Alert archive / Texas / Mesoscale Discussions in 2013
Mesoscale Discussion 784
The Storm Prediction Center issued this mesoscale discussion at May 23, 2013, 3:32 PM CDT for 16 counties in Texas. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- May 23, 2013, 3:32 PM CDT (20:32 UTC)
- Expired
- May 23, 2013, 5:00 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
Counties Castro County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Fisher County, TX, Floyd County, TX, Garza County, TX, Hale County, TX, Haskell County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Motley County, TX, Scurry County, TX, Stonewall County, TX
The radar
The Lubbock radar (KLBB), 74 km from the middle of the area, began a volume at 20:33 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 8.5 hours before the alert went out and 129 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
- 913 J/kg
- Mixed-layer CIN
- -404 J/kg
- Mixed-layer LCL
- 1745 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 384 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
347
ACUS11 KWNS 232033
SWOMCD
SPC MCD 232032
TXZ000-232200-
MESOSCALE DISCUSSION 0784
NWS STORM PREDICTION CENTER NORMAN OK
0332 PM CDT THU MAY 23 2013
AREAS AFFECTED...PANHANDLE/NWRN TX
CONCERNING...TORNADO WATCH 213...
VALID 232032Z - 232200Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 213 CONTINUES.
SUMMARY...GREATEST NEAR-TERM POTENTIAL FOR VERY LARGE HAIL...SEVERE
WINDS AND MESOCYCLONE TORNADOES SHOULD REMAIN WITH A SUPERCELL
CLUSTER IN THE ERN HALF OF THE LUB CWA. ADDITIONAL TSTMS MAY DEVELOP
BY 22Z ALONG THE OCCLUDED OUTFLOW/FRONT FARTHER NW IN THE WRN TX
PANHANDLE.
DISCUSSION...SUPERCELL OVER FLOYD COUNTY HAS PERSISTENTLY MOVED
SLOWLY SWD...WHILE ADDITIONAL UPDRAFTS HAVE FORMED SEWD ON THE COOL
SIDE OF THE INCREASINGLY DIFFUSE LARGER-SCALE OUTFLOW BOUNDARY. WITH
60S SURFACE DEW POINTS PERSISTING N/E OF THE OUTFLOW ACROSS THE LOW
ROLLING PLAINS INTO N-CNTRL TX /SAMPLED BY 20Z FWD RAOB/...AND
SURFACE TEMPERATURES S/W OF THE BOUNDARY FROM 95-100 DEG F...LARGE
INSTABILITY WILL REMAIN FAVORABLE FOR ALL SEVERE HAZARDS WITH
ACTIVITY GRADUALLY SHIFTING S/SEWD.
FARTHER NW...INITIAL CONVECTIVE ATTEMPTS HAVE FAILED TO YIELD TSTMS
ALONG THE SLOWLY WWD-PROGRESSING OUTFLOW WHICH HAS ESSENTIALLY
OCCLUDED WITH THE REMNANT QUASI-STATIONARY FRONTAL ZONE. ALTHOUGH
TEMPERATURES ARE NOT QUITE AS WARM AS FARTHER S...REINFORCING
OUTFLOW FROM THE SUPERCELL CLUSTERS MAY YIELD SUSTAINABLE CONVECTIVE
DEVELOPMENT INTO THE WRN TX PANHANDLE.
..GRAMS.. 05/23/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...SJT...LUB...AMA...MAF...
LAT...LON 34210044 33809969 33189959 32789978 32650017 32530071
32960149 33780214 34380237 35110256 35410245 35550224
35490202 35180199 34620190 34400163 34160095 34210044SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:52 AM CDT | Mesoscale Discussion | SPC | Collin, Cooke, Denton, Fannin, Grayson, Montague | 53 min |
| May 23, 12:22 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Jeff Davis, Loving, Pecos, Presidio and 4 more | 2 hr |
| May 23, 1:04 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Childress, Cottle, Crosby and 17 more | 116 min |
| May 23, 1:38 PM CDT | Tornado Watch | SPC | Andrews, Armstrong, Bailey, Baylor, Borden, Briscoe and 54 more | 8 hr |
| May 23, 2:03 PM CDT | Severe Thunderstorm Watch | SPC | Brewster, Brown, Coke, Coleman, Concho, Crane and 24 more | 8 hr |
| May 23, 3:46 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Culberson, Ector, Jeff Davis, Loving and 8 more | 59 min |
| May 23, 6:10 PM CDT | Mesoscale Discussion | SPC | Armstrong, Borden, Briscoe, Callahan, Carson, Castro and 29 more | 95 min |
Nearby
Mesoscale Discussions in Texas, 2013Every mesoscale discussion in 2013
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.