Area Forecast Discussion
Issued by NWS Houston/Galveston, TX

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FXUS64 KHGX 070554
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1154 PM CST Wed Dec 6 2017

.AVIATION...
Minimal changes made to the 06Z TAFs with light rain continuing
to stream across the terminals from the west. Have received a few
reports of PL near CLL and cannot rule out isolated instances of
PL/SN mixed in with the rain near the terminals during the
overnight hours. The best window for this to occur still appears
to be in the 09-16Z timeframe for inland terminals and will have
to monitor for another possible round of PL/SN after 08/00Z for
IAH/HOU/SGR/LBX/GLS as another upper level speed maxima lifts
across the region. VFR conditions are expected to prevail through
the TAF period but brief reductions to MVFR or IFR will be
possible at any terminal in heavier areas of precipitation. Given
surface temperatures well above freezing, terminal impacts are
not anticipated. Otherwise, expect winds 5-12 knots inland
overnight to increase to 8-15 knots during the day Thursday.
Stronger winds in the 15-25 knot range are expected to persist at
LBX and GLS.

Huffman

&&

.PREV DISCUSSION... /ISSUED 1044 PM CST Wed Dec 6 2017/

DISCUSSION...
Sleet reports coming in around College Station between 945 and
1030 pm. The earlier (afternoon/early evening) 700-500mb speed
max pulling away into eastern LA/southern MS now and hence the
lull in precip earlier this evening.

Another speed max approaching the the area and precip intensity
picking up well to the west of the area. As this feature tracks
into the area in the next 3-4 hours expect the coverage of light
rain to expand with a few bands of moderate rainfall likely over
the central areas shifting southward towards sunrise.

As for precip type...currently soundings support mainly rain with
spotty ice pellets but as cooling occurs the transition should
begin to show up with some very light snow mixed into the
precipitation. Might even have some slightly heavier snow showers
across the south around sunrise through 9 am. Again temperatures
staying above freezing even with wet-bulbing at the surface so no
icy accumulations are expected...just a visually interesting mix
of precip types to admire if you are outside (wearing your coat
and gloves). Temperatures should range from 36-40 degrees tonight
for areas north of Highway 59 corridor and 40-44 south of the
corridor. Wind chill readings of 33 to 39 will be common tonight
and early Thursday morning so dress warmly.

45

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      37  51  30  53  34 /  80  40  20  10   0
Houston (IAH)              39  49  34  49  35 /  90  80  40  10   0
Galveston (GLS)            44  52  39  51  45 /  80  90  60  30   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...Small Craft Advisory until 9 PM CST Thursday 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 Advisory until midnight CST tonight 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.

     Gale Warning until 9 PM CST Thursday 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...45
Aviation/Marine...14



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