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National Weather Service Forecast Discussion

626
FXUS64 KHGX 191727
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1227 PM CDT Sat Sep 19 2026

...New DISCUSSION, AVIATION, MARINE...

.KEY MESSAGES...

 - Hot and dry conditions continue today.

 - Diurnal storm chances along with humidity return Sunday and
   persist through next week.

&&

.DISCUSSION...
Issued at 1222 PM CDT Sat Sep 19 2026

Latest mid and lower level water vapor imagery shows the dry air
still well in place over the area. An upper ridge centered over
north-central Texas will continue to bring hot temperatures,
however given the drier air, humidities will be again lower
similar to Friday. Heat indicies will generally range from around
102-105F. A weak trough approaching from the west will begin to
break down the ridge, weakening the capping and allowing for
diurnal storm chances to return. These will initially be quite
isolated and generally confined to areas along the coast, east of
Galveston. Humidity will be a couple degrees higher, though should
remain below advisory criteria.

There are no significant changes from next week from the previous
forecast. Hot and humid conditions will persist with diurnal
isolated storm chances along the coast. A weak cold front late-week
may drop temperatures a few degrees and bring less humidity. An
upper ridge also looks to strengthen over the same time frame and
curtail any storm chances.

&&

.AVIATION...
(18Z TAF Issuance)
Issued at 1222 PM CDT Sat Sep 19 2026

VFR conditions prevail at all TAF sites with light and VRB winds.
Winds pick back up and settle out of the ESE tomorrow afternoon.
KCXO has a chance for patchy fog early tomorrow morning, which
should clear out shortly after sunrise. Precipitation chances remain
very minimal tomorrow. KGLS may see a few short lived showers in the
morning/early afternoon. Otherwise, VFR conditions are expected thru
the TAF period.

&&

.MARINE...
Issued at 1222 PM CDT Sat Sep 19 2026

Light ESE winds peaking just over 10 kts intermittently will
continue through Tuesday. Seas of 2 to 4 ft persist over this period
as well. Isolated showers and thunderstorms are expected each day
starting Sunday.

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)  73  98  75  98 /   0   0   0  10
Houston (IAH)  76  96  77  97 /   0  10   0  10
Galveston (GLS)  83  90  83  91 /  20  30  10   0

&&

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

$$

DISCUSSION...AP
AVIATION...JMG
MARINE...AP

NWS HGX Office Area Forecast Discussion