Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Seattle/Tacoma, WA
Issued by NWS Seattle/Tacoma, WA
810
FNUS56 KSEW 181025
FWFSEW
Fire Weather Planning Forecast for Western Washington
National Weather Service Seattle WA
325 AM PDT Tue Aug 18 2026
.DISCUSSION...Low level onshore flow with good humidity recoveries
overnight through Thursday. Pattern change Friday with the potential
for convection in the Cascades and to a lesser extent the Olympics
Friday and Saturday as weak upper level low offshore moves inland to
the north. Weak ridging aloft and low level onshore flow return
Sunday into next week.
Forecast for 20 foot wind speed (valleys and ridge tops) are 10
minute averages reflecting RAWS winds.
WAZ649-182315-
North and Central Coastal Strip-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Partly sunny.
* Max temperature.......59-69.
* Min humidity..........79-94 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Southwest winds 3 to 6 mph.
* Ridges/upr slopes...Southwest winds 3 to 6 mph.
* Mixing height.........700-1300 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Mostly cloudy.
* Min temperature.......50-60.
* Max humidity..........94-100 percent.
* 20-foot winds.........
* Valleys/lwr slopes..West winds around 3 mph in the evening
becoming light.
* Ridges/upr slopes...West winds around 3 mph in the evening
becoming light.
* Mixing height.........500-900 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Mostly cloudy.
* Max temperature.......59-69.
* Min humidity..........78-93 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Light winds becoming southwest around 4 mph
in the afternoon.
* Ridges/upr slopes...Light winds becoming west around 3 mph in the
afternoon.
* Mixing height.........800-1600 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. West winds
around 3 mph in the evening becoming light.
.THURSDAY...Partly sunny. Highs 63 to 73. Light winds becoming west
around 4 mph in the afternoon.
.THURSDAY NIGHT...Mostly cloudy. Lows in the mid 50s. West winds
around 3 mph in the evening becoming light.
.FRIDAY...Mostly cloudy. Highs in the mid 60s. Light winds becoming
southwest around 5 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Lows in the upper 50s. South winds
around 4 mph.
.SATURDAY...Cloudy with slight chance of showers. Highs in the mid
60s. South winds around 5 mph.
.SUNDAY...Mostly cloudy. Lows in the mid 50s. Highs 62 to 72.
.MONDAY...Mostly cloudy. Lows in the mid 50s. Highs 62 to 72.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ650-182315-
North Coastal Lowlands-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Partly sunny.
* Max temperature.......66-76.
* Min humidity..........62-77 percent...except 67-82 percent
ridges.
* 20-foot winds.........
* Valleys/lwr slopes..Light winds becoming southwest around 3 mph
in the afternoon.
* Ridges/upr slopes...Southwest winds 3 to 5 mph.
* Mixing height.........700-1600 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Mostly cloudy.
* Min temperature.......49-59.
* Max humidity..........81-96 percent...except 87-100 percent
ridges.
* 20-foot winds.........
* Valleys/lwr slopes..West winds up to 3 mph.
* Ridges/upr slopes...West winds around 3 mph in the evening
becoming light.
* Mixing height.........400-1000 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......65-75.
* Min humidity..........66-81 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Light winds becoming west around 3 mph in the
afternoon.
* Ridges/upr slopes...Light winds becoming west around 3 mph in the
afternoon.
* Mixing height.........1100-2100 ft AGL.
* Transport winds.......South around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows 50 to 60. Northwest winds up
to 3 mph.
.THURSDAY...Mostly sunny. Highs 70 to 80. Light winds becoming west
around 3 mph in the afternoon.
.THURSDAY NIGHT...Partly cloudy. Lows 51 to 61. Light winds.
.FRIDAY...Partly sunny. Highs 65 to 75. Light winds becoming
southwest around 4 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Lows in the mid 50s. Southwest winds
around 4 mph.
.SATURDAY...Mostly cloudy with slight chance of showers. Highs 61 to
71. Southwest winds around 4 mph.
.SUNDAY...Mostly cloudy. Lows in the mid 50s. Highs 65 to 75.
.MONDAY...Partly cloudy. Lows in the mid 50s. Highs 66 to 76.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ651-182315-
Central Coastal Lowlands-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Partly sunny.
