#5076 Postby weatherdude1108 » Wed Jan 10, 2018 4:53 pm
385
FXUS64 KEWX 102051
AFDEWX
Area Forecast Discussion
National Weather Service Austin/San Antonio TX
251 PM CST Wed Jan 10 2018
.SHORT TERM (Tonight through Friday Night)...
Much of the low clouds from early this morning have dissipated by
mid-afternoon with partly cloudy skies mainly along and east of
Interstate 35. Clouds have cleared out the Rio Grande area with sunny
skies expected through early Thursday morning.
A cold front currently pushing across west Texas is forecast to move
to the east this evening and overnight and then across south central
Texas on Thursday. The cold front is expected to move across the Rio
Grande and southern Edwards Plateau around 6 through 8 am Thursday,
along the I-35 corridor from 9 am through 11 am and along and east of
Highway 77 from 11 through 1 pm in the afternoon.
Patchy fog and light drizzle is expected ahead of the frontal
boundary mainly across the coastal Plains overnight/early Thursday morning.
Along the I-35 corridor and southern Edwards Plateau (basically
areas along the escarpment), MOS/LAMP guidance and forecast soundings
are suggesting areas of fog (can`t rule out areas of dense fog for
few hours) to develop overnight/early Thursday morning before the
arrival of the front/wind shift.
As the strong cold front pushes across the area on Thursday, breezy
to windy conditions are expected across the area with gusts of 30 to
40 mph. There is a slight to low end chances for rain along and east
of Highway 77 mid morning Thursday before the cold front clears the
area.
A Wind Advisory is likely to be issued later tonight for much of the
area if model guidance continue with the windy conditions trend.
Due to the moderate to strong northwest to north winds and relative
humidity values in the low to upper 20 percent range across the
western half of south central Texas on Thursday, we will call for
elevated fire weather conditions over that region.
In the wake of the front, a dry and cold airmass will spread across
the area on Friday with lows in the lower 30s across the Hill Country
to mid 30s across the coastal Plains. Friday`s high temps in the
upper 50s to low 60s expected.
&&
.LONG TERM (Saturday through Thursday)...
The upcoming weekend will be cold as another but stronger and colder
airmass pushes across the area. Things slowly warm up on Monday of
next week with the return of a moist and southerly flow. Chances for
rain increase late Monday into Tuesday as a weak cold front slowly
moves across the area. There are some differences with the timing of
the cold front with GFS being the slower solution versus a faster
frontal boundary output from the ECMWF. Wintry precipitation is not
out of the question across some parts of the Hill Country for this
particular period (based on latest guidance), however, many model
runs to go. Stay tuned.
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