


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Seattle/Tacoma, WA
Issued by NWS Seattle/Tacoma, WA
092 FNUS56 KSEW 181418 FWFSEW Fire Weather Planning Forecast for Western Washington National Weather Service Seattle WA 718 AM PDT Mon Aug 18 2025 .DISCUSSION...A few showers will pass through the area this morning, with a chance of showers being retained along the coast today and Tuesday. The remaining areas will stay dry, with warmer temperatures expected towards the end of the week with lower relative humidities. Forecast for 20 foot wind speed (valleys and ridge tops) are 10 minute averages reflecting RAWS winds. WAZ649-182330- North and Central Coastal Strip- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. Slight chance of rain in the afternoon. * Max temperature.......60-70. * Min humidity..........69-84 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds 4 to 8 mph. * Ridges/upr slopes...South winds 4 to 8 mph. * Mixing height.........700-1700 ft AGL. * Transport winds.......South 10 to 15 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of rain. * Min temperature.......Around 57. * Max humidity..........90-near 100 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds 3 to 6 mph. * Ridges/upr slopes...South winds 4 to 7 mph. * Mixing height.........500-900 ft AGL. * Transport winds.......South around 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. Chance of rain. * Max temperature.......60-70. * Min humidity..........74-89 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds 3 to 6 mph. * Ridges/upr slopes...South winds 3 to 6 mph. * Mixing height.........700-1400 ft AGL. * Transport winds.......South around 10 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...3 percent. .TUESDAY NIGHT...Mostly cloudy. Slight chance of rain in the evening. Lows in the mid 50s. West winds around 3 mph in the evening becoming light. .WEDNESDAY...Mostly sunny. Highs 64 to 74. Light winds becoming northwest around 6 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. Northwest winds 4 to 7 mph. .THURSDAY...Sunny. Highs 67 to 77. North winds 3 to 6 mph. .THURSDAY NIGHT...Mostly clear. Lows in the lower 50s. North winds around 4 mph. .FRIDAY...Sunny. Highs 70 to 80. North winds around 3 mph. .SATURDAY...Mostly clear. Lows in the mid 50s. Highs 68 to 78. .SUNDAY...Partly cloudy. Lows in the mid 50s. Highs 64 to 74. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ650-182330- North Coastal Lowlands- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. Slight chance of rain in the afternoon. * Max temperature.......62-72...except 59-69 ridges. * Min humidity..........62-77 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds 3 to 6 mph. * Ridges/upr slopes...South winds 3 to 6 mph. * Mixing height.........1500-2500 ft AGL. * Transport winds.......South 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...4 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of rain. * Min temperature.......49-59. * Max humidity..........80-95 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds 3 to 5 mph. * Ridges/upr slopes...South winds 3 to 6 mph. * Mixing height.........700-1500 ft AGL. * Transport winds.......South around 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. Chance of rain. * Max temperature.......62-72. * Min humidity..........64-79 percent...except 69-83 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..South winds 3 to 5 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........1200-2200 ft AGL. * Transport winds.......South around 10 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...4 percent. .TUESDAY NIGHT...Mostly cloudy. Slight chance of rain in the evening. Lows in the lower 50s. West winds around 3 mph in the evening becoming light. .WEDNESDAY...Mostly sunny. Highs 67 to 77 valleys...62 to 72 ridges. Light winds becoming west around 4 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. Northwest winds around 4 mph in the evening becoming light. .THURSDAY...Sunny. Highs 71 to 81. Light winds becoming northwest around 4 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 50 to 60. North winds around 3 mph. .FRIDAY...Sunny. Highs 75 to 85. Light winds. .SATURDAY...Mostly clear. Lows 52 to 62. Highs 74 to 84. .SUNDAY...Mostly clear. Lows in the mid 50s. Highs 69 to 79. