Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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676
FXUS64 KHGX 170558
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1158 PM CST Fri Feb 16 2018

.AVIATION...
The cold front has stalled just south of SGR and north of HOU this
evening and should remain in this area over the next few hours.
North of the front, IFR to MVFR ceilings will be possible
overnight with visibilities briefly dropping into the 3-6 mile
range as light radiational fog develops. South of the front, SPC
mesoanalysis shows some drier air around 925 MB working its way
into the coastal areas and this may dramatically affect the
ceilings at LBX over the next few hours as it appears to be
scouring out VLIFR/LIFR ceilings based on nearby observations.
Will have to see how far inland this drier air penetrates but it
may also mean the HOU TAF needs to be amended for higher than
forecast ceilings. Sea fog will remain persistent at GLS through
the evening, but visibilities may fluctuate depending on the
aforementioned dry air.

Expect ceilings to lift to MVFR north of the front by mid to late
morning Saturday, with mixing south of the front allowing for a
window of VFR conditions (outside of GLS) Saturday afternoon.
Heating along the front may be enough to produce a few light
showers near the Houston terminals.

Light northerly winds will persist for SGR, IAH, CXO, UTS, and CLL
through the period, especially with a reinforcing front on
Saturday. Isolated showers will be possible along this boundary
near CLL and UTS Saturday afternoon and evening. Light south to
southeast winds along the coast are expected to persist through
the TAF period.

Huffman

&&

.PREV DISCUSSION... /ISSUED 900 PM CST Fri Feb 16 2018/

UPDATE...
It looks like the front has finally stalled out between IAH and
Hobby with a few showers still ongoing along it. Sea fog has
already begun to roll into the coastal zones this evening, but
the front will limit its inland progression. For areas south of
the front, fog will likely settle in tonight and remain in place
until late morning or midday Saturday. 11

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      53  60  54  71  63 /  10  40  30  30  20
Houston (IAH)              63  69  57  73  64 /  30  40  30  30  20
Galveston (GLS)            63  69  60  70  65 /  20  30  20  20  20

&&

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

&&

$$

Discussion...11
Aviation/Marine...14



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