Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 277
The Storm Prediction Center issued this mesoscale discussion at Mar 18, 2012, 7:37 PM CDT for 8 counties in Oklahoma; 19 counties in Texas. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Mar 18, 2012, 7:37 PM CDT (00:37 UTC)
- Expired
- Mar 18, 2012, 8:30 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 27 counties
Beaver County, OK, Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Dickens County, TX, Fisher County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Kent County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX, Wheeler County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 129 km from the middle of the area, began a volume at 00:37 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, 0.6 hours before the alert went out and 145 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.
466
ACUS11 KWNS 190038
SWOMCD
SPC MCD 190037
OKZ000-TXZ000-190130-
MESOSCALE DISCUSSION 0277
NWS STORM PREDICTION CENTER NORMAN OK
0737 PM CDT SUN MAR 18 2012
AREAS AFFECTED...NWRN TX THROUGH ERN TX PANHANDLE INTO WRN OK
CONCERNING...TORNADO WATCH 80...
VALID 190037Z - 190130Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 80 CONTINUES.
IT APPEARS THE GREATEST SEVERE THREAT WILL REMAIN IN WRN OK THROUGH
0130Z OR SO IN ASSOCIATION WITH TORNADIC SUPERCELL OVER GREER COUNTY
MOVING NEWD TOWARD SERN BECKHAM AND SWRN WASHITA COUNTIES. A MORE
LIMITED THREAT EXISTS FARTHER SW INTO NWRN TX. WITH THE EXCEPTION OF
THE OK SUPERCELL...OVERALL SEVERE POTENTIAL APPEARS TO BE ON A
DECREASING TREND. HOWEVER...OTHER SEVERE STORM MAY DEVELOP OVER WRN
TX BETWEEN 03-06Z.
SUPERCELL OVER WRN OK AND REMAINS CAPABLE OF PRODUCING ISOLATED VERY
LARGE HAIL AND TORNADOES. ELSEWHERE STORMS OVER NWRN TX ARE
BEGINNING TO STRUGGLE AND BECOME LESS ORGANIZED. OTHER ACTIVITY IN
WRN TX SE OF LUBBOCK IS DEVELOPING IN RELATIVELY DRY AIR NEAR
RETREATING DRYLINE. MAIN THREAT WITH THESE STORMS APPEARS TO BE
LARGE HAIL AND DAMAGING WIND. DRYLINE WILL CONTINUE TO RETREAT
WWD...AND WITH ONSET OF NOCTURNAL COOLING CONVECTIVE INHIBITION IS
INCREASING. THIS PROCESS IN CONJUNCTION WITH WEAKENING DRYLINE
CIRCULATION AND LIMITED FORCING FOR DEEPER ASCENT SUGGEST MOST
STORMS WILL PROBABLY CONTINUE AN OVERALL WEAKENING TREND AND SEVERE
EVENTS WILL BECOME INCREASINGLY ISOLATED.
OTHER SEVERE STORMS MAY DEVELOP LATER THIS EVENING...AS THE DEEPER
FORCING ACCOMPANYING THE PACIFIC FRONT CURRENTLY OVER ERN NM
INTERCEPTS THE DRYLINE.
..DIAL.. 03/19/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...SJT...LUB...AMA...MAF...
LAT...LON 36839975 35979908 34749895 33539932 32380064 32680142
34520074 35990068 36860090 36839975SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 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.