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ651-182330- Central Coastal Lowlands- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......62-72. * Min humidity..........61-76 percent...except 66-81 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..Light winds becoming southwest around 5 mph in the afternoon. * Ridges/upr slopes...Light winds becoming southwest around 5 mph in the afternoon. * Mixing height.........1000 ft AGL increasing to 3100 ft AGL in the afternoon. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......Around 54. * Max humidity..........85-100 percent. * 20-foot winds......... * Valleys/lwr slopes..Southwest winds around 3 mph in the evening becoming light. * Ridges/upr slopes...West winds around 3 mph in the evening becoming light. * Mixing height.........500-1500 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. Slight chance of rain. * Max temperature.......63-73. * Min humidity..........63-78 percent...except 68-83 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..Light winds becoming west around 4 mph in the afternoon. * Ridges/upr slopes...Light winds becoming west around 3 mph in the afternoon. * Mixing height.........700 ft AGL increasing to 2800 ft AGL in the afternoon. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. West winds around 4 mph in the evening becoming light. .WEDNESDAY...Warmer. Mostly sunny. Highs 71 to 81 valleys...65 to 75 ridges. Light winds becoming west around 4 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. West winds around 4 mph in the evening becoming light. .THURSDAY...Sunny. Highs 76 to 86 valleys...70 to 80 ridges. Light winds becoming northwest around 3 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows in the lower 50s. Light winds. .FRIDAY...Sunny. Highs 80 to 90 valleys...75 to 85 ridges. Light winds. .SATURDAY...Mostly clear. Lows 51 to 61. Highs 78 to 88 valleys... 73 to 83 ridges. .SUNDAY...Mostly clear. Lows in the mid 50s. Highs 74 to 84 valleys...69 to 79 ridges. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ652-182330- West Portion of the Olympic Mountains- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. Slight chance of rain in the afternoon. * Max temperature.......59-69...except 55-65 ridges. * Min humidity..........64-79 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 2 to 5 mph. * Ridges/upr slopes...South winds 3 to 6 mph. * Mixing height.........1200-2200 ft AGL. * Transport winds.......South 5 to 10 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...4 percent. * Freezing level........10000 Feet. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of rain. * Min temperature.......45-55. * Max humidity..........75-90 percent. * 20-foot winds......... * Valleys/lwr slopes..Downslope/downvalley 3 to 4 mph. * Ridges/upr slopes...South winds 3 to 5 mph. * Mixing height.........300-1000 ft AGL. * Transport winds.......South 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...4 percent. * Freezing level........10500 Feet. .TUESDAY... * Sky/weather...........Mostly cloudy. Slight chance of rain. * Max temperature.......61-71...except 57-67 ridges. * Min humidity..........66-81 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 2 to 4 mph. * Ridges/upr slopes...South winds around 3 mph shifting to the southwest around 4 mph in the afternoon. * Mixing height.........1000-2000 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. * Freezing level........10500 Feet. .TUESDAY NIGHT...Mostly cloudy. Slight chance of rain in the evening. Freezing level 11000 feet. Lows 47 to 57. West winds around 3 mph in the evening becoming light. .WEDNESDAY...Sunny. Freezing level 11500 feet. Highs 63 to 73 valleys...58 to 68 ridges. Light winds becoming west around 4 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Freezing level 12500 feet. Lows in the lower 50s. Northwest winds around 4 mph shifting to the northeast around 3 mph after midnight. .THURSDAY...Sunny. Freezing level 13500 feet. Highs 68 to 78 valleys...63 to 73 ridges. Northeast winds around 4 mph shifting to the west in the afternoon. .THURSDAY NIGHT...Clear. Freezing level 14500 feet. Lows in the mid 50s. North winds around 3 mph. .FRIDAY...Warmer, sunny. Freezing level 15000 feet. Highs 74 to 84 valleys...69 to 79 ridges. North winds around 3 mph. .SATURDAY...Clear. Freezing level 15000 feet. Lows in the upper 50s. Highs 72 to 82. .SUNDAY...Clear. Freezing level 14500 feet. Lows in the upper 50s. Highs 69 to 79 valleys...64 to 74 ridges. