Sunday, March 4, 2018

Feb. 28 18

Northwest Houston, TX, during the early morning.

Northwest Houston, TX, during the early afternoon.
Northwest Houston, TX, during the late evening.
Northwest Houston, TX, during the early night.
A River Flood Warning issued for the New Caney, TX area.


Locations: Northwest Houston, TX.


Thoughts: The day was mostly cloudy.


Area Forecast Discussion 
Issued by NWS Houston/Galveston, TX
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000
FXUS64 KHGX 010312
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
912 PM CST Wed Feb 28 2018

.NEAR TERM [Through Tonight/Tomorrow]...

Strong LLJ over the region should continue to feed moisture
northward into a low level convergence zone located over north
Texas and then SE Oklahoma into Arkansas. This means temperatures
will not drop much overnight. The convergence zone has been a
focus for training showers and thunderstorms over north Texas
withe the polar jet parallel to the convergence. Surface analysis
shows a cold front over the Texas Panhandle into Oklahoma.
Convection over north Texas may develop a strong cold pool with
its boundary surging south. This boundary should reach SE Texas
later tonight into Thursday morning. The true cold front should
reach the area later in the morning. Overall forecast looks on
track but made some minor adjustments in the near term to account
for better timing of the fronts and possible showers/storms.
Overall think convection will be weak due to capping but enough of
a line to justify higher rain chances north of Houston. Rainfall
from any of the showers or storms should be rather meager, maybe a
tenth of an inch. Activity should move through the area fairly
quickly with skies clearing in the afternoon.

Overpeck

&&

.PREV DISCUSSION /Issued 540 PM CST Wed Feb 28 2018/...

.AVIATION [00Z TAF Issuance]...

Oncoming front looks a bit disjointed, making timing difficult
with tonight`s front. Pressure gradient tonight may slacken a bit
as the front draws near, which would allow for ceilings to lower
(perhaps some brief fog at GLS) and perhaps some isolated showers
towards the coast earlier than by the front alone, and so the TAFs
try to account for this possibility, which has support from some
short range models. There may be some brief improvement as mixing
increases just before frontal showers and storms arrive, but
largely chose to omit this potential as it should be brief to non-
existent.

As the frontal precip moves through, it may take us down to the
edge of IFR for ceilings. However, this line will be outpacing the
front itself and likely weakening. Still have prevailing TSRA at
CLL and UTS, but even this may be a bit aggressive. Go with VCSH
at all the other sites as the line should be falling apart.
Ceilings look to only slowly improve into the morning as the front
lags a bit behind, but should eventually make it to VFR my mid-
morning north to mid- day at the coast. Clearing will take a bit
more beyond that thanks to the front`s tardiness.

Luchs



&&

.PRELIMINARY POINT TEMPS/POPS...

College Station (CLL)  61  71  49  72  48 /  70  10  10  10  10
Houston (IAH)          65  75  51  73  50 /  30  30  10  10  10
Galveston (GLS)        68  76  58  68  58 /  20  30  10  10  10

&&

.HGX WATCHES/WARNINGS/ADVISORIES...

TX...None.
GM...SMALL CRAFT SHOULD EXERCISE CAUTION until 6 AM 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.

     Small Craft Advisory until 6 AM 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.


&&

$$

NEAR TERM...Overpeck
AVIATION...Luchs

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