Houston, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

603
FXUS64 KHGX 100437
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1137 PM CDT Sat Aug 9 2025

...New KEY MESSAGES, DISCUSSION, MARINE...

.KEY MESSAGES...
Issued at 1137 PM CDT Sat Aug 9 2025

- Increased chances for showers/storms early this week with the
  highest chances still near and south of I-10.

- Slightly lower daytime temperatures early this week, but
  temperatures/heat indices increase midweek and beyond.

- Rain chances gradually decrease through the work week, but the
  potential remains for daily isolated to scattered showers/storms
  mainly south of I-10.

&&

.DISCUSSION...
Issued at 1137 PM CDT Sat Aug 9 2025

I wanna know...have you ever seen the rain? Oh you have? Every day?
Yeah that checks out...whelp rain chances will be even higher Sunday
and Monday as an upper level disturbance moves in along the
coast. Rain chances will still be highest near and south of I-10,
but we could see a few rogue storms make their way further north.
As we saw on Saturday afternoon, the strongest storms will be
capable of producing locally heavy rainfall, gusty winds, and even
small hail at times. Those gusty winds can extend away from
thunderstorms as outflow boundaries become abundant. If you have
any outdoor plans on Sunday, you may want to have an idea of
where to take cover from the rain and/or lightning especially if
you are south of I-10. Rain chances remain elevated going into
Monday as PVA from the upper level disturbance lingers over the
area. On the plus side, this means that temperatures will be a tad
bit cooler with highs mainly in the low to mid 90s.

We lose out on the upper level disturbance after Monday, but we
remain generally in a trough-y pattern for most of the work week.
This means that chances for isolated to scattered showers and
storms during the afternoons near and south of I-10 will continue.
These rain chances will be on a gradual decreasing trend though. In
the summertime, rain chances and temperatures have an inversely
proportionate relationship...so decreasing rain chances means
increasing temperatures! Expect temperatures to gradually increase
around midweek and beyond as we head back towards the mid to
upper 90s. Heat indices may flirt with the advisory threshold at
times towards the end of the work week as model guidance suggests
the return of mid to upper level high pressure over the
southeastern CONUS extending westward along the Gulf coast.

Long story short: Hot and humid weather pattern continues with
daily chances for showers/storms persist for the foreseeable
future.

Batiste

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 620 PM CDT Sat Aug 9 2025

TSRA activity this evening is generally moving away to the west from
our TAF sites. We will still need to monitor the radar closely in
case an isolated TSRA develops. But we think the TSRA threat from
00Z onward is pretty low. Mostly VFR conditions expected
overnight. However, localized IFR/MVFR cigs and vis likely once
again, especially in locations that received SHRA/TSRA today and
in areas that have seen AM fog in recent days. SHRA/TSRA activity
is expected to develop near the coast during the morning hours
before pushing inland late morning into the afternoon. TSRA
appears isolated. Therefore, only PROB30s were used to indicate
the TSRA threat from IAH to the coast. We do have VCSH south of
I-10 to indicate the potential for higher SHRA coverage. Winds
will generally be light and from the E to SE. But locally higher
winds expected in the vicinity of TSRA.

&&

.MARINE...
Issued at 1137 PM CDT Sat Aug 9 2025

Light to occasionally moderate onshore flow and low seas will
persist throughout the week. Daily chances for isolated to
scattered showers and storms continue with activity initiating
over the Gulf waters during the morning hours, then moving inland
in the late morning/afternoon hours. Winds and seas could be
locally higher in and around any of the stronger storms. Rain
chances will be elevated early this week as an upper level
disturbance moves in, but expect daily chances for showers/storms
to persist throughout the forecast period. Towards the end of the
work week, onshore flow increases leading to wave heights in the
Gulf increasing to 3-5 ft.

Batiste

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  97  75  96  75 /  20  10  10  10
Houston (IAH)  95  77  94  78 /  60  10  30  20
Galveston (GLS)  93  82  90  82 /  20  30  50  30

&&

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

$$

DISCUSSION...Batiste
AVIATION...Self
MARINE...Batiste