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

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FXUS64 KEWX 300627
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
127 AM CDT Sun Apr 30 2017

.UPDATE...
Winds have decreased allowing the wind advisory expire. Areal
coverage of showers and storms has increased, so POPs have been
increased overnight. Otherwise, only minor updates of temperatures,
dewpoints and winds is needed for the remainder of tonight.

&&

.PREV DISCUSSION... /ISSUED 1248 AM CDT Sun Apr 30 2017/

AVIATION.../06Z TAFS/
Elevated showers and thunderstorms with cloud bases above 6000 feet
continue to develop behind the cold front as the upper level low
ejects to our northwest. Thus, have added in TSRA for SAT and VCTS
for SSF until 615-630Z with main impacts being a brief period of
frequent lightning and pea size hail with wind gusts remaining below
30 knots. This activity will continue to move NE towards AUS at
around 40-50 knots, so VCTS has been added there between 615-800Z.
Once these storms push out of the I-35 terminals over the next few
hours, the main weather impact will be northwest winds gusting to 25
knots through mid-afternoon tomorrow before gradually subsiding later
tomorrow afternoon at all sites as the pressure gradient relaxes and
high pressure moves into the area. VFR conditions will persist with
skies clearing at the I-35 sites by sunrise.

PREV DISCUSSION... /ISSUED 1055 PM CDT Sat Apr 29 2017/

UPDATE...
Just sent an update to cancel Severe Thunderstorm Watch 177 for
Karnes and Wilson counties.

PREV DISCUSSION... /ISSUED 943 PM CDT Sat Apr 29 2017/

UPDATE...
We just cleared all counties previously in Severe Thunderstorm Watch
#177, but added Wilson and Karnes counties for the storms still in
those areas. The watch will still end on time at 11 pm. We expect the
strong pressure gradient which developed from the low pressure
produced by strong convection ahead of the cold front, and the high
pressure of the colder/drier air moving in behind the cold front.
This resulted in gusty, non-thunderstorm wind gusts up to 50 mph. A
wind advisory is in effect through 1 am, generally along and west of
I-35, to cover this until the pressure gradient relaxes as the front
and storms move to the east.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              52  85  62  88  71 /   0   0   0   0  20
Austin Bergstrom Intl Airport  48  85  60  88  70 /   0   0   0   0  20
New Braunfels Muni Airport     49  86  59  88  70 /   0   0   0   0  20
Burnet Muni Airport            47  84  60  86  68 /   0   0   0   0  10
Del Rio Intl Airport           52  91  63  90  70 /   0   0   0   0  -
Georgetown Muni Airport        49  84  61  87  69 /   0   0   0   0  20
Hondo Muni Airport             49  89  58  90  70 /   0   0   0   0  10
San Marcos Muni Airport        49  86  60  88  70 /   0   0   0   0  20
La Grange - Fayette Regional   49  84  60  87  71 /   0   0   0  -   20
San Antonio Intl Airport       52  87  61  89  71 /   0   0   0   0  10
Stinson Muni Airport           51  88  61  89  71 /   0   0   0   0  10

&&

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

$$

Mesoscale/Aviation...LH
Synoptic/Grids...04



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