Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 288

March 19, 201210 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2012, 10:46 AM CDT for 10 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Mar 19, 2012, 10:46 AM CDT (15:46 UTC)
Expired
Mar 19, 2012, 12:15 PM CDT
In force
89 min
Issued by
the Storm Prediction Center

Counties Callahan County, TX, Coke County, TX, Irion County, TX, Jones County, TX, Nolan County, TX, Runnels County, TX, Shackelford County, TX, Sterling County, TX, Taylor County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 46 km from the middle of the area, began a volume at 15:48 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

Midland Regional, TX (KMAF), launched 12:00Z, 3.8 hours before the alert went out and 161 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.

Skew-T log-pSkew-T log-p diagram, Midland Regional, TX at 12:00Z on 2012-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 2012-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2079 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
474 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

285 
ACUS11 KWNS 191546
SWOMCD
SPC MCD 191546 
TXZ000-191715-

MESOSCALE DISCUSSION 0288
NWS STORM PREDICTION CENTER NORMAN OK
1046 AM CDT MON MAR 19 2012

AREAS AFFECTED...WEST-CENTRAL TX

CONCERNING...SEVERE THUNDERSTORM WATCH 84...

VALID 191546Z - 191715Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 84
CONTINUES.

ISOLATED SEVERE HAIL REMAINS POSSIBLE ACROSS PORTIONS OF
WEST-CENTRAL TX...BUT THE OVERALL SEVERE THREAT SHOULD REMAIN
LIMITED. THEREFORE...SEVERE TSTM WATCH 84 WILL LIKELY BE ALLOWED TO
EXPIRE AT/BY 17Z.

TSTM CLUSTERS WILL LIKELY REMAIN FOCUSED ALONG/JUST BEHIND A SLOW
EASTWARD-MOVING CONVECTIVE BOUNDARY ACROSS WEST-CENTRAL TX INTO THE
AFTERNOON. GIVEN THE LACK OF AN EXTENSIVE COLD POOL AND NEBULOUS
LARGE SCALE FORCING AT THIS TIME...AHEAD OF A MORE SUBSTANTIAL
SHORTWAVE TROUGH AND JET STREAK ACROSS THE SOUTHERN FOUR
CORNERS/NORTH MEXICO...A SIMILAR NEAR/POST-OUTFLOW FOCUSED
CONVECTIVE MODE SHOULD PERSIST. THIS WILL TEND TO LIMIT DAMAGING
WIND POTENTIAL...AND WHILE VERY STEEP LAPSE RATES EXIST ACROSS THE
REGION...THE EXISTING/EXPECTED CONVECTIVE MODE AND ASSOCIATED
INDIVIDUAL UPDRAFT INTERFERENCE WILL TEND TO ALSO LIMIT THE SEVERE
HAIL LIKELIHOOD.

..GUYER.. 03/19/2012

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...FWD...SJT...MAF...

LAT...LON   31040167 31920113 32969993 33119874 31649962 30780082
            31040167

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 18, 7:37 PM CDTMesoscale DiscussionSPCChildress, Collingsworth, Cottle, Dickens, Fisher, Foard and 13 more53 min
Mar 18, 9:10 PM CDTMesoscale DiscussionSPCChildress, Collingsworth, Cottle, Crosby, Dickens, Donley and 7 more35 min
Mar 18, 10:09 PM CDTMesoscale DiscussionSPCAndrews, Borden, Crane, Crosby, Dawson, Ector and 13 more96 min
Mar 18, 10:50 PM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Briscoe, Castro, Childress, Coke and 39 more11 hr
Mar 18, 11:23 PM CDTTornado WatchSPCBriscoe, Crosby, Floyd, Garza, Hale, Hall and 6 more4 hr
Mar 18, 11:37 PM CDTMesoscale DiscussionSPCCollingsworth, Donley, Gray, Hemphill, Lipscomb, Ochiltree and 2 more53 min
Mar 19, 1:37 AM CDTMesoscale DiscussionSPCBorden, Childress, Coke, Collingsworth, Cottle, Dickens and 25 more83 min
Mar 19, 1:56 AM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Foard, Hardeman, Knox and 2 more4 hr
Mar 19, 3:34 AM CDTMesoscale DiscussionSPCWilbarger86 min
Mar 19, 4:13 AM CDTMesoscale DiscussionSPCCoke, Fisher, Foard, Glasscock, Haskell, Howard and 16 more92 min
Mar 19, 4:39 AM CDTSevere Thunderstorm WatchSPCCallahan, Coke, Coleman, Concho, Crockett, Fisher and 22 more7 hr
Mar 19, 10:05 AM CDTMesoscale DiscussionSPCClay, Cooke, Grayson, Montague115 min
Mar 19, 2:15 PM CDTMesoscale DiscussionSPCBosque, Brown, Collin, Comanche, Concho, Cooke and 26 more90 min
Mar 19, 2:39 PM CDTTornado WatchSPCBandera, Blanco, Bosque, Brown, Burnet, Coleman and 42 more7 hr
Mar 19, 6:05 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Bosque and 47 more85 min
Mar 19, 6:21 PM CDTTornado WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more7 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.