* Max temperature.......66-76.
* Min humidity..........71-86 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Light winds becoming west around 5 mph in the
afternoon.
* Ridges/upr slopes...Light winds becoming west around 4 mph in the
afternoon.
* Mixing height.........900-1900 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Mostly cloudy.
* Min temperature.......Around 55.
* Max humidity..........85-100 percent.
* 20-foot winds.........
* Valleys/lwr slopes..West winds around 5 mph in the evening
becoming light.
* Ridges/upr slopes...West winds 3 to 6 mph.
* Mixing height.........700-1400 ft AGL.
* Transport winds.......West 5 to 10 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......67-77.
* Min humidity..........67-82 percent...except 73-83 percent
ridges.
* 20-foot winds.........
* Valleys/lwr slopes..Light winds becoming southwest around 3 mph
in the afternoon.
* Ridges/upr slopes...Light winds becoming southwest around 3 mph
in the afternoon.
* Mixing height.........1300-2300 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. West winds
around 3 mph in the evening becoming light.
.THURSDAY...Warmer. Mostly sunny. Highs 73 to 83 valleys...68 to
78 ridges. Light winds.
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 50s. West winds
around 3 mph in the evening becoming light.
.FRIDAY...Mostly cloudy with slight chance of showers. Highs 65 to
75 valleys...in the mid 60s ridges. Light winds becoming southwest
around 5 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Lows in the upper 50s. Southwest
winds around 4 mph.
.SATURDAY...Cloudy with slight chance of showers. Highs 62 to
72 valleys...in the lower 60s ridges. Southwest winds around 4 mph.
.SUNDAY...Mostly cloudy. Lows in the mid 50s. Highs 68 to
78 valleys...62 to 72 ridges.
.MONDAY...Partly cloudy. Lows in the mid 50s. Highs 68 to
78 valleys...63 to 73 ridges.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ652-182315-
West Portion of the Olympic Mountains-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Mostly sunny.
* Max temperature.......62-72.
* Min humidity..........61-76 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 2 to 4 mph.
* Ridges/upr slopes...Light winds becoming west around 5 mph in the
afternoon.
* Mixing height.........800-1800 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........14000 Feet.
.TONIGHT...
* Sky/weather...........Partly cloudy.
* Min temperature.......47-57.
* Max humidity..........76-91 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Downslope/downvalley 1 to 3 mph.
* Ridges/upr slopes...West winds around 3 mph in the evening
becoming light.
* Mixing height.........300-900 ft AGL.
* Transport winds.......West around 5 mph shifting to the northeast
after midnight.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........14500 Feet.
.WEDNESDAY...
* Sky/weather...........Mostly sunny.
* Max temperature.......65-75...except 62-72 ridges.
* Min humidity..........62-77 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 1 to 4 mph.
* Ridges/upr slopes...Light winds becoming west around 4 mph in the
afternoon.
* Mixing height.........700 ft AGL increasing to 2700 ft AGL in the
afternoon.
* Transport winds.......South around 5 mph shifting to the
southwest in the afternoon.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........14500 Feet.
.WEDNESDAY NIGHT...Partly cloudy. Freezing level 14500 feet. Lows in
the upper 50s. West winds around 3 mph in the evening becoming
light.
.THURSDAY...Warmer, sunny. Freezing level 14000 feet. Highs 68 to
78. Light winds becoming west around 4 mph in the afternoon.
.THURSDAY NIGHT...Mostly clear. Freezing level 14000 feet. Lows in
the upper 50s. West winds around 3 mph in the evening becoming
light.
.FRIDAY...Partly sunny. Freezing level 13500 feet. Highs 63 to 73.
Light winds becoming southwest around 4 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Freezing level 12500 feet. Lows in
the mid 50s. Southwest winds around 4 mph.
.SATURDAY...Partly sunny. Slight chance of showers in the morning,
then chance of showers in the afternoon. Freezing level 12000 feet.
Highs 55 to 65. Southwest winds around 4 mph.
.SUNDAY...Mostly cloudy. Slight chance of showers. Freezing level
13000 feet. Lows in the lower 50s. Highs 62 to 72 valleys...57 to
67 ridges.
