Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 758
The Storm Prediction Center issued this mesoscale discussion at May 25, 2015, 6:50 AM CDT for 32 counties in Texas. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- May 25, 2015, 6:50 AM CDT (11:50 UTC)
- Expired
- May 25, 2015, 7:45 AM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 32 counties
Andrews County, TX, Borden County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Terry County, TX, Throckmorton County, TX
The radar
The Lubbock radar (KLBB), 83 km from the middle of the area, began a volume at 11:51 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
Midland Regional, TX (KMAF), launched 00:00Z, 11.8 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3636 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
253
ACUS11 KWNS 251151
SWOMCD
SPC MCD 251150
TXZ000-251245-
MESOSCALE DISCUSSION 0758
NWS STORM PREDICTION CENTER NORMAN OK
0650 AM CDT MON MAY 25 2015
AREAS AFFECTED...NW TX
CONCERNING...SEVERE THUNDERSTORM WATCH 209...
VALID 251150Z - 251245Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 209
CONTINUES.
SUMMARY...CLUSTER OF STRONG TO SEVERE STORMS EXPECTED TO DEVELOP
EAST-NORTHEAST FROM THE TEXAS SOUTH PLAINS TOWARDS THE LOW ROLLING
PLAINS AND BIG COUNTRY THROUGH MIDDAY.
DISCUSSION...TSTMS HAVE INTENSIFIED JUST N OF MAF WITHIN STRONGLY
FORCED ASCENT IMMEDIATELY AHEAD OF A COMPACT SHORTWAVE TROUGH. AS
THIS IMPULSE TRACKS E/NE THROUGH LATE MORNING...STRONG TO SEVERE
STORMS WILL PROBABLY BE MAINTAINED ALONG THE NWRN PERIPHERY OF THE
WRN GULF AIR MASS THAT HAS BECOME ESTABLISHED ACROSS THE BIG
COUNTRY. WITH MID-LEVEL LAPSE RATES EXCEEDING 8 DEG C/KM...LARGE
HAIL WILL BE THE PRIMARY INITIAL HAZARD. DEVELOPMENT OF A COLD POOL
AND ASSOCIATED DIFFERENTIAL HEATING WITH DESTABILIZING DOWNSTREAM
AIR MASS SHOULD FOSTER AN INCREASING DAMAGING WIND RISK BY LATE
MORNING.
..GRAMS.. 05/25/2015
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FWD...OUN...SJT...LUB...MAF...
LAT...LON 31550126 32090305 32150305 32680305 32860305 32950305
33810208 33830168 33830162 33830158 33830152 33830140
33830125 33830087 33840051 33840038 33840006 33840000
33409894 32959894 32089912 31579972 31550126 31550126SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 7:57 PM CDT | Mesoscale Discussion | SPC | Hemphill, Lipscomb, Ochiltree, Roberts | 93 min |
| May 24, 8:24 PM CDT | Tornado Watch | SPC | Hansford, Lipscomb, Ochiltree | 5 hr |
| May 25, 3:17 AM CDT | Mesoscale Discussion | SPC | Bandera, Coke, Crane, Crockett, Ector, Edwards and 21 more | 4 hr |
| May 25, 6:45 AM CDT | Severe Thunderstorm Watch | SPC | Andrews, Borden, Brown, Callahan, Coke, Coleman and 34 more | 6 hr |
| May 25, 7:53 AM CDT | Mesoscale Discussion | SPC | Bandera, Bexar, Blanco, Burnet, Comal, Frio and 8 more | 2 hr |
| May 25, 9:02 AM CDT | Tornado Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more | 7 hr |
| May 25, 10:13 AM CDT | Mesoscale Discussion | SPC | Anderson, Archer, Baylor, Bell, Bosque, Brown and 69 more | 2 hr |
| May 25, 10:54 AM CDT | Tornado Watch | SPC | Archer, Baylor, Bell, Bosque, Brown, Callahan and 55 more | 7 hr |
| May 25, 11:37 AM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more | 113 min |
| May 25, 1:54 PM CDT | Mesoscale Discussion | SPC | Bell, Bosque, Clay, Collin, Cooke, Coryell and 26 more | 2 hr |
| May 25, 2:10 PM CDT | Mesoscale Discussion | SPC | Austin, Bastrop, Bexar, Blanco, Brazos, Burleson and 26 more | 95 min |
| May 25, 2:35 PM CDT | Mesoscale Discussion | SPC | Anderson, Austin, Bowie, Brazos, Burleson, Camp and 34 more | 55 min |
| May 25, 2:52 PM CDT | Tornado Watch | SPC | Anderson, Angelina, Bastrop, Blanco, Bowie, Brazos and 53 more | 8 hr |
| May 25, 3:19 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Dimmit, Edwards, Frio and 9 more | 56 min |
| May 25, 5:15 PM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Gregg, Harrison, Marion and 7 more | 90 min |
| May 25, 5:51 PM CDT | Tornado Watch | SPC | Sabine | 6 hr |
| May 25, 6:06 PM CDT | Mesoscale Discussion | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 14 more | 54 min |
| May 25, 6:24 PM CDT | Tornado Watch | SPC | Austin, Bee, Brazoria, Calhoun, Chambers, Colorado and 18 more | 9 hr |
Nearby
Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015
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.