#743 Postby weatherdude1108 » Wed Dec 06, 2017 4:53 pm
EWX stated they have a "very complicated short term period". I don't know the last time the Austin area saw snowflakes before Christmas. Anyone know? Not to say it will happen tomorrow. If it does, won't stick. It was in the 80s on Monday.
Area Forecast Discussion
National Weather Service Austin/San Antonio TX
341 PM CST Wed Dec 6 2017
.SHORT TERM (Tonight through Thursday Night)...
A very complicated short term period in regards to winter weather
prospects overnight and through Thursday. The rain shield currently
observed across South Central Texas will evolve to include snow mixed
in this evening and overnight for locations mainly on the Plateau and
Hill Country but could reach as far east as the I-35 corridor.
Exhaustive interrogation of forecast soundings have not made things
much easier either. While surface temperatures will struggle to fall
due to an extensive cloud shield over the region, they will come very
close to the freezing threshold across western Val Verde, much of
Edwards and Real counties, and into Gillespie and Kerr counties.
However, low level temperature profiles have been trending colder
lending more credence to the possibility for snow/rain mix, and
perhaps even all snow for periods of time after midnight until
daybreak for these same areas. Farther to the southeast, reaching the
I-35 corridor, rain should be the most dominant precip type, but
still cannot rule out some snowflakes mixed in as well.
Regardless, with surface temperatures likely to hover at or just
above freezing for these areas, and still quite a bit above freezing
elsewhere, little to no accumulations are expected. If accumulations
do occur, they will likely be dustings at best, likely in far western
Val Verde and across our northern CWA border to Gillespie county.
Perhaps more of a concern is any standing water due to today`s
rainfall activity freezing on bridges and overpasses where
temperatures will be the coldest, again in the Hill Country and
Plateau areas.
Tomorrow morning, some folks may wake to find a few snowflakes still
before transitioning back to all rain late in the morning and into
the afternoon hours. The rain shield is expected to push slowly
southward over the course of the day and likely south of San Antonio
shortly after the noontime hour. Have trended PoPs down over the
course of the day tomorrow closely following the trends of the TTU-
WRF and HREF.
Even colder temperatures are expected Thursday night and overnight
into Friday morning and if lingering rain activity continues in the
southern zones when temperatures begin to fall to near freezing, some
wintry mix could be seen in our southwestern zones, but again, no
accumulation is expected at this time.
&&
.LONG TERM (Friday through Wednesday)...
As the shortwave responsible for this cold front passes over Friday,
it will begin a trend of warming through the weekend, reaching highs
in the 60s over the weekend and through the first half of next week.
By mid week, a broad and weak low over the Gulf of California is
expected to slowly traverse over the US/Mexico border. While a dry
forecast is expected through the week during this transition, our
next best shot at PoPs could be Friday as this low further weakens
into a shortwave as it passes over Texas.
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