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ661-182330- East Portion of the Olympic Mountains- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. Slight chance of rain in the afternoon. * Max temperature.......61-71...except 54-64 ridges. * Min humidity..........58-73 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 2 to 5 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........1300-2300 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...4 percent. * Freezing level........10000 Feet. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......47-57...except 44-54 ridges. * Max humidity..........76-91 percent...except 70-85 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..Downslope/downvalley 2 to 4 mph. * Ridges/upr slopes...Southwest winds 3 to 5 mph. * Mixing height.........400-1000 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. * Freezing level........11000 Feet. .TUESDAY... * Sky/weather...........Mostly cloudy. Slight chance of rain. * Max temperature.......62-72...except 55-65 ridges. * Min humidity..........62-77 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 2 to 3 mph. * Ridges/upr slopes...Southwest winds 3 to 5 mph. * Mixing height.........900-1900 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. * Freezing level........11000 Feet. .TUESDAY NIGHT...Mostly cloudy. Slight chance of rain in the evening. Freezing level 11000 feet. Lows 46 to 56. West winds around 3 mph in the evening becoming light. .WEDNESDAY...Mostly sunny. Freezing level 11500 feet. Highs 63 to 73 valleys...55 to 65 ridges. West winds 3 to 5 mph. .WEDNESDAY NIGHT...Mostly clear. Freezing level 12500 feet. Lows 45 to 55. Northwest winds 3 to 6 mph. .THURSDAY...Sunny. Freezing level 13500 feet. Highs 68 to 78 valleys...61 to 71 ridges. Northeast winds 3 to 6 mph. .THURSDAY NIGHT...Clear. Freezing level 14500 feet. Lows 49 to 59. North winds around 3 mph. .FRIDAY...Sunny. Freezing level 15000 feet. Highs 74 to 84 valleys... 67 to 77 ridges. North winds around 3 mph. .SATURDAY...Clear. Freezing level 15000 feet. Lows 53 to 63. Highs 74 to 84 valleys...67 to 77 ridges. .SUNDAY...Clear. Freezing level 14500 feet. Lows in the mid 50s. Highs 70 to 80 valleys...63 to 73 ridges. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ653-182330- Strait of Juan De Fuca and Northwest Interior Lowlands- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......66-76. * Min humidity..........53-68 percent. * 20-foot winds.........South winds 3 to 6 mph. * Mixing height.........700-1700 ft AGL. * Transport winds.......South around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......50-60. * Max humidity..........76-91 percent. * 20-foot winds.........West winds around 3 mph in the evening becoming light. * Mixing height.........500-700 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. Slight chance of rain. * Max temperature.......66-76. * Min humidity..........58-73 percent. * 20-foot winds.........South winds around 3 mph shifting to the southwest around 4 mph in the afternoon. * Mixing height.........600-1600 ft AGL. * Transport winds.......South around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .TUESDAY NIGHT...Mostly cloudy. Slight chance of rain in the evening. Lows in the mid 50s. West winds 3 to 5 mph. .WEDNESDAY...Mostly sunny. Highs 67 to 77. Light winds becoming northwest around 5 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. West winds 3 to 5 mph. .THURSDAY...Sunny. Highs 69 to 79. Northwest winds 3 to 6 mph. .THURSDAY NIGHT...Clear. Lows in the mid 50s. Northwest winds around 3 mph. .FRIDAY...Sunny. Highs 73 to 83. Northwest winds around 3 mph. .SATURDAY...Mostly clear. Lows in the upper 50s. Highs 73 to 83. .SUNDAY...Mostly clear. Lows in the upper 50s. Highs 71 to 81. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ654-182330- Central and South Puget Sound Lowlands- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......67-77. * Min humidity..........49-64 percent. * 20-foot winds.........Southwest winds 4 to 7 mph. * Mixing height.........1100 ft AGL increasing to 4100 ft AGL in the afternoon. