Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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FXUS64 KHGX 222014
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
314 PM CDT Sat Apr 22 2017

.DISCUSSION...
A strengthening storm system over the plains will move eastward
tonight. The associated cold front had already moved through most
of SE Texas and as of 3:00 PM was on the verge of moving onto the
coastline. Breezy northerly and northwesterly winds will affect
the area for the remainder of the afternoon. The mostly cloudy
skies will then become mostly clear overnight tonight as the upper
level storm system moves into the MS valley and as surface high
pressure builds into SE Texas. Fair and mild conditions are then
expected through Monday as an upper level shortwave ridge moves
overhead.

Onshore winds return on Tuesday with above normal temperatures
then expected Tuesday through Saturday. Another frontal system
will approach the forecast area during the mid week period. The
GFS and ECMWF disagree on whether or not the front will make its
way to the coast. A stronger storm system will develop over the
southern Rockies late in the week. Increased warm air advection,
moisture advection off of the Gulf of Mexico, and lift from upper
level shortwave troughs will increase the chances of showers and
thunderstorms Friday and Saturday. For now, isolated coverage is
possible on Friday and scattered coverage on Saturday since the
surface front will likely be over OK and the TX panhandle.

40

&&

.MARINE...

A cold front and associated showers will be pushing off the coast
over the next hour or so, bringing breezy north-northwesterly winds
in its wake. Small craft should exercise caution this afternoon as
winds and waves pick up behind the front. A Small Craft Advisory has
been issued for all waters from 7PM this evening through Sunday
morning, but this may need to be extended into Sunday afternoon.

Breezy offshore winds will be decreasing Sunday night into Monday
before gradually becoming onshore by Tuesday. The gradient will
begin to tighten Tuesday through much of the week next week, and
caution or advisory flags may be required as early as mid week. 11

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      67  48  72  49  79 /  30  10   0   0   0
Houston (IAH)              80  52  74  52  81 /  30  10   0   0   0
Galveston (GLS)            80  60  74  63  76 /  20  10   0   0   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...Small Craft Advisory from 7 PM this evening to 10 AM CDT Sunday
     for the following zones: Coastal waters from Freeport to
     the Matagorda Ship Channel out 20 NM...Coastal waters from
     High Island to Freeport out 20 NM...Galveston Bay...
     Matagorda Bay...Waters from Freeport to the Matagorda Ship
     Channel from 20 to 60 NM...Waters from High Island to
     Freeport from 20 to 60 NM.

     SMALL CRAFT SHOULD EXERCISE CAUTION until 7 PM CDT this evening
     for the following zones: Coastal waters from Freeport to
     the Matagorda Ship Channel out 20 NM...Coastal waters from
     High Island to Freeport out 20 NM...Galveston Bay...
     Matagorda Bay.

     SMALL CRAFT SHOULD EXERCISE CAUTION until 7 PM CDT this evening
     for the following zones: Waters from Freeport to the
     Matagorda Ship Channel from 20 to 60 NM...Waters from High
     Island to Freeport from 20 to 60 NM.

&&

$$

Discussion...40
Aviation/Marine...11



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