Area Forecast Discussion
Issued by NWS Lake Charles, LA

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FXUS64 KLCH 221647
AFDLCH

Area Forecast Discussion
National Weather Service Lake Charles LA
1047 AM CST Wed Feb 22 2017

.UPDATE...
Upper low has moved east of the area, with some wrap around
moisture on its backside bringing a swath of low clouds acrs LA.
Clouds are expected to diminish through the day as the upper low
continues toward FL and drier air overspreads the region. Made
some minor tweaks to sky cover in grids and zones to reflect
recent obs/trends. Also adjusted hourly temperatures and
dewpoints but this did not result in any change to aftn max temps
with lower 70s acrs the eastern zones to upper 70s acrs southeast
TX.

24

&&

.PREV DISCUSSION... /issued 526 AM CST Wed Feb 22 2017/

AVIATION...
IR satellite imagery and surface observations show low level
stratus resulting in MVFR CIGs across eastern TAF sites. These
sites could see TEMPO IFR CIGs through 15Z this morning. The low
level stratus is expected to mix out giving way to VFR conditions
at all TAF sites by early afternoon with northerly winds. Winds
should drop to variable after sunset tonight.

26

PREV DISCUSSION... /issued 255 AM CST Wed Feb 22 2017/

DISCUSSION...
Wx map shows departing sfc low over the NE Gulf, with weak high
pressure building eastward from Texas. Slightly cooler and drier
air will continue to filter across the region this morning.
Only very slow clearing from west to east will continue today as
wrap around clouds associated with the upper low over MS/AL moves
slowly east as well. Thus, keeping mostly cloudy to cloudy skies
over C and SC LA with highs only making it into the lower/mid 70s.
Further west over SE TX, clearing skies will allow temps to rise
into the upper 70s.

For the remainder of the week, weak high pressure will gradually
slide eastward tonight and Thursday. Southerly winds will increase
Thursday night into Friday morning as low pressure intensifies
over the Central Plains. A stronger cold front will move through
the region late Friday night into Saturday morning. With limited
moisture, only going with 20% over South Central Louisiana, with
less further west. Behind the front, temperatures will return to
normal values for Sunday.

Cool spell will not last long, as return flow expected by Monday with
temperatures rising to about 10-15 degrees above normal once again.
Bring in slight chances of precipitation by Tuesday with the approach
of the next upper level disturbance and frontal boundary.

DML

MARINE...
Northerly winds behind a departing cool front will linger today
before becoming light and variable tonight and Thursday as high
pressure settles over the region. Onshore flow will increase
Thursday afternoon into Friday morning as low pressure intensifies
over the Central Plains. Stronger offshore flow will return
Friday night and Saturday morning with a stronger cold frontal
passage.

DML

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  73  53  79  57 /   0   0   0  10
LCH  75  56  76  60 /   0   0   0  10
LFT  74  54  78  59 /   0   0   0  10
BPT  78  57  77  62 /   0   0   0  10

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...None.
TX...None.
GM...None.
&&

$$



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