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

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FXUS64 KEWX 130951 AAA
AFDEWX

Area Forecast Discussion...UPDATED
National Weather Service Austin/San Antonio TX
451 AM CDT Fri Oct 13 2017

.UPDATE...
We have added additional counties to the Dense Fog Advisory earlier
issued. The dense fog continues to spread to the north early this
morning and expected to reach much areas east of Interstate 35.
Visibility is expected to improve by 9 am this morning.

&&

.PREV DISCUSSION... /ISSUED 254 AM CDT Fri Oct 13 2017/

SHORT TERM (Today through Saturday)...
A warm and humid overnight period has led patchy to dense fog areas
to develop across the coastal plains and parts of the southeast
counties. We have issued a Fog Advisory for areas east of La Grange
to Gonzales to Kenedy line through 9 am this morning. Will monitor
closely the situation and include more counties to the Fog Advisory
later on, if necessary. Otherwise, partly cloudy to mostly sunny
skies are expected today once the fog lifts. High temperatures are
expected to reach the upper 80s to lower 90s. Increased moisture from
the Gulf of Mexico is expected to bring once again fog conditions
across much of South Central Texas late tonight into Saturday
morning. Dry conditions are expected for Saturday with daytime
temperatures one or two degrees cooler than today`s highs as clouds
remain over the area for much of the morning period.

LONG TERM (Saturday Night through Thursday)...
The subtropical high that has kept the area dry and warm the last
several days, is forecast to push to the east this weekend and
allows an upper level short wave to move across the Southern Plains
late Saturday into Sunday. A cold front associated with the upper
level disturbance is forecast to push across South Central Texas
around dawn Sunday morning and exit by mid Sunday afternoon.

The GFS and ECMWF are in fair to good agreement with the position and
timing of the cold front moving across South Central Texas. The same
goes for the quantity of estimated storm total rainfall with areas
getting few hundredths to one quarter inch. Can`t rule out few places
getting one half inch of rain.

A dry and cooler airmass will spread across South Central Texas
through at least the middle of next week with lows in the 40s across
the Hill Country the mornings of Tuesday and Wednesday. Temperatures
will warm back up to climate normals for the latter part of the
week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              90  71  89  68  74 /   0   0  -   10  50
Austin Bergstrom Intl Airport  89  69  88  68  76 /   0   0  -   10  40
New Braunfels Muni Airport     89  70  88  69  78 /   0   0  10  -   40
Burnet Muni Airport            88  68  87  64  70 /   0   0  -   20  50
Del Rio Intl Airport           88  72  87  69  75 /   0   0  -   10  40
Georgetown Muni Airport        89  69  89  66  72 /   0   0  -   10  50
Hondo Muni Airport             89  71  88  69  79 /   0   0  -   10  40
San Marcos Muni Airport        90  70  89  69  76 /   0   0  10  -   40
La Grange - Fayette Regional   90  70  90  70  80 /   0   0  10  10  30
San Antonio Intl Airport       89  72  88  70  78 /   0   0  10  -   40
Stinson Muni Airport           90  72  90  71  80 /   0   0  10  10  40

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 9 AM CDT this morning for the following
counties: Atascosa...Bastrop...Caldwell...De Witt...Fayette...
Gonzales...Guadalupe...Karnes...Lavaca...Lee...Wilson.

&&

$$

Mesoscale/Aviation...Hampshire
Synoptic/Grids...17



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