Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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FXUS64 KHGX 221543
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
943 AM CST Thu Feb 22 2018

.UPDATE...
With morning fog and clouds suppressing temperature rises some
this morning, have taken highs down a little. Also, with the rain
fizzling some up north, have reconfigured PoPs today to focus
closer to the coast instead, particularly this afternoon as a
subtle shortwave will pass by and should give the coverage of
showers a bit of a boost.

&&

.PREV DISCUSSION... /ISSUED 400 AM CST Thu Feb 22 2018/

DISCUSSION...
Early morning Southeast Texas temperatures are cool in the
wake of yesterday`s cold front with upper 30s to lower 40s
north, upper 40s to lower 50s central and lower 60s near
the coast. Radar is showing mainly showers and some isolated
thunderstorms with the greatest concentration generally north
of the I-10 corridor. With a persistent southwest aloft for
the next several days, expect to see periods of showers and
thunderstorms with the higher rain chances up north and the
lower rain chances closer to the coast. An onshore flow
returns to the area and strengthens on Friday and Saturday
resulting in warming temperatures. A cold front moves through
the area Saturday night and cools us back down. An onshore
flow looks to come back on Monday night or Tuesday as surface
high pressure moves off to the east and pressures begin to
fall off to our northwest.  42

MARINE...
Stationary front situated from roughly High Island to 30nm south of
Matagorda Bay will be returning north as a warm front today. Areas
of dense sea fog is situated near the front and will become a
problem again for the bays as onshore flow resumes. Fog will be an
issue until late Sat night with the passage of another front.
Onshore flow and building seas in advance may require caution flags
in the 20-60nm waters Fri night & Sat.  Northeast winds behind the
front will prevail for a couple of days before veering onshore again
on Tue. 47

AVIATION...
Poor flying conditions expected with LIFR/IFR ceilings and areas of
fog/shra persisting throughout the day. Metro airports may see a few
hours of MVFR ceilings late in the afternoon once the warm front
passes to the north - but it`ll be temporary and expect them to fall
right back down after sunset. Fog and periods of -ra can be expected
overnight as moisture overruns the warm front and subtle
disturbances embedded in the sw flow aloft move overhead. 47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      49  53  75  64  75 /  40  60  40  30  60
Houston (IAH)              67  62  79  67  79 /  60  50  30  30  50
Galveston (GLS)            70  64  73  65  74 /  50  30  20  20  30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...Dense Fog Advisory until noon CST today 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 noon CST today 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...25



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