Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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029
FXUS64 KHGX 222119
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
319 PM CST Mon Jan 22 2018

.DISCUSSION...
Sunny skies have allowed for 3 PM CST temperatures to warm into
the mid and upper 60s this afternoon, with drier air filtering
into the area resulting in relative humidities in the 20-30
percent range this afternoon. Elevated fire weather conditions
will continue through sunset before diminishing as surface ridging
spreads farther west from the Texas Caprock. Clear and dry
conditions tonight will promote good to excellent conditions for
radiational cooling, allowing overnight lows to fall into the mid
30s to lower 40s. A few locations may briefly reach freezing
around sunrise. After a cool start, temperatures will warm into
the low to mid 60s on Tuesday under mostly sunny to partly cloudy
skies. Dry conditions are expected again tomorrow but lighter
winds should preclude the elevated fire weather threat continuing
into Tuesday.

Surface ridging will maintain its influence over the region
Wednesday into Thursday, before being nudged eastward ahead of a
mid-level disturbance from the Pacific. Expect this disturbance to
have little impact on the region, save for allowing Gulf moisture
and clouds to return Thursday into Friday morning. Temperatures
should remain fairly steady through the end of the work week with
highs in the upper 50s to mid 60s and lows in the mid 30s to mid
40s. Returning moisture will result in a few streamer showers
spreading across the region Thursday night into Friday and
continuing into the weekend as a surface trough or low develops in
the western Gulf of Mexico. Expect best rain chances to exist
this weekend in the vicinity of this feature and have adjusted
rain chances across the coastal waters to reflect this.

A cold front is expected to arrive late this weekend (sometime
late Saturday or Sunday), bringing another brief window for a few
showers before pushing moisture off the coast. Dry and mild
conditions are expected to settle into the region behind this
front.

Huffman

&&

.MARINE...
As high pressure moves in from the west and weakens the offshore
pressure gradient tonight, far offshore Gulf winds will lower to
below Small Craft Exercise Caution criteria. Other than a slight
early Tuesday morning strengthening back to Caution, weaker
northeasterly winds will veer to the east and increase back up to
Caution once again going into Wednesday. High pressure ridging
over the southeastern U.S., in relation to lower Bay of Campeche
pressure, will set up a fairly tight east-to-west fetch across our
local Gulf waters from Wednesday through Friday. This will create
a longer period swell with average wave heights ranging from
around 3 feet to as high as far offshore 6 foot heights. A western
gulf disturbance on Saturday will likely increase rain chances
and keep east-southeast winds moderate. The next cold front will
travel across the maritime late Saturday into early Sunday and
hoist nearshore Caution and offshore Advisory flags. 31

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      37  64  36  63  38 /   0   0   0   0   0
Houston (IAH)              39  66  39  64  40 /   0   0   0   0   0
Galveston (GLS)            48  64  45  59  46 /   0   0   0   0   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT SHOULD EXERCISE CAUTION until 10 PM CST 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...14
Aviation/Marine...31



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