Tuesday, October 6, 2020

Oct. 6 20

 A long wide and grey stratus cloud looked to be on the horizon on my way to work from Northwest Houston, TX to the Heights area, during the early morning. The sky became clear with a possible thin white layer of alto stratus cloud, where I work in the Heights area, sometime during the mid, or late morning. The sky looked to be clear with a thin white layer of alto stratus cloud, where I work in the Heights area, during the early and mid-afternoon. The sky looked to have become clear, where I work in the Heights area, sometime during late afternoon, or early evening. The sky looked to be clear, where I work in the Heights area and in west Houston, TX and Katy, TX, during the late evening. The sky looked to be clear in Katy, TX and Northwest Houston, TX, during the early night. The sky looked to be clear, at my house in northwest Houston, TX, during the late night. It felt cool, almost cold, during the early morning. It started to warm up during the mid-morning. It felt warm during the late morning. It felt very warm during afternoon. It felt warm during evening. It started to feel cool, during the early night. It felt cool, during the early night. The wind speeds were calm with some possible occasional moderate gusts. There was a 0 percent chance for rain for the Houston, TX area. I did not see, or feel any rain drops where I was during the day. I did not hear about or see any rain anywhere in the Houston, TX area, during the day.

Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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148
FXUS64 KHGX 062329
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
629 PM CDT Tue Oct 6 2020


.AVIATION [00Z Issuance]...
VFR conditions are expected through the period with light north
to northeast winds. A FEW to SCT high clouds will move through the
region on Wednesday, becoming more SCT/BKN along the coast
towards the end of the TAF period. 05

&&

.PREV DISCUSSION... /ISSUED 355 PM CDT Tue Oct 6 2020/

SHORT TERM [Through Wednesday Night]...

The short term discussion will be rather short as the meat of this
forecast will be taking place in the Long and Marine discussions
below as they deal with Hurricane Delta.

High pressure will continue to bring mostly clear skies through the
rest of today and into early tomorrow afternoon. Clouds will begin
to creep in from the Gulf as tropical moisture from the remnants of
Gamma and from Hurricane Delta begin to approach the area. No chance
of precipitation is expected through the short term period over
land, but some isolated showers and thunderstorms are possible in
the far offshore waters.

Overnight lows tonight will be similar to the past few with
temperatures in the upper 50s north of I-10, around 60 along I-10
and near the City of Houston, and in the upper 60s to low 70s along
the coast. Because of the increasing moisture tomorrow night,
temperatures will run about 10 degrees warmer inland (mid to upper
60s across the area), but only a few degrees along the coast (still
in the low 70s). High temperatures tomorrow will be in the mid to
upper 80s across the area.

Fowler

LONG TERM [Thursday Through Tuesday Night]...

Thursday will begin the day of seeing the effects of Hurricane
Delta. Winds will be northeasterly, increasing through the day to 15-
20mph along the coast with some higher gusts. Rain chances also
increase through the day with southeastern counties reaching POPs
of about 35. By Friday evening, the chances peak in the 60s but
quickly decrease as Delta moves out on Saturday. Coastal flooding
will be one of our bigger concerns for the rest of the week. While
it is still too early to tell the exact landfall location, flood
prone areas should begin to take precautionary measures and continue
to monitor the progress of Hurricane Delta. Beach hazards will also
be a factor with the increasing risk of rip tides along the coast as
Hurricane Delta moves by the area.

For the most part, improvement will be seen fairly quickly as Delta
makes landfall over the northwest Gulf of Mexico and turns
northeasterly. As early as Friday night, winds should begin to calm
and become more northwesterly and seas will begin to subside which
will decrease the risk of rip currents, though, I would suspect the
risk will be see through the weekend. Conditions will continue to
improve over the weekend and winds will be shifting southeasterly
and a cool front approaches the area on Monday night or Tuesday
morning. Timing of this is making some higher temperatures over the
weekend. Some areas could get in the 90s over the weekend just
enough to remind is that it`s SE TX.

35

MARINE and TROPICAL...

Will maintain caution flags for the 20-60nm group for borderline 15-
20kt winds tonight. Webcams are not overly spectacular in regards to
the surf along the coast at the moment and beach patrol has lowered
their flags to yellow from red, so will cancel the rip statement
this evening and reevaluate things in the morning.

Hurricane Delta will make its way from the Yucatan toward the
northwest Gulf the next couple days as a major hurricane. It should
eventually start feeling an upper trof, increased wind shear and
cooler water temps and begin taking a gradual north then northeast
turn before making landfall as a dangerous hurricane Friday across
the northern Gulf coast.

Though wind speeds may weaken a touch before doing so, it should NOT
be focused upon. Reason being, the overall wind field will probably
expand in overall area with impacts more widely distributed. This is
opposite of what Laura did. Think of the wind field like an ice
skater...he/she spins faster as arms lift and up & contract. Putting
arms out, they begin slowing down but surface area expands. Impacts
can be worse across a larger area with a large strong hurricane than
a more compact tighter intense/extreme hurricane.

Location specific impacts a bit too early to pin down, but even if
the "center" of the hurricane tracks to the east of the upper Tx
coast, tropical storm force winds remain a possibility locally and
outside of the forecast cone which depicts where the center itself
will be 67% of the time. The cone itself will shrink with time as
average historical forecast errors are lower. The cone doesn`t imply
where impacts will be confined.

So based on the data and forecast at the current time, expect:
- Seas: building thru the day Thurs into Fri, possibly peaking in
the 15-20ft range.

- High surf and high risk of rip currents during the same period.

- Water levels increasing. Too early to say how much, maybe 2 ft
above normal if we remain on the west side of the axis. However,
significant wave runup is anticipated on top of that. Increasing
concern of coastal flood potential for Gulf facing locations Thurs
evening into Sat morning. North facing shorelines (Galveston &
Bolivar) may not be immune from flooding either if strong
north/northwest winds develop and push water on the back end closer
to landfall too.

- Winds: Small craft advisories are a given Thurs. Chances for
sustained tropical storm force winds over portions of the upper Tx
coastal waters appear to be increasing. Should this occur, mostly
likely onset time would be Friday. Tropical storm watches may be
required Wed morning.

47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      87  58  87  63  87 /   0   0   0  10  20
Houston (IAH)              86  60  87  69  88 /   0   0  10   0  30
Galveston (GLS)            82  71  83  74  84 /   0  10  20   0  30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...High Rip Current Risk until 9 PM CDT this evening for the
     following zones: Brazoria Islands...Galveston Island and
     Bolivar Peninsula...Matagorda Islands.

GM...NONE.
&&

$$

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