.MONDAY...Partly cloudy. Freezing level 13500 feet. Lows in the
lower 50s. Highs 61 to 71.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ661-182315-
East Portion of the Olympic Mountains-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Mostly sunny.
* Max temperature.......67-77...except 62-72 ridges.
* Min humidity..........59-74 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 2 to 4 mph.
* Ridges/upr slopes...Light winds becoming west around 4 mph in the
afternoon.
* Mixing height.........1000-2000 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........14000 Feet.
.TONIGHT...
* Sky/weather...........Partly cloudy.
* Min temperature.......47-57.
* Max humidity..........78-93 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Downslope/downvalley 1 to 3 mph.
* Ridges/upr slopes...West winds around 3 mph in the evening
becoming light.
* Mixing height.........300-1000 ft AGL.
* Transport winds.......West around 5 mph shifting to the north
after midnight.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........15000 Feet.
.WEDNESDAY...
* Sky/weather...........Mostly sunny.
* Max temperature.......67-77...except 61-71 ridges.
* Min humidity..........60-75 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 1 to 4 mph.
* Ridges/upr slopes...Light winds becoming east around 4 mph in the
afternoon.
* Mixing height.........700 ft AGL increasing to 2700 ft AGL in the
afternoon.
* Transport winds.......Northeast around 5 mph shifting to the
southwest in the afternoon.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........14500 Feet.
.WEDNESDAY NIGHT...Partly cloudy. Freezing level 14500 feet. Lows in
the mid 50s. West winds around 3 mph in the evening becoming light.
.THURSDAY...Sunny. Freezing level 14500 feet. Highs 70 to
80 valleys...63 to 73 ridges. Light winds becoming east around 4 mph
in the afternoon.
.THURSDAY NIGHT...Mostly clear. Freezing level 14000 feet. Lows in
the mid 50s. West winds 3 to 4 mph.
.FRIDAY...Partly sunny with slight chance of showers. Freezing level
13500 feet. Highs 67 to 77 valleys...61 to 71 ridges. Light winds
becoming southwest around 4 mph in the afternoon.
.FRIDAY NIGHT...Partly cloudy with slight chance of showers.
Freezing level 12500 feet. Lows 48 to 58. Southwest winds around
4 mph.
.SATURDAY...Partly sunny. Slight chance of showers in the morning,
then chance of showers in the afternoon. Freezing level 12000 feet.
Highs 60 to 70 valleys...52 to 62 ridges. Southwest winds around
5 mph.
.SUNDAY...Mostly cloudy. Chance of showers. Freezing level
13000 feet. Lows 46 to 56. Highs 63 to 73 valleys...56 to 66 ridges.
.MONDAY...Partly cloudy. Slight chance of showers. Freezing level
13500 feet. Lows 46 to 56. Highs 65 to 75 valleys...57 to 67 ridges.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ653-182315-
Strait of Juan De Fuca and Northwest Interior Lowlands-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Mostly sunny. Patchy fog in the morning.
* Max temperature.......67-77.
* Min humidity..........64-79 percent.
* 20-foot winds.........South winds around 3 mph shifting to the
west in the afternoon.
* Mixing height.........600-1100 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Partly cloudy then becoming mostly cloudy.
* Min temperature.......48-58.
* Max humidity..........81-96 percent.
* 20-foot winds.........West winds around 3 mph in the evening
becoming light.
* Mixing height.........400-600 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......67-77.
* Min humidity..........64-79 percent.
* 20-foot winds.........Light winds becoming northwest around 3 mph
in the afternoon.
* Mixing height.........700-1400 ft AGL.
* Transport winds.......South around 5 mph shifting to the
northwest in the afternoon.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 50s. Northwest
winds around 3 mph in the evening becoming light.
.THURSDAY...Mostly sunny. Highs 69 to 79. Light winds becoming
northwest around 4 mph in the afternoon.
.THURSDAY NIGHT...Partly cloudy. Lows 51 to 61. Northwest winds
around 3 mph in the evening becoming light.
.FRIDAY...Partly sunny with slight chance of showers. Highs 69 to
79. Light winds becoming west around 4 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Chance of showers in the evening,
then slight chance of showers after midnight. Lows 51 to 61.
