Monday, March 5, 2018

Mar. 2 18

Northwest Houston, TX, during the early morning.
Northwest Houston, TX, during the early afternoon.
West Houston, TX, during the late evening.


Locations: Northwest and west Houston, TX.


Thoughts: The day was warm, dry, and mostly cloudy.


Area Forecast Discussion 
Issued by NWS Houston/Galveston, TX
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000
FXUS64 KHGX 030511
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1111 PM CST Fri Mar 2 2018

.AVIATION...
Not much change in the forecast as skies have largely cleared
across the area. There may be some light ground fog as a couple
non-TAF sites are down to 7 miles. VFR is still expected through
the bulk of the forecast period, with light and variable winds
increasing to about 10 knots for the afternoon out of the east
with mid-level clouds developing. There is a low chance of
showers, but not high enough to warrant including in the TAF.

Still looking for ceilings to fall from southwest to northeast
towards the end of the period. Keeping CXO northward in VFR as
the fall in ceilings is still holding off beyond 06Z in the
consensus of short range models. For the other sites, go down into
MVFR in the late afternoon (LBX) to evening (metro sites and GLS).

Luchs

&&

.PREV DISCUSSION... /ISSUED 1019 PM CST Fri Mar 2 2018/

UPDATE...
No major updates this evening. Adjusted the T/Td/Sky field grids
to better match up with ongoing evening trends. Mild and dry
overnight conditions, temperatures falling into the far interior
lower 50s to lower 60s along coastline, under clear skies and
weak east breezes. Mainly sky clear with increasing cloudiness
from the southwest to northeast through the day tomorrow. Maybe
some very light precipitation out across the far west initiated by
a weak shortwave disturbance riding atop a regional upper ridge
axis. Partly becoming mostly cloudy Saturday will warm into the
upper 60s to lower 70s under returning warm air advection as
winds veer to onshore by early tomorrow evening. 31

PREV DISCUSSION... /ISSUED 534 PM CST Fri Mar 2 2018/

AVIATION...
Satellite shows diminishing low fair weather cumulus in most of
the area, along with a band of broken high clouds (170 or so to
250) working their way southeastward while diminishing over the
next few hours.

Beyond that, pretty quiet VFR conditions expected tonight with
light winds becoming easterly towards morning. Also towards
morning look for the development of a mid-level cloud deck that
should gradually lower from southwest to northeast late in the
day. Looks to be late enough that I only take LBX and GLS to MVFR
before the end of the forecast period, but should expand to other
metro sites in future forecast cycles. Can`t rule out a shower or
two entirely tomorrow, but potential is low enough that it`s not
worth mentioning in the TAF at this time. Luchs

PREV DISCUSSION... /ISSUED 307 PM CST Fri Mar 2 2018/

DISCUSSION...
Mostly sunny to partly cloudy skies are found across Southeast
Texas this afternoon as surface high pressure ridges into our area
from the north. Temperatures so far have warmed into the low to
mid 70s, and some upper 70s are probably going to be reached over
the next couple of hours. Winds have begun to become a little more
easterly, and southeast directions can be expected area wide by
late Saturday night or early Sunday morning in response to
deepening lee of the Rockies low pressure. Low rain chances come
back into the forecast on Saturday out west as moisture levels
begin to rise, then begin an increasing trend almost area wide on
Saturday night and Sunday. Our next best chance of rain still
looks to be setting up on Monday and possibly into Monday evening
as deep moisture levels pool ahead of a cold front. The front
looks to move through the area mainly Monday night through Tuesday
morning. A drier airmass will filter in behind the front and will
bring an end to this rain event. A west to northwest flow aloft
and surface high pressure sets up behind this system and helps to
bring drier weather and cooler temperatures to the area until the
end of the week. Overnight lows in the 40s and 50s will be common
Wednesday through Friday, and some of our northern locations are
expected to dip into the 30s on Thursday. 42

MARINE...
High pressure over the western Great Lakes will move east tonight.
Northeast winds will become east later tonight and remain out of
the east on Saturday. Seas are still between 7-8 feet at Bouy 019
this afternoon and will maintain the SCA through 03z for the offshore
waters but seas will gradually subside below SCA criteria later this
evening. Will maintain SCEC for the near shore waters tonight and
this may need to be extended on Saturday. As the surface high drifts
further east on Sunday, SE winds will develop and S-SE winds will
persist through early Tuesday. A cold front will approach the coast
early Tuesday and there are still some timing differences between
the GFS and the ECMWF with the GFS faster. The timing differences
are not as extreme as the past couple of days but will still lean
toward the slower ECMWF/Can solutions. A moderate to occasionally
strong NE flow is expected in the wake of the front with a NE wind
expected to persist through Thursday.

A persistent east to southeast fetch this weekend may result in tide
levels peaking near 2.5 feet above MLLW at times of high tide, but
tidal issues are not expected given these levels and forecast wave
periods in the 5-7 second range. 43

PREV DISCUSSION... /ISSUED 1114 AM CST Fri Mar 2 2018/

AVIATION...
MVFR ceilings affecting KGLS and KLBX should mix out this
afternoon and VFR conditions are expected to prevail areawide
this afternoon. A brisk NE wind will become east with time and
winds are expected to decouple overnight except along the coast.
Low level moisture begins to return on Saturday and might get
some patchy ground fog early Saturday but probabilities look
too low to mention at this time. VFR/MVFR ceilings possible
between 15-18z but more likely after 18z Saturday. 43

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      76  51  71  59  74 /   0   0  10  30  40
Houston (IAH)              73  53  72  61  75 /   0   0  10  20  40
Galveston (GLS)            74  62  70  66  73 /   0  10  20  20  30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT SHOULD EXERCISE CAUTION through Saturday afternoon
     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.

     Small Craft Advisory until 3 AM CST Saturday 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.

     SMALL CRAFT SHOULD EXERCISE CAUTION from 3 AM CST Saturday
     through Saturday afternoon 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...31
Aviation/Marine...25

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