Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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405
FXUS64 KHGX 190524
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1124 PM CST Sun Feb 18 2018

.DISCUSSION...
Water vapor imagery shows drier air working into the region and
this is reflected in forecast soundings and the lack of low level
moisture. Guidance shows a mixed bag with regard to ceiling
heights/visibility tonight but think the drier solutions may be on
to something. The pressure gradient is tight enough to support
moderate to strong winds and between the mixing from the winds and
slightly drier air, feel MVFR cigs will be most likely. Gusty
S-SE winds are expected on Monday as low pressure tracks across
the central plains. Sea fog at KGLS has dissipated and don`t think
it`ll be back overnight but could return again Monday evening. 43

&&

.MARINE...
The gradient has tightened significantly and sustained winds are
approaching 20 knots offshore so felt it was best to issue an SCA
for the offshore waters. Will carry a Caution statement elsewhere
but southerly flow is having trouble mixing to the surface over
the cooler nearshore waters. Fog has dissipated and dropped the
Dense FOg Advisory for the southern nearshore waters but continued
the Advisory off Galveston and Galveston Bay. Web cameras still
showing pockets of dense fog over the bay. 43

&&

.PREV DISCUSSION... /ISSUED 848 PM CST Sun Feb 18 2018/

UPDATE...
Only minor changes made to ongoing forecast. Cloud cover and
elevated southerly winds in response to a surface low over the
High Plains will result in overnight low temperatures only falling
into the lower to mid 60s. May see a few isolated showers skirt
the Brazos Valley before sunrise as an upper level disturbance
located over Chihuahua on SPC Mesoanalysis lifts northeast
overnight.

Huffman


&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      78  64  79  66  76 /  20  20  20  20  60
Houston (IAH)              77  64  80  67  77 /  20  10  20  20  50
Galveston (GLS)            74  64  73  66  73 /  20  10  20  20  30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT SHOULD EXERCISE CAUTION until 6 AM CST Monday 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.

     Dense Fog Advisory until 6 AM CST Monday for the following
     zones: Coastal waters from High Island to Freeport out 20
     NM...Galveston Bay.

     Small Craft Advisory until 6 AM CST Monday 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...14



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