Area Forecast Discussion
Issued by NWS Shreveport, LA

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357
FXUS64 KSHV 180529
AFDSHV

Area Forecast Discussion
National Weather Service Shreveport LA
1129 PM CST Sat Feb 17 2018

.AVIATION...
IFR conditions to prevail through much of the terminal forecast
period. Periods of mist/BR may keep visibilities around 4SM from
18/08-18/20Z across several locations excluding TYR/TXK.
Northeast winds 5-10 knots becoming east then south by 18/12Z.
South to southeast winds to increase to 10 to 12 knots on Sunday
and persist through 19/06Z. /05/

&&

.PREV DISCUSSION... /issued 941 PM CST Sat Feb 17 2018/

DISCUSSION...
A band of very light precip continues to very slowly move
southeast across Deep East Texas and Northern Louisiana. This is
occurring behind a surface cold front, which has moved well south
of the area. The rain is either very light or just drizzle as
radar returns are quite weak. This conclusion is also supported by
the fact that the WSR-88D is automatically switching into VCP 32
rather than staying in "precip mode." Therefore, PoPs were
decreased somewhat for the remainder of the night.

Across Southeast Oklahoma, Northeast Texas, and portions of
extreme Southwest Arkansas, low clouds have not yet developed.
This has allowed temperatures to cool quickly. Many locations in
our northwest zones are already within a couple degrees of
forecast lows. Therefore, minimum temperatures were lowered by a
few degrees in that area. I would not be surprised to see
temperatures warm by one or two degrees after temperatures bottom
out after midnight once low clouds and fog begin to develop.

Speaking of fog, surface obs show that patchy fog is already
developing across East Texas and Southwest Arkansas. Areas of fog
were inserted into the grids after midnight in areas without PoPs.
Maintained the wording of "patchy" rather than "areas of" after
sunrise since visibilities should slowly improve after daybreak,
even though patchy fog will likely persist for several hours
Sunday morning.

Updated text products will be sent shortly.

CN



&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  47  66  60  80 /  10  30  20  10
MLU  46  66  60  80 /  30  40  10  10
DEQ  37  58  52  73 /   0  30  40  50
TXK  42  59  56  78 /  10  30  30  30
ELD  43  60  55  79 /  10  30  20  10
TYR  47  67  61  76 /  10  30  20  30
GGG  47  67  60  79 /  10  30  20  20
LFK  52  74  62  80 /  30  30  10  20

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...None.
LA...None.
OK...None.
TX...None.
&&

$$

05/CN



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