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National Weather Service Forecast Discussion

075
FXUS64 KHGX 262336
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
636 PM CDT Sun Jul 26 2026

...New AVIATION...

.KEY MESSAGES...

- Dangerous heat building this week with temperatures in the upper
  90s/100s and heat indices of 104-112F. Heat Advisories likely at
  times during the upcoming work week.

- Patchy fog possible during the early to mid-morning hours for at
  least the next few days.

&&

.DISCUSSION...
Issued at 1253 PM CDT Sun Jul 26 2026

A strong ridge of high pressure building over the Southern Plains
will bring hot conditions all week long with dangerous heat
possible during the afternoon hours. A combination of this high
pressure, abnormally warm temperatures aloft, and daytime heating
will give way to afternoon high temperatures near 100 degrees all
week long for non-coastal areas. Temperatures may peak around
96-99 on Monday, but triple digit highs may begin to appear around
highly urbanized areas by Tuesday with most inland locations
reaching 100-103 degrees by Thursday. Add in the humidity and we
will be seeing heat indicies around 105-108 degrees on Monday and
then 106-110 (or higher) Tuesday through the end of the week.
Urbanized areas (especially the Houston Metro) may see heat
indices higher than 108 degrees on Monday for a couple hours
during the afternoon. A Heat Advisory may be issued during later
shifts for Monday if these higher heat indices are expected to be
more widespread or hotter. The likelihood of a Heat Advisory
become much higher by Tuesday as the dangerous heat become more
widespread.

Rain chance remain near zero for much of this week thanks to
increased subsidence from the dominating high pressure overhead.
This high pressure is forecasted to slide westward by this weekend
allowing for some shortwaves to slide down into East Texas along
the eastern edge of the ridge. This would bring a return of rain
chances by as early as Saturday afternoon and continue into the
start of the following week. But, this is highly dependent on how
far west the high pressure slides. If it stays further east, or is
stronger, then the rain chances would also stay to our east.

Fowler

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 635 PM CDT Sun Jul 26 2026

Expect another cycle of isolated early morning MVFR cigs/vis outside
the metro terminals, which burn off by mid morning. Otherwise, VFR
conditions will prevail. Isolated SH/TS possible for our coastal TAF
sites with the afternoon sea breeze, but confidence remains too low
to warrant a mention in the TAF.

JMG

&&

.MARINE...
Issued at 1253 PM CDT Sun Jul 26 2026

Light to occasionally moderate southerly/southwesterly winds and
2-4 ft seas will prevail for most of this week. No significant
weather concerns expected.

Fowler

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  76  97  76  98 /   0   0   0   0
Houston (IAH)  78  99  78 100 /  10   0   0  10
Galveston (GLS)  83  91  83  92 /   0   0   0   0

&&

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

$$

DISCUSSION...Fowler
AVIATION...JMG
MARINE...Fowler

NWS HGX Office Area Forecast Discussion