Sunday, October 11, 2020

Oct. 11 20

 Only a few alto stratus clouds looked to be scattered across the sky, through my travels through northwest, west, and southwest Houston, TX, Missouri City, And Katy, TX, during the morning, afternoon, and evening. The sky looked to be clear, at my house in northwest Houston, TX, during the night. I think there was some light to possibly dense fog in the Houston, TX area, during the early morning. There was an o percent chance for rain for the Houston, TX area. I did not hear about or see any rain anyhwere in the Houston, TX area. The wind speeds were light with some moderate gusts. The day felt warm in the morning, evening, and night. It felt very warm/hot during the afternoon. 

Thoughts: Very warm today with some possible record highs. I waiting to hear about some good rain chances. But it does not look like Houston, TX will see any good rain in awhile.

Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 112333
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
Issued by National Weather Service Corpus Christi TX
633 PM CDT Sun Oct 11 2020

.DISCUSSION...Updated aviation discussion for 00z TAF cycle.


&&

.AVIATION...

VFR conditions will continue through the evening. Shallow low-
level moisture will produce MVFR and IFR cigs and vsbys after
misnight, with most significant impacts around daybreak.
Conditions will resume VFR by mid-morning. A weak and dry cold
front will move through the terminals Monday afternoon and
evening. Winds will progress to west, northwest, and north from
northwest to southeast through the region. Areas along the
immediate coast will be the last to see the wind shift. Expect
clearing skies and light NW-N winds by the end of the period.

&&

.PREV DISCUSSION... /ISSUED 400 PM CDT Sun Oct 11 2020/

SHORT TERM [Tonight through Tuesday Night]...

After today`s unseasonably warm weather, our attention turns again
this evening to the potential for fog development across SE Texas.
Latest NAM forecast soundings indicate favorable near-surface
saturation, with 2m dewpoint differentials expected to reach 1-3
degF at most locations by midnight. Furthermore, 15Z SREF
probabilistic guidance supports reduced visibilities across much
of the greater Houston area during this time. However, development
may be hindered given the slightly stronger winds tonight
compared to yesterday. While these conditions may not amount to a
Dense Fog Advisory as we saw early this morning, would be
surprised not to see some areas of fog present by the early
morning hours.

Another summer-like day is in store on Monday as surface high
pressure remains in place behind the departure of the former
Hurricane Delta. Guidance continues to indicate warm temps (~21-23
degC) at the 850mb level, and have agreed with latest suite of
national blends in showing most inland locations reaching the low
90s by tomorrow afternoon. Continued onshore flow will keep dew
points in the low 70s, which will result in heat indicies hitting
the upper 90s tomorrow afternoon. As such, it will be important to
keep heat safety in mind if you have any outdoor activities or
work planned. We continue to anticipate the approach of a weak
cold front on Monday night, though questions remain regarding
exactly how far it will push south given the relatively weaker
surface high over the south- central CONUS. Nonetheless, the
passage of this boundary will be a dry one with a brief shift to
northerly winds bringing down dew points to more comfortable
levels across the northern half of the CWA by Tuesday morning. A
slight decrease in 850mb temperatures by Tuesday afternoon should
keep daytime highs in the upper 80s.

Cady

LONG TERM [Wednesday Through Sunday]...

Onshore flow quickly redevelops heading into Wednesday as surface
high pressure shifts off to the east. Seasonably warm conditions
continue through Thursday with highs at most inland locations
expected to reach the upper 80s with a relative lack of cloud
cover allowing for fairly uninhibited daytime surface heating. Our
main concern in the extended period continues to be the approach
of a second, stronger cold front on late Thursday. While the trend
of a faster FROPA continues across global deterministic model
sol`ns, the expected impacts of this boundary passage remain the
same. The front itself should reach the Brazos Valley/northern
zones just after sunset on Thursday, pushing through the Houston
metro overnight and reaching the coast by early Friday morning.
ECMWF continues to favor more precipitation coverage along the
boundary compared to the GFS, and as a result have continued to
compromise with slight chance to chance PoPs overnight. Moderate
to strong north flow develops in the wake of the front, with dew
points dipping into the 40s-low 50s by Friday and afternoon highs
dropping into the 70s. Remainder of the weekend looks to be cool
and "fall-like", though a redevelopment of onshore flow by Sunday
as surface high pressure pushes off to the east will drive a
warming trend as the subsequent work week begins.

Cady

AVIATION [18Z TAF Issuance]...

Continue to expect VFR conditions with light/moderate S wind
expected this afternoon/evening, with a transition to IFR/LIFR
ceilings/MVFR visibilities/light S/SW wind 09-13z Monday. Expect
mainly W/SW flow and mainly MVFR ceilings for the 13-15z Monday
period, then NW/W flow MVFR/VFR ceilings 16-18z Monday.

99

MARINE...

Fog development remains a concern this evening across the bays
given the expected low dew point differentials and relatively
light winds. Otherwise, light to moderate winds and lower wave
heights will continue through mid-week. Two surface cold fronts
will approach the coastal waters this week. First, a weak boundary
is expected to push offshore early on Tuesday, bringing with it a
brief northerly wind shift but no precipitation. A second, stronger
cold front arrives late Thursday night. This front will bring a
wind shift to the north and result in increasing seas to around 5
to 7. A Small Craft Advisory will likely be required in the wake
of the front.

Cady

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      69  91  63  88  63 /   0   0   0   0   0
Houston (IAH)              72  93  69  89  67 /   0   0   0   0   0
Galveston (GLS)            77  86  74  83  73 /   0   0   0   0   0

&&

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

$$

Discussion...99
Aviation/Marine...99

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