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National Weather Service Forecast Discussion

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456
FXUS64 KHGX 242320
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
620 PM CDT Tue Mar 24 2026

...New AVIATION...

.KEY MESSAGES...

- Mid-level high pressure will keep conditions dry and
  temperatures well-above normal over the next several days.

- Persistent southerly flow will lead to the development of
  patchy to areas of fog (some locally dense) and low clouds over
  the next several nights.

- Cooler temperatures are possible over the weekend with the
  passage of a dry cold front.

&&

.DISCUSSION...
Issued at 209 PM CDT Tue Mar 24 2026

The fairly robust ridge that has been placed over western CONUS
the last couple days looks to gradually move eastward, directly
above the Southern Plains, over the next week. This will lead to
persistent conditions over the next several days as large scale
subsidence remains locked in keeping PoPs near nil. Diurnal
heating each day will lead to sea breeze development that will
push low level moisture inland. This moisture then condenses
overnight as temperatures drop and becomes patchy to areas of fog
during the morning hours. Fog then dissipates throughout the mid
to late morning... A wash, rinse, repeat pattern until a mid-level
perturbation rides over the top of the ridge and sends a dry
backdoor cold front into SE TX this weekend. This will change the
low level flow from being east-southeasterly to northeasterly. In
the cold front`s wake a drop in moisture, indicated by dew points
in the 40s and 50s this weekend, will lead to pleasant conditions
with cooler temps in the upper 70s to mid 80s. By early next week
the pattern flips back and southerly flow returns leading to
another warming, and potentially foggy, trend.

&&

.AVIATION...
(00Z TAF Issuance)
Issued at 551 PM CDT Tue Mar 24 2026

The forecast for tonight into tomorrow is a blend of short-term
guidance coupled with persistence forecasting. Therefore, the
outlook for tonight looks similar to last night, with widespread
sub-VFR cigs/vis developing overnight. Some uncertainty regarding
whether or not vis/cigs will become as low for as long as it did
last night. That being said, most location are forecast to drop to
IFR. Conditions should trend back to VFR by mid/late morning
tomorrow, with winds increasing from the S to SE.


&&

.MARINE...
Issued at 209 PM CDT Tue Mar 24 2026

Light to moderate south-southeast winds and seas of up to 3 feet
expected through the rest of the week. Areas of patchy sea fog are
possible over the bays and adjacent nearshore waters during the
next few days generally between the evening to mid-morning hours.
A dry cold front could push through Southeast TX sometime late
Friday or early Saturday, resulting in moderate to strong east
northeast winds and elevated seas in the wake of the front.
Caution Flags and Small Craft Advisories may be needed Friday
night into Saturday. Conditions should improve on Sunday.

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  65  86  64  88 /   0   0   0   0
Houston (IAH)  65  86  64  87 /   0   0   0   0
Galveston (GLS)  68  75  67  77 /   0   0   0   0

&&

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

$$

DISCUSSION...WFO
AVIATION...Self
MARINE...WFO

NWS HGX Office Area Forecast Discussion