Area Forecast Discussion
Issued by NWS Lake Charles, LA

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FXUS64 KLCH 200147
AFDLCH

Area Forecast Discussion
National Weather Service Lake Charles LA
847 PM CDT Sat Aug 19 2017

.UPDATE...
Sctd showers and tstms continue to move south and west acrs lower
Acadiana toward coastal southwest LA and the adjacent coastal
waters. This activity developed in conjunction with a shortwave
crossing southeast LA, and aided by strong aftn heating as high
temps reached the upper 90s late this aftn. Updated evening POPs
to reflect ongoing convection which is expected to persist over
the next hour or two, a trend reflected in recent HRRR guidance.
However, activity will continue to weaken and diminish with the
loss of daytime heating, and convection should be mostly
dissipated by midnight.

24

&&

.PREV DISCUSSION... /issued 415 PM CDT Sat Aug 19 2017/

DISCUSSION...Considerable shower and thunderstorm activity
ongoing this afternoon across southern Mississippi and eastern
Louisiana. Activity associated with shortwave energy advancing
south to southwest about the eastern periphery of west gulf
mid/upper high. Will be maintaining pops into the evening hours
over the eastern portion of the forecast area as this feature
moves through. Overall have seen apparent temperatures generally
max at a 103 to 107 range, but did see a few obs briefly higher.
Similar numbers expected Sunday afternoon.

With moisture plentiful in the lowers levels will see hot and
humid days continue followed by warm and muggy nights. Nothing
particularly out of the ordinary. With capping limited or absent
and sufficient moisture, will see a daily chance for mainly
afternoon showers and thunderstorms. Expecting a gradual ramping
up of rains going into the new work-week as low pressure aloft
currently over the eastern gulf advances westward.

MARINE...Surface high pressure over the northwest Gulf will
maintain a light and somewhat variable flow through the weekend.
Winds will trend east to southeast and remain light moving into
the work-week as high pressure becomes oriented across the
southeastern states and adjacent coastal waters. Shower and
thunderstorm activity will be on the increase as low pressure
aloft over the eastern gulf advances slowly east.

23

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  76  93  75  93 /  20  30  10  40
LCH  79  93  77  92 /  10  30  10  30
LFT  77  93  76  93 /  30  30  10  40
BPT  78  93  78  92 /  10  30  10  30

&&

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

$$



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