Area Forecast Discussion
Issued by NWS Austin/San Antonio, TX

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS64 KEWX 271129
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
629 AM CDT Tue Jun 27 2017

.UPDATE...
See below for the 12z aviation discussion...

&&

.AVIATION...
A few isolated pockets of very light showers remain across the
Interstate 35 corridor, but these are not expected to have any impacts
to the TAF sites of AUS, SAT and SSF. Low-end MVFR to upper-end IFR
CIGs have developed at the San Antonio sites with AUS also with MVFR
CIGs. CIGs should improve to VFR by early-to-mid afternoon. Isolated
showers are anticipated to re-develop this afternoon, so have kept
VCSH in the TAFs for the I-35 sites. Precipitation chances should
begin to diminish considerably after tonight as the subtropical ridge
begins building in over the region from the west, likely confining
any showers and thunderstorms to areas east of Interstate 35.
Meanwhile at DRT, a few isolated showers remain to the northwest in
the Sanderson to Langtry area, but these are not expected to impact
DRT. DRT should remain VFR for the entire duration of Tuesday. Winds
will generally be out of the east and fairly light, remaining under
10 knots for all four TAF sites.


&&

.PREV DISCUSSION... /ISSUED 326 AM CDT Tue Jun 27 2017/

SHORT TERM (Today through Wednesday)...
Upper air analysis last evening showed a trough from the Great Lakes
to east Texas with west to west-northwesterly flow over us. At the
surface, there was a stationary front over east Texas with an ill
defined pressure field over our CWA with winds light and variable.
Ongoing convection along several mesoscale boundaries was
dissipating. A shortwave trough will move through the pattern today
bringing another chance for showers and thunderstorms. PW is forecast
to be 1.5-2.0 inches so locally heavy rain is possible with
convection this afternoon and evening. The subtropical ridge will
begin to build back over Texas from the west. This will push rain
chance to the east for Wednesday.

LONG TERM (Wednesday Night through Monday)...
The subtropical ridge will continue to slowly build to the east
keeping most of our CWA dry Wednesday night through Friday. Slight to
low end chance POPs will be confined to the area southeast of I-35.
The push of the upper level ridge will lower PW values, so heavy rain
will be less likely. By Firday night the ridge will be dominant and
no rain chances will remain. The forecast will be for dry weather
through the end of the period. Temperatures will climb back to above
normal by Friday and then level off through the end of the period.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              89  72  92  74  94 /  40  40  20  10  20
Austin Bergstrom Intl Airport  89  72  91  74  93 /  40  40  20  10  20
New Braunfels Muni Airport     87  71  90  73  94 /  50  50  20  10  20
Burnet Muni Airport            87  70  90  72  92 /  40  40  10  10  10
Del Rio Intl Airport           90  72  95  74  98 /  50  50  -   -   -
Georgetown Muni Airport        88  71  90  73  93 /  40  40  10  10  10
Hondo Muni Airport             88  71  92  72  96 /  60  60  10  10  10
San Marcos Muni Airport        88  71  91  73  93 /  50  50  20  10  20
La Grange - Fayette Regional   88  72  90  75  92 /  50  50  30  20  30
San Antonio Intl Airport       87  72  92  74  94 /  60  60  20  10  10
Stinson Muni Airport           88  73  91  74  95 /  60  60  20  10  10

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

Mesoscale/Aviation...Williams
Synoptic/Grids...05


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.