Brier Weather Station
Latitude N 47° 46' 49" Longitude W 122° 16' 48" Elevation 341 ft
133
FXUS66 KSEW 180356
AFDSEW
Area Forecast Discussion
National Weather Service Seattle WA
856 PM PDT Fri Apr 17 2026
.SYNOPSIS...Weak high pressure building over the area for drier
and cooler conditions into Saturday. A weak front will clip the
area on Sunday but most of the area will remain dry with warmer
temperatures. Warm conditions continue through early next week.
&&
.SHORT TERM /TONIGHT THROUGH SUNDAY NIGHT/...High clouds
continue to move overhead of western Washington as an upper
level low approaches well offshore. Dry conditions continue into
Saturday. No major forecast updates this evening, previous
discussion below.
Upper ridging offshore will help conditions remain quiet and
calm this afternoon with a mix of sun and clouds. High
temperatures this afternoon will generally range in the mid to
upper 50s for locations along the interior, while areas along
the coast could see temperatures in the low to mid 50s. As for
overnight temperatures, we`re looking at lows in the mid to
upper 30s, even lower 40s in some spots. With cloud cover
remaining throughout the overnight, not seeing much in terms of
frost potential, with minimal impacts expected due to overall
warmer temperatures.
High temperatures on Saturday will warm considerably, with
temperatures in the upper 60s, with some locations possibly
seeing temps in the low 70s. Overnight lows will be warmer than
previous nights, with lows in the mid to upper 40s.
An upper level low will dig along the coast on Sunday but latest
guidance shows it shifting southward and grazing our waters. A
weak front will clip our coastal waters but overall Western
Washington should stay relatively dry with high temperatures
still in the upper 60s into lower 70s.
&&
.LONG TERM /MONDAY THROUGH FRIDAY/...The aforementioned upper
level low will make its way inland along the Oregon coast with a
chance for some wrap-around moisture Monday into Tuesday. We`ll
see Minor HeatRisk across interior locations on Monday with
high temperatures in the low to mid 70s for some interior
locations - areas along the water will see temps in the mid 60s.
Ensemble guidance shows renewed precipitation chances midweek
as wrap around moisture brings continued showers across the
region, with a cool down to normal temperatures in the upper 50s
to 60s.
Mazurkiewicz
&&
.AVIATION...VFR cigs expected to continue throughout Saturday. High
clouds will increase tonight. Variable to light NE flow expected
tonight into the morning hours. Winds will increase in the afternoon
to 5-8 kt. 29
KSEA...VFR cigs will prevail into Saturday with high clouds
increasing in coverage tonight. Light NE winds into Saturday morning,
becoming WNW in the afternoon around 5-7 kt. 29
&&
.MARINE...High pressure weakens slightly as the next week front
drops in from the north into Saturday. This will bring up the seas
over the far outer coastal waters up to around 7 feet late Saturday
night, decreasing to 5 ft Sunday afternoon. Seas rise again slightly
on Monday as another weak system traverses the waters. Winds will be
stronger over the outer coastal waters during this timeframe as
well, peaking on Wednesday.
21
&&
.HYDROLOGY...River flooding is not expected through the next
seven days.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...None.
&&
$$
NWS SEW Office Area Forecast Discussion