUS11 KWNS 190211
SWOMCD
SPC MCD 190210
OKZ000-TXZ000-190245-
MESOSCALE DISCUSSION 0279
NWS STORM PREDICTION CENTER NORMAN OK
0910 PM CDT SUN MAR 18 2012
AREAS AFFECTED...ERN TX PANHANDLE INTO WRN OK
CONCERNING...TORNADO WATCH 80...
VALID 190210Z - 190245Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 80 CONTINUES.
ONLY ONE SEVERE STORM REMAINS OVER THE ERN TX PANHANDLE WITH LARGE
HAIL THE MAIN THREAT. TORNADO WATCH 80 IS SCHEDULED TO EXPIRE AT
03Z...BUT CAN BE LOCALLY EXTENDED FOR A FEW COUNTIES IF NECESSARY.
OTHERWISE...THE OVERALL SEVERE THREAT WILL DECREASE ON A TEMPORARY
BASIS BEFORE INCREASING AGAIN SOMETIME AFTER 04Z OVER PORTIONS OF
WRN TX.
INCREASING CONVECTIVE INHIBITION RESULTING BOUNDARY LAYER COOLING
BENEATH A WARM EML HAS CONTRIBUTED TO A GRADUAL DECREASE IN STORM
COVERAGE AND INTENSIFY. ONE SEVERE STORM REMAINS OVER THE ERN TX
PANHANDLE AND IS BEING FORCED WITHIN ZONE OF LOCALIZED CONVERGENCE
ALONG RETREATING DRYLINE. COVERAGE OF SEVERE STORMS IS EXPECTED TO
REMAIN VERY ISOLATED THIS EVENING UNTIL AFTER 04Z WHEN ADDITIONAL
STORMS MAY DEVELOP AS DEEPER BAROCLINIC ZONE BEGINS TO OVERTAKE THE
DRYLINE.
..DIAL.. 03/19/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...LUB...AMA...
LAT...LON 36780018 36809960 36349916 35229895 34069962 33420105
33550180 34250137 35150080 36190049 36780018SPC 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, 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, 2:15 PM CDT | Mesoscale Discussion | SPC | Bryan, Love, Marshall | 90 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.