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

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914
FXUS64 KEWX 261738
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
1238 PM CDT Fri May 26 2017

.AVIATION...
CIGs have dissipated at DRT and will be VFR through the afternoon and
evening. We should see VFR conditions in Austin and San Antonio
within the next hour or two and then continuing through the afternoon
and evening. Low CIGs will develop again overnight at all terminals.
We expect CIGs to drop to IFR in Austin and San Antonio. Improvement
Saturday will be similar to today.

&&

.PREV DISCUSSION... /ISSUED 432 AM CDT Fri May 26 2017/

SHORT TERM (Today through Saturday)...
Increased moisture across most areas overnight will continue to keep
cloudy skies through early this afternoon. A warmup is on the way
for the afternoon period as temperatures reach the lower to mid 90s
across much locations and up to 104 degrees across the southwest
counties. Dewpoint temperatures are forecast to be in the lower to
mid 70s this afternoon. This combination will bring heat index values
between 105 to 110 for Atascosa and Frio counties and up to 114 for
the southwest counties. A Heat Advisory is in effect from 1 PM
through 7 PM for those areas.

Clouds return late evening continuing through Saturday with lows in
the upper 70s much places. Once clouds dissipate, another warm day is
in store with maximum temperatures reaching the mid 90s and near 100
degrees for the southwest counties. There may be isolated storms to
the north of Del Rio late Saturday afternoon ahead of a dry-line.
More storms are expected to develop in the evening as the dry-line
pushes back to the northwest and into the Big Bend area. Some storms
could become strong to severe mainly affecting the southern Edwards
Plateau. Main weather hazards will be large hail and damaging winds.

LONG TERM (Saturday Night through Thursday)...
There is a break from storm activity late Saturday night into Sunday.
However, storms return for Sunday afternoon and evening as a cold
front slowly pushes south into our area. A second round of strong to
severe thunderstorms is anticipated across most of the area. Also,
heavy rain is expected during the period especially across the
Edwards Plateau and Rio Grande Plains. Main weather hazards will be
large hail, damaging winds and localized flash flooding.

The cold front is forecast to stall and then dissipate across the
area by Monday. However, an active weather pattern is in store for
much of next week as short-wave disturbances move over the area and
remnant of the cold front or old outflow boundaries will combine with
surface moisture for the redeveloping of showers and storms mainly
in the afternoon and early evening hours.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              77  95  75  91  70 /  10  -   10  30  60
Austin Bergstrom Intl Airport  76  95  75  92  70 /  10  10  10  20  60
New Braunfels Muni Airport     76  95  76  92  70 /  10  10  10  20  60
Burnet Muni Airport            75  94  73  88  67 /  10  -   20  40  60
Del Rio Intl Airport           78  98  77  93  72 /  -   10  20  40  70
Georgetown Muni Airport        76  94  75  90  68 /  10  -   10  40  60
Hondo Muni Airport             77  96  76  92  71 /  -   -   10  20  60
San Marcos Muni Airport        77  94  76  91  70 /  10  10  10  20  60
La Grange - Fayette Regional   77  95  77  92  72 /  10  -   10  20  60
San Antonio Intl Airport       77  96  76  92  71 /  10  10  10  20  60
Stinson Muni Airport           77  96  77  93  72 /  10  -   10  20  60

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for the following
counties: Atascosa...Dimmit...Frio...Maverick...Zavala.

&&

$$

Mesoscale/Aviation...05
Synoptic/Grids...24
Public Service/Data Collection...YB



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