Friday, November 13, 2020

Nov. 13 20

 Summary: Low white to grey stratus clouds covered the whole and sometimes only most of the sky, where I was in the Houston and Galveston, TX area, during the morning and early afternoon. Low white to grey stratus clouds looked to cover most of the sky, where I was in the Houston, TX area, during the mid and late afternoon, evening, and maybe night. The wind speeds felt to be calm with light gusts. It felt a little cool, during the morning and early afternoon. It felt warm, during the mid and late afternoon, evening, and night. On and off light drizzle and rain followed my friends and me from Galveston to west Houston, TX, during the early afternoon. I did not see or feel any more rain drops after that. There looked to be a light to possibly dense fog in and around the Houston, TX area, during the early and mid-morning. Light drizzle and light to moderate rain showers looked to be scattered across the Houston, TX area, during the late morning and afternoon. 

Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 132351
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
551 PM CST Fri Nov 13 2020

.AVIATION...
VFR ceilings across the area this evening with some spotty -ra
west of Interstate 45. Look for some sct lower cloud decks to
eventually develop with moist srly llvl flow. Possibility that
we`ll eventually see some MVFR ceilings develop toward/after
midnight along w/ some patchy fog. Not overly confident of
widespread low visibilities considering higher winds above the
surface should keep some mixing in place...but will monitor
trends. Isolated areas of -ra are possible again after 9z or so
with better chances across n/nw areas (CLL/UTS). Could
theoretically add VCSH`s for several locations into Sat, but will
limit them to those terminals for now considering uncertainly and
overall insignificance. VFR conditions from mid-late morning
onward along w/ 10-20kt southerly winds.  47


&&

.PREV DISCUSSION... /ISSUED 320 PM CST Fri Nov 13 2020/
A handful of showers are popping up this afternoon over the Gulf
waters and parts of Southeast Texas. We`ll continue to see these
chances through the first half of the weekend, but a cold front on
Sunday will bring in much drier, and modestly cooler air to start
the new week.

Fair weather will dominate most of the new week. Temperatures will
be closer to seasonal averages early, but slowly warm through the
week. This will become more apparent towards the end of the week,
when winds turn more onshore and increase the flow of Gulf air
into Southeast Texas.

SHORT TERM [Through Saturday Night]...
The return onshore winds/deeper moisture from the Gulf will help
with the development of low clouds/patchy fog across SE TX later
tonight through early tomorrow morning. Some of the fog could be
dense as winds decrease overnight. However, we conditions may be
faster to improve tomorrow morning as the S/SE winds strengthen.
Warm and humid overnight with lows expected in the mid and upper
60s inland and around 70 closer to the coast.

WAA-type showers over the coastal waters/counties tomorrow morning
should mix out with the low clouds/fog by the afternoon. But can`t
really rule out additional isolated activity continuing on through
the afternoon further inland. Otherwise, the unseasonably warm max
temperatures are forecast once again tomorrow...with highs ranging
in the lower to mid 80s.

LONG TERM [Sunday Through Friday]...
Look for the cold front to be entering the area from the
northwest early Sunday morning, and cross the area through the day
on Sunday. Look for the best chance of rain to come on/very near
the front where moisture pools the most. There`s a small chance of
some embedded lightning near the coast where the front is in the
afternoon and we have the best potential for a little instability
to build. However, with a ridge already beginning to build back
aloft and southwest flow, I suspect we`ll probably be too capped
for much - if anything - in the way of thunderstorm development.

In the wake of that front, we`ll have considerably drier and
modestly cooler air move into the area and stay in place for much
of the coming week. There actually looks to be a pretty solid mass
of Canadian air dropped into the North Central US with the
northern stream trough, but...that aforementioned ridging already
building in will put a pretty solid block on us seeing any of it.
Both the Euro and GFS build in a ridge as low as 850 mb as early
as Sunday evening. High pressure even slides in faster than folks
slide into the DMs after a particularly great Instagram photo. So,
we`ll get a short window for cold advection behind this front, but
this window seems to be getting shorter with every model run.

Because of this, don`t look for temperatures to get super cold,
but we`ll at least look to get into the ballpark of seasonal
averages, and should give us a break from highs in the 80s for a
fair chunk of the new week. Of course, with a stacked ridge in
control, look for a determined, albeit gradual, increase in
temperatures through the week. The warming trend should pick up
more in the back half of the week as low level onshore flow
resumes, boosting warm, humid Gulf air back across the area.

MARINE...
Patchy fog will remain a possibility on the Bays and very near
shore over the Gulf tonight and tomorrow night until a weak cold
front arrives Sunday to scour out enough moisture to end potential
for fog. There is a possibility for some fog to be dense, but is
not expected to be widespread at all. Additionally, showers and
thunderstorms over parts of the waters will also be possible until
the front sweeps through.

Behind the front, look for stronger northeasterly winds to pick
up. SCEC-level winds seem likely. The need for a small craft
advisory looks less likely, but is probably still a plausible
worst case scenario at this time. Those northeasterly winds should
continue for much of the week, but diminishing in strength after
Monday. Towards the end of the week, onshore flow is expected to
return.

TROPICAL...
In addition to Tropical Storm Theta in the Eastern Atlantic,
Tropical Storm Iota has now formed in the central Caribbean Sea.
It is expected to strengthen into a hurricane by early next week,
and become a major hurricane just before landfall in Central
America. This storm poses no threat to Southeast Texas in the
foreseeable future.

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      69  84  63  75  47 /  10  20  20  10   0
Houston (IAH)              69  83  68  79  53 /  20  10  10  30   0
Galveston (GLS)            71  80  71  80  63 /  20  10  10  30   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.

&&

$$

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