Wednesday, May 12, 2021

May. 12 21

 Area Forecast Discussion

Issued by NWS Houston/Galveston, TX

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000
FXUS64 KHGX 122325
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
625 PM CDT Wed May 12 2021

.AVIATION...
MVFR ceilings will persist overnight. Look for them to slowly
lift & partially scatter during the morning and early afternoon
hours Thurs from north-south. Most terminals should be VFR by late
afternoon, though some thin cigs may linger closer to the coast. 47

&&

.PREV DISCUSSION... /ISSUED 319 PM CDT Wed May 12 2021/
SHORT TERM [Tonight Through Thursday Night]...
While overcast skies continue to hang around SE TX, shower
activity has largely diminished behind the departing surface
frontal boundary which has advanced well offshore during the day
today. This should pave the way for a slight reprieve from the
heat and humidity of late as north to northeasterly winds provide
an influx of cooler and drier air to the region. Overnight, expect
lows to dip into the upper 50s across the northern zones, near 60
in the Houston metro, and in the mid-60s along the coast. Low
temperatures will be moderated slightly by continued broken to
overcast skies, which will inhibit nocturnal radiative cooling.

Thursday is shaping up to be a generally pleasant day as the
aforementioned offshore flow pattern pushes dew points down into
the 50s at most locations. The continued push of drier air will
allow for some clearing, with clouds scattering out by the
afternoon. Highs will be around 5-8 degrees below climatological
norms, with most locations looking likely to stay in the upper
70s. Overnight lows will once again reach the 50s and 60s. Enjoy
the low dew points while you can, because you might not see them
again for quite some time!

Cady

LONG TERM [Friday Through Wednesday]...

Surface high pressure is still on schedule to move off to the east
on Friday, and this will allow for an onshore flow to return to the
area. Heading on into the weekend with southeast winds in place,
look for an increase in temperatures (lows in the 60s Saturday
morning and in the 60s/70s Sunday morning...highs back into the low
to mid 80s) and an increase in moisture levels (precipitable water
values back into a 1.50 to 2.00ish range). Look for the first in a
series shortwaves over the weekend that will bring areas of rain
back into the forecast. For the first half of next week, models are
generally showing a slow moving mid/upper level low edging out of
the Great Basin area and toward the Central Plains. This pattern
will allow for more shortwaves and/or weak troughs to move across
the state and bring our area periods of showers and possible
thunderstorms. Look for forecast adjustments to be made to the rain
chances over the next several days as models gradually come into
better agreement. For temperatures, most locations will have lows in
the 70s and highs in the 80s. With some luck, daytime rains could
end up keeping highs in the 70s for some of the days, which is not a
bad thing to happen for our area in the middle of May. 42

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      58  75  59  80  63 /  10   0   0   0   0
Houston (IAH)              61  78  61  81  65 /  10   0   0   0   0
Galveston (GLS)            66  78  69  78  72 /  10   0   0   0   0

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.

&&

$$

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