Alert archive / Texas / Mesoscale Discussions in 2016
Mesoscale Discussion 459
The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2016, 3:40 PM CDT for 10 counties in Texas. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2016, 3:40 PM CDT (20:40 UTC)
- Expired
- Apr 26, 2016, 5:15 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
Counties Borden County, TX, Fisher County, TX, Glasscock County, TX, Howard County, TX, Kent County, TX, Mitchell County, TX, Nolan County, TX, Scurry County, TX, Sterling County, TX, Stonewall County, TX
The radar
The San Angelo radar (KSJT), 125 km from the middle of the area, began a volume at 20:40 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, 8.7 hours before the alert went out and 127 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
- 6 J/kg
- Mixed-layer CIN
- -346 J/kg
- Mixed-layer LCL
- 2617 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -58 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
505
ACUS11 KWNS 262040
SWOMCD
SPC MCD 262040
TXZ000-262215-
MESOSCALE DISCUSSION 0459
NWS STORM PREDICTION CENTER NORMAN OK
0340 PM CDT TUE APR 26 2016
AREAS AFFECTED...WEST TX
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 262040Z - 262215Z
PROBABILITY OF WATCH ISSUANCE...40 PERCENT
SUMMARY...AN ISOLATED WIND DAMAGE THREAT WILL BE POSSIBLE ACROSS
PARTS OF WEST TX LATE THIS AFTERNOON. WW ISSUANCE MAY BE NEEDED
ACROSS PARTS OF WEST AND NW TX.
DISCUSSION...LATEST SFC ANALYSIS SHOWS A 997 MB LOW OVER NW TX WITH
A DRYLINE EXTENDING SSWWD ACROSS WEST TX. THUNDERSTORMS ARE
DEVELOPING TO THE WEST OF THE DRYLINE DUE TO STRONG LARGE-SCALE
ASCENT ASSOCIATED WITH A SRN ROCKIES UPPER-LEVEL TROUGH EVIDENT ON
WATER VAPOR IMAGERY. THIS CONVECTION IS EXPECTED TO EXPAND IN
COVERAGE AND MOVE NEWD ONTO THE LOW ROLLING PLAINS LATE THIS
AFTERNOON. THE VWP AT LUBBOCK SHOWS A UNIDIRECTIONAL WIND PROFILE
WITH STRONG SPEED SHEAR IN THE MID-LEVELS. THIS COMBINED WITH A VERY
DRY BOUNDARY LAYER WITH SFC TEMP-DEWPOINT SPREADS APPROACHING 50
DEGREES F MAY SUPPORT A THREAT FOR ISOLATED DAMAGING WIND GUSTS.
..BROYLES/CORFIDI.. 04/26/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SJT...LUB...MAF...
LAT...LON 32210039 31560087 31500154 31870194 32510165 33300121
33400061 33210013 32210039SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 1:53 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brown, Callahan, Clay, Coke and 34 more | 2 hr |
| Apr 26, 2:32 PM CDT | Tornado Watch | SPC | Archer, Baylor, Bosque, Brown, Callahan, Clay and 46 more | 9 hr |
| Apr 26, 5:55 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Coke, Coleman, Eastland and 11 more | 65 min |
Nearby
Mesoscale Discussions in Texas, 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.