Alert archive / Texas / Mesoscale Discussions in 2016
Mesoscale Discussion 765
The Storm Prediction Center issued this mesoscale discussion at May 27, 2016, 4:03 PM CDT for 31 parishes in Louisiana; 7 counties in Mississippi; 33 counties in Texas. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- May 27, 2016, 4:03 PM CDT (21:03 UTC)
- Expired
- May 27, 2016, 6:00 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 71 counties
Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Saint Landry Parish, LA, Tensas Parish, LA, Vernon Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Claiborne County, MS, Issaquena County, MS, Jefferson County, MS, Sharkey County, MS, Warren County, MS, Wilkinson County, MS, Austin County, TX, Bee County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Fort Bend County, TX, Goliad County, TX, Gonzales County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Karnes County, TX, Lavaca County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Refugio County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Tyler County, TX, Victoria County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Lake Charles radar (KLCH), 88 km from the middle of the area, began a volume at 21:06 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.1 hours before the alert went out and 90 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
- 2178 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 565 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.7
The text
As transmitted.
550
ACUS11 KWNS 272103
SWOMCD
SPC MCD 272103
MSZ000-LAZ000-ARZ000-TXZ000-272300-
MESOSCALE DISCUSSION 0765
NWS STORM PREDICTION CENTER NORMAN OK
0403 PM CDT FRI MAY 27 2016
AREAS AFFECTED...WESTERN MISSISSIPPI...MUCH OF LOUISIANA...AND
SOUTHEAST/SOUTH TEXAS
CONCERNING...SEVERE THUNDERSTORM WATCH 223...
VALID 272103Z - 272300Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 223
CONTINUES.
SUMMARY...CONTINUE WW 223. SOME SEVERE THREAT WILL EXIST ON THE
WESTERN AND NORTHEASTERN PERIPHERIES OF THE WW OVER THE NEXT 2-3
HOURS.
DISCUSSION...SOUTHEASTWARD-MOVING MCS CONTINUES ACROSS PORTIONS OF
CENTRAL LOUISIANA AND SOUTHEAST TEXAS ATTM. THE AIRMASS DOWNSTREAM
OF THIS MCS CONTINUES TO DESTABILIZE...WITH 2000-4000 J/KG MUCAPE
NOTED /HIGHEST OVER SOUTH TEXAS/. ONE BOWING SEGMENT OVER WINN
PARISH LOUISIANA WAS RESPONSIBLE FOR A 54 KNOT WIND GUST AT IER IN
THE LAST HOUR AND NUMEROUS REPORTS OF TREES DOWN/WIND DAMAGE. THIS
BOWING COMPLEX WILL EXIT WW 223 TO THE NORTHEAST...AND A DOWNSTREAM
WATCH MAY BE NEEDED FOR NORTHEASTERN LOUISIANA AND WESTERN
MISSISSIPPI.
FARTHER SOUTHWEST...AN ISOLATED SEVERE THREAT WILL CONTINUE AS
STORMS REMAIN JUST NORTH OF A WELL-ESTABLISHED COLD POOL FROM HARRIS
TO LAVACA COUNTIES IN TEXAS. ISOLATED INSTANCES OF HAIL AND
DAMAGING WIND MAY OCCUR WITH THIS ACTIVITY.
FINALLY...AN ISOLATED STORM MAY INITIATE ALONG A DRYLINE/COLD POOL
INTERSECTION LOCATED ABOUT 50 WNW VCT. A CONDITIONAL THREAT FOR ALL
MODES OF SEVERE WILL EXIST IF A STORM DEVELOPS IN THIS AREA GIVEN
THE STRONG INSTABILITY AND VERTICAL SHEAR IN PLACE.
..COOK/CORFIDI.. 05/27/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JAN...LIX...LCH...SHV...HGX...CRP...EWX...
LAT...LON 28209675 28219740 28459800 29239797 29769769 30169673
30879506 31769384 32169345 32309298 32499251 32919208
33039187 33199150 33179110 32919062 32489049 31769079
31329099 30869139 30319211 29779258 29689287 29629384
29299484 28949555 28599609 28209675SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 12:57 PM CDT | Mesoscale Discussion | SPC | Allen, Beauregard, Calcasieu, De Soto, Grant, Natchitoches and 3 more | 63 min |
| May 27, 2:04 PM CDT | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 12 more | 6 hr |
| May 26, 7:33 PM CDT | Severe Thunderstorm Watch | SPC | Bosque, Comanche, Dallas, Eastland, Ellis, Erath and 12 more | 5 hr |
| May 26, 7:46 PM CDT | Mesoscale Discussion | SPC | Foard, Hardeman, Wichita, Wilbarger | 59 min |
| May 26, 9:14 PM CDT | Mesoscale Discussion | SPC | Archer, Bandera, Baylor, Brown, Burnet, Callahan and 47 more | 61 min |
| May 26, 10:04 PM CDT | Mesoscale Discussion | SPC | Bastrop, Bexar, Blanco, Caldwell, Comal, Fayette and 6 more | 56 min |
| May 26, 10:17 PM CDT | Severe Thunderstorm Watch | SPC | Bandera, Bastrop, Blanco, Burnet, Caldwell, Comal and 9 more | 6 hr |
| May 26, 11:06 PM CDT | Mesoscale Discussion | SPC | Coryell, Dallas, Ellis, Hill, McLennan | 84 min |
| May 27, 1:30 AM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coleman, Comanche, Concho, Eastland and 9 more | 60 min |
| May 27, 2:14 AM CDT | Mesoscale Discussion | SPC | Austin, Chambers, Colorado, Fayette, Fort Bend, Harris and 4 more | 61 min |
| May 27, 2:38 AM CDT | Severe Thunderstorm Watch | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 16 more | 5 hr |
| May 27, 5:50 AM CDT | Mesoscale Discussion | SPC | Chambers, Hardin, Jasper, Jefferson, Newton, Orange and 1 more | 25 min |
Nearby
Mesoscale Discussions in Texas, 2016Mesoscale Discussions in Louisiana, 2016Mesoscale Discussions in Mississippi, 2016Every mesoscale discussion in 2016
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.