Southwest winds around 5 mph.
.SATURDAY...Mostly cloudy with slight chance of showers. Highs 65 to
75. South winds around 7 mph.
.SUNDAY...Mostly cloudy. Chance of showers. Lows 50 to 60. Highs
65 to 75.
.MONDAY...Partly cloudy. Lows in the lower 50s. Highs 66 to 76.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ654-182315-
Central and South Puget Sound Lowlands-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Partly sunny. Patchy fog in the morning.
* Max temperature.......69-79.
* Min humidity..........59-74 percent.
* 20-foot winds.........Southwest winds 4 to 7 mph.
* Mixing height.........1200-2200 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Partly cloudy then becoming mostly cloudy.
* Min temperature.......50-60.
* Max humidity..........85-100 percent.
* 20-foot winds.........Southwest winds 3 to 6 mph.
* Mixing height.........500-1400 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......68-78.
* Min humidity..........61-76 percent.
* 20-foot winds.........South winds 3 to 5 mph.
* Mixing height.........1500-2500 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 50s. North winds
around 4 mph in the evening becoming light.
.THURSDAY...Mostly sunny. Highs in the upper 70s. Light winds
becoming northeast around 4 mph in the afternoon.
.THURSDAY NIGHT...Mostly clear. Lows in the mid 50s. North winds
3 to 5 mph.
.FRIDAY...Partly sunny with slight chance of showers. Highs in the
mid 70s. Southwest winds 3 to 6 mph.
.FRIDAY NIGHT...Partly cloudy. Lows 51 to 61. Southwest winds around
9 mph.
.SATURDAY...Mostly cloudy with slight chance of showers. Highs
around 70. Southwest winds around 10 mph.
.SUNDAY...Mostly cloudy. Slight chance of showers. Lows 50 to 60.
Highs 69 to 79.
.MONDAY...Partly cloudy. Lows in the mid 50s. Highs 71 to 81.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ655-182315-
Black Hills and Southwest Interior Lowlands-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Partly sunny.
* Max temperature.......70-80.
* Min humidity..........54-69 percent.
* 20-foot winds.........Light winds becoming west around 4 mph in
the afternoon.
* Mixing height.........1200-2200 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Mostly cloudy.
* Min temperature.......48-58.
* Max humidity..........85-100 percent.
* 20-foot winds.........West winds around 4 mph in the evening
becoming light.
* Mixing height.........500-1500 ft AGL.
* Transport winds.......West 5 to 10 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......71-81.
* Min humidity..........53-68 percent.
* 20-foot winds.........West winds up to 3 mph.
* Mixing height.........1500-2500 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows 49 to 59. Northwest winds
around 3 mph in the evening becoming light.
.THURSDAY...Mostly sunny. Highs in the lower 80s. North winds up to
3 mph.
.THURSDAY NIGHT...Partly cloudy. Slight chance of showers after
midnight. Lows 51 to 61. Northwest winds up to 3 mph.
.FRIDAY...Partly sunny with slight chance of showers. Highs 72 to
82. Light winds becoming west around 3 mph in the afternoon.
.FRIDAY NIGHT...Partly cloudy. Lows in the mid 50s. West winds
around 4 mph.
.SATURDAY...Mostly cloudy. Chance of showers in the afternoon. Highs
around 70. Southwest winds around 5 mph.
.SUNDAY...Mostly cloudy. Lows in the mid 50s. Highs in the mid 70s.
.MONDAY...Partly cloudy. Lows in the lower 50s. Highs in the upper
70s.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ656-182315-
Northeast Puget Sound Lowlands Generally Below 1500 Feet-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Mostly sunny. Patchy fog in the morning.
* Max temperature.......69-79.
* Min humidity..........55-70 percent.
* 20-foot winds.........Light winds becoming west around 3 mph in
the afternoon.
* Mixing height.........800 ft AGL increasing to 2800 ft AGL in the
afternoon.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Partly cloudy then becoming mostly cloudy.
* Min temperature.......50-60.
* Max humidity..........79-94 percent.
* 20-foot winds.........Light winds.
* Mixing height.........400-1300 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......68-78.
* Min humidity..........57-72 percent.
