Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 181731
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1231 PM CDT Tue Jul 18 2017

.AVIATION...
Convection near KIAH and KLBX will likely wane within the next
hour or so with conditions generally improving for the remainder
of the afternoon. PW values decrease tonight into Wednesday and
rain chances look to decrease as well. Fcst soundings don`t show
much in the way of saturation on Wednesday so will not mention
VCSH/VCTS on Weds expect for KGLS during the early morning. HRRR
and other short term guidance not supportive of fog or low cigs
overnight but wet ground from today`s rain could lead to some
patchy ground fog in a few spots. Winds will remain light through
Wednesday with a weak sea breeze possible this aftn. Winds will be
variable in and near storms. 43

&&

.PREV DISCUSSION... /ISSUED 950 AM CDT Tue Jul 18 2017/

DISCUSSION...
Thunderstorms were occurring mainly along and south of a weak
surface trough and east of Galveston. Satellite PWs were near 2
inches over most of the central and coastal counties. The
surrounding 12Z soundings were uncapped as well. Expect the
convection to work its way inland throughout the day. A model
consensus then shows the coverage to diminish with sunset.

40

PREV DISCUSSION... /ISSUED 639 AM CDT Tue Jul 18 2017/

AVIATION...
SHRA/TSRA are developing in and around Galveston Bay and also near
the coast, so have included mainly VCSH to start out the 12Z TAFs
in that area. Expect activity to develop further inland during the
day today, so have included VCTS at some sites near the coast this
morning and inland TAF sites this afternoon. Light winds this
morning become SE and S this afternoon, all expected to increase
to around 5 to 10 knots. VFR outside of the rain areas and
MVFR/IFR near the storms.  42

MARINE...

Light to moderate south to southeast winds will persist
for the remainder of the week (higher winds and seas are
possible in/around shower and thunderstorm activity).
Mainly moderate south winds and slightly higher seas
(both expected to remain under caution levels) are
anticipated over the weekend in response to a tightening
pressure gradient. 42

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      95  76  97  76  97 /  20  20  20  10  20
Houston (IAH)              92  75  95  77  95 /  50  20  40  10  30
Galveston (GLS)            89  81  91  82  92 /  40  20  40  20  30

&&

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

$$



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