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

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531
FXUS64 KEWX 201738
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
1138 AM CST Wed Feb 20 2019

.UPDATE...
18Z Aviation forecast below.

&&

.AVIATION...
VFR conditions this afternoon through Thursday morning with high
cirrus streaming through the region. A brief period of NW wind less
than 10 kts possible at AUS/SAT/SSF early this afternoon before
becoming variable around or less than 5 kts late afternoon and
tonight. SE wind around 5 kts developing at DRT.

&&

PREV DISCUSSION... /ISSUED 436 AM CST Wed Feb 20 2019/

SHORT TERM (Today through Thursday)...
A cool morning with low clouds across the eastern two-thirds of the
area and high clouds over the northwest part of the region will be
changing for a different scenario this afternoon. Warmer temperatures
in the mid to upper 60s are expected this afternoon while low clouds
erode with some lingering high clouds mainly across the northwest
portion of South Central Texas.

Clouds return late tonight into Thursday morning over most areas.
There is a slight chance for showers across the far southeast portion
of the area and the Coastal Plains around dawn or the Thursday
morning commute. Chances for showers increase and expand to the north
and west to affect areas along and east of Interstate 35 on Thursday
afternoon.

LONG TERM (Thursday Night through Tuesday)...
By Thursday night into Friday morning, an upper level disturbance is
forecast to move across the area to produce light showers, drizzle
and patchy to areas of fog. As the morning progresses, an upper low level
system is forecast to move across northern Mexico and then into west
Texas by Saturday morning. In the meantime, ahead of this system,
several short-wave disturbances are expected to move across the area
over the warm sector/high humidity area. If the cap erodes with this
added instability, there could be isolated thunderstorms across the
Hill Country and over areas east of Highway 77 on Friday afternoon
and evening.

As the upper low level system approaches the area late Friday night
into Saturday morning, showers and isolated thunderstorms are
possible across most areas and especially along and north of Highway
90. A Pacific cold front is expected to move from west to east
overnight/early Saturday. In the wake of the frontal passage, expect
dry weather and breezy conditions with highs in the upper 60s to mid
70s.

Dry weather continues into Sunday but chances for rain return early
next week for areas along and east of Interstate 35.

FIRE WEATHER...
Due to the breezy conditions and low relative humidity expected in
the wake of the Pacific front, elevated to near critical fire weather
conditions are anticipated Saturday afternoon for areas along and
west of Interstate 35.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              65  43  59  51  66 /   0  10  20  40  60
Austin Bergstrom Intl Airport  65  42  59  52  67 /   0  10  20  40  60
New Braunfels Muni Airport     66  43  60  52  68 /   0  10  10  40  50
Burnet Muni Airport            62  41  58  49  64 /   0  -   10  40  60
Del Rio Intl Airport           66  46  69  53  73 /   0  -   10  10  20
Georgetown Muni Airport        63  41  58  50  65 /   0  10  20  40  70
Hondo Muni Airport             68  43  64  53  70 /   0   0  -   30  30
San Marcos Muni Airport        66  42  60  52  68 /   0  10  20  40  50
La Grange - Fayette Regional   63  43  58  53  71 /   0  20  40  40  60
San Antonio Intl Airport       67  45  61  53  68 /   0  -   10  40  40
Stinson Muni Airport           67  45  62  54  69 /   0  -   10  40  40

&&

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

&&

$$

Aviation...Runyen
Short-Term/Long-Term...Oaks
Public Service/Data Collection...33



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