* 20-foot winds.........Light winds becoming west around 3 mph in
the afternoon.
* Mixing height.........1000 ft AGL increasing to 3100 ft AGL in
the afternoon.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows 51 to 61. West winds around
3 mph in the evening becoming light.
.THURSDAY...Warmer, sunny. Highs 76 to 86. Light winds becoming west
around 4 mph in the afternoon.
.THURSDAY NIGHT...Mostly clear. Lows 53 to 63. Light winds.
.FRIDAY...Partly sunny. Highs 75 to 85. Light winds becoming west
around 3 mph in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the upper 50s. Southwest winds around 4 mph.
.SATURDAY...Mostly cloudy. Chance of showers in the morning, then
chance of showers and slight chance of thunderstorms in the
afternoon. Highs 66 to 76. South winds around 5 mph.
.SUNDAY...Mostly cloudy. Slight chance of showers. Lows in the mid
50s. Highs 70 to 80.
.MONDAY...Partly cloudy. Lows in the mid 50s. Highs 72 to 82.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ657-182315-
Southeast Puget Sound Lowlands Generally Below 1500 Feet-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Mostly cloudy then becoming mostly sunny.
Patchy fog in the morning.
* Max temperature.......72-82.
* Min humidity..........51-66 percent.
* 20-foot winds.........Southwest winds 3 to 4 mph.
* Mixing height.........900 ft AGL increasing to 2900 ft AGL in the
afternoon.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.TONIGHT...
* Sky/weather...........Partly cloudy then becoming mostly cloudy.
* Min temperature.......48-58.
* Max humidity..........85-100 percent.
* 20-foot winds.........Southwest winds up to 3 mph.
* Mixing height.........700-1700 ft AGL.
* Transport winds.......Southwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......71-81.
* Min humidity..........55-70 percent.
* 20-foot winds.........Light winds.
* Mixing height.........1700-2700 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 50s. North winds
up to 3 mph.
.THURSDAY...Mostly sunny. Highs in the lower 80s. North winds up to
3 mph.
.THURSDAY NIGHT...Mostly clear. Lows in the upper 50s. Light winds.
.FRIDAY...Partly sunny. Highs in the upper 70s. Light winds.
.FRIDAY NIGHT...Mostly cloudy. Lows 52 to 62. Southwest winds around
3 mph.
.SATURDAY...Mostly cloudy. Slight chance of showers in the morning.
Highs in the lower 70s. Southwest winds around 4 mph.
.SUNDAY...Mostly cloudy with slight chance of showers. Lows 51 to
61. Highs in the mid 70s.
.MONDAY...Partly cloudy. Lows 50 to 60. Highs in the upper 70s.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ658-182315-
West Slopes of the North Cascades Generally above 1500 Feet-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Mostly sunny.
* Max temperature.......70-80...except 64-74 ridges.
* Min humidity..........51-66 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 1 to 5 mph.
* Ridges/upr slopes...Light winds becoming west around 6 mph in the
afternoon.
* Mixing height.........800 ft AGL increasing to 3000 ft AGL in the
afternoon.
* Transport winds.......West 5 to 10 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........13500 Feet.
.TONIGHT...
* Sky/weather...........Partly cloudy then becoming mostly cloudy.
* Min temperature.......50-60...except 45-55 ridges.
* Max humidity..........77-92 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Downslope/downvalley 1 to 3 mph.
* Ridges/upr slopes...West winds 3 to 6 mph.
* Mixing height.........400-1400 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........15000 Feet.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......70-80...except 65-75 ridges.
* Min humidity..........52-67 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 1 to 5 mph.
* Ridges/upr slopes...Light winds becoming west around 5 mph in the
afternoon.
* Mixing height.........900 ft AGL increasing to 3200 ft AGL in the
afternoon.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........14500 Feet.
.WEDNESDAY NIGHT...Partly cloudy. Freezing level 14500 feet. Lows
49 to 59. West winds around 5 mph shifting to the northeast around
3 mph after midnight.
.THURSDAY...Sunny. Freezing level 14500 feet. Highs 74 to
84 valleys...68 to 78 ridges. East winds around 3 mph shifting to
the west around 5 mph in the afternoon.
.THURSDAY NIGHT...Mostly clear. Freezing level 14500 feet. Lows
53 to 63. West winds around 4 mph shifting to the east around 3 mph
after midnight.
.FRIDAY...Partly sunny. Slight chance of showers in the morning.
Freezing level 14000 feet. Highs 72 to 82 valleys...66 to 76 ridges.
East winds around 3 mph shifting to the west around 4 mph in the
afternoon.
.FRIDAY NIGHT...Cooler. Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then chance of showers after
midnight. Freezing level 13500 feet. Lows 48 to 58. Southwest winds
around 5 mph.
.SATURDAY...Mostly cloudy. Chance of showers in the morning, then
chance of showers and slight chance of thunderstorms in the
afternoon. Freezing level 11500 feet. Highs 61 to 71 valleys...52 to
62 ridges. Southwest winds around 6 mph.
.SUNDAY...Mostly cloudy. Chance of showers. Freezing level
12500 feet. Lows in the mid 50s valleys...in the upper 40s ridges.
Highs 65 to 75 valleys...57 to 67 ridges.
.MONDAY...Partly cloudy. Freezing level 13500 feet. Lows 46 to 56.
Highs 68 to 78 valleys...60 to 70 ridges.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
WAZ659-182315-
West Slopes of the Central Cascades Generally above 1500 Feet-
325 AM PDT Tue Aug 18 2026
.TODAY...
* Sky/weather...........Partly sunny.
* Max temperature.......71-81...except 63-73 ridges.
* Min humidity..........53-68 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 1 to 4 mph.
* Ridges/upr slopes...Light winds becoming west around 5 mph in the
afternoon.
* Mixing height.........1200-2200 ft AGL.
* Transport winds.......Northwest 5 to 10 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........14000 Feet.
.TONIGHT...
* Sky/weather...........Partly cloudy.
* Min temperature.......48-58...except 43-53 ridges.
* Max humidity..........75-90 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Downslope/downvalley 1 to 3 mph.
* Ridges/upr slopes...West winds around 4 mph in the evening
becoming light.
* Mixing height.........400-1400 ft AGL.
* Transport winds.......West around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........15000 Feet.
.WEDNESDAY...
* Sky/weather...........Partly sunny.
* Max temperature.......71-81...except 64-74 ridges.
* Min humidity..........54-69 percent.
* 20-foot winds.........
* Valleys/lwr slopes..Upslope/upvalley 1 to 3 mph.
* Ridges/upr slopes...Light winds becoming west around 5 mph in the
afternoon.
* Mixing height.........1200-2200 ft AGL.
* Transport winds.......Northwest around 5 mph.
* CWR (>0.25)...........0 percent.
* Chance of Lightning...0 percent.
* Freezing level........15000 Feet.
.WEDNESDAY NIGHT...Partly cloudy. Freezing level 15000 feet. Lows
48 to 58. Northwest winds around 3 mph in the evening becoming
light.
.THURSDAY...Sunny. Freezing level 14500 feet. Highs 74 to
84 valleys...68 to 78 ridges. Light winds becoming west around 4 mph
in the afternoon.
.THURSDAY NIGHT...Partly cloudy. Freezing level 14500 feet. Lows
52 to 62. Northwest winds around 3 mph in the evening becoming
light.
.FRIDAY...Partly sunny. Freezing level 14000 feet. Highs 71 to
81 valleys...64 to 74 ridges. Light winds becoming west around 4 mph
in the afternoon.
.FRIDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Freezing level 13500 feet. Lows 48 to 58. West winds
around 4 mph.
.SATURDAY...Mostly cloudy with slight chance of showers. Freezing
level 12000 feet. Highs 62 to 72 valleys...53 to 63 ridges. West
winds around 6 mph.
.SUNDAY...Mostly cloudy. Chance of showers. Freezing level
13500 feet. Lows 49 to 59 valleys...44 to 54 ridges. Highs 67 to
77 valleys...59 to 69 ridges.
.MONDAY...Partly cloudy. Freezing level 14000 feet. Lows 47 to 57.
Highs 69 to 79 valleys...61 to 71 ridges.
.8 TO 14 Day Outlook
Above normal temperatures and near normal precipitation.
$$
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