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...2 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......51-61. * Max humidity..........76-91 percent. * 20-foot winds.........Southwest winds 3 to 6 mph. * Mixing height.........700-1700 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. .TUESDAY... * Sky/weather...........Mostly cloudy. * Max temperature.......67-77. * Min humidity..........54-69 percent. * 20-foot winds.........Light winds becoming southwest around 5 mph in the afternoon. * Mixing height.........800 ft AGL increasing to 3300 ft AGL in the afternoon. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...2 percent. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. Northwest winds around 5 mph in the evening becoming light. .WEDNESDAY...Mostly sunny. Highs 71 to 81. Light winds becoming north around 5 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. North winds 3 to 6 mph. .THURSDAY...Sunny. Highs 74 to 84. North winds 3 to 7 mph. .THURSDAY NIGHT...Clear. Lows in the mid 50s. North winds around 5 mph. .FRIDAY...Sunny. Highs 79 to 89. North winds around 4 mph. .SATURDAY...Clear. Lows 53 to 63. Highs 79 to 89. .SUNDAY...Mostly clear. Lows in the upper 50s. Highs 77 to 87. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ655-182330- Black Hills and Southwest Interior Lowlands- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......66-76. * Min humidity..........53-68 percent. * 20-foot winds.........Light winds becoming southwest around 4 mph in the afternoon. * Mixing height.........1200 ft AGL increasing to 4400 ft AGL in the afternoon. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...2 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......47-57. * Max humidity..........85-100 percent. * 20-foot winds.........West winds around 3 mph in the evening becoming light. * Mixing height.........900-1900 ft AGL. * Transport winds.......West around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. .TUESDAY... * Sky/weather...........Partly sunny. * Max temperature.......67-77. * Min humidity..........54-69 percent. * 20-foot winds.........Light winds becoming west around 3 mph in the afternoon. * Mixing height.........800 ft AGL increasing to 3600 ft AGL in the afternoon. * Transport winds.......West around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. Northwest winds around 4 mph in the evening becoming light. .WEDNESDAY...Mostly sunny. Highs in the upper 70s. Light winds becoming northwest around 4 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. Northwest winds around 4 mph in the evening becoming light. .THURSDAY...Sunny. Highs 78 to 88. Light winds becoming north around 5 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 49 to 59. North winds around 3 mph. .FRIDAY...Warmer, sunny. Highs 84 to 94. North winds around 3 mph. .SATURDAY...Mostly clear. Lows 52 to 62. Highs in the upper 80s. .SUNDAY...Mostly clear. Lows 51 to 61. Highs in the lower 80s. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ656-182330- Northeast Puget Sound Lowlands Generally Below 1500 Feet- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......64-74. * Min humidity..........51-66 percent. * 20-foot winds.........Light winds becoming southwest around 4 mph in the afternoon. * Mixing height.........1500 ft AGL increasing to 4400 ft AGL in the afternoon. * Transport winds.......South 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...4 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......49-59. * Max humidity..........78-93 percent. * 20-foot winds.........Southwest winds around 3 mph in the evening becoming light. * Mixing height.........1000-2000 ft AGL. * Transport winds.......South around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. .TUESDAY... * Sky/weather...........Partly sunny. * Max temperature.......64-74. * Min humidity..........52-67 percent. * 20-foot winds.........Light winds becoming southwest around 4 mph in the afternoon. * Mixing height.........1300 ft AGL increasing to 3500 ft AGL in the afternoon. * Transport winds.......South around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. West winds around 4 mph in the evening becoming light. .WEDNESDAY...Warmer. Mostly sunny. Highs 70 to 80. Light winds becoming west around 4 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. West winds around 4 mph shifting to the northeast around 3 mph after midnight. .THURSDAY...Sunny. Highs 75 to 85. Northeast winds around 3 mph shifting to the northwest around 4 mph in the afternoon. .THURSDAY NIGHT...Mostly clear. Lows 51 to 61. North winds around 3 mph. .FRIDAY...Warmer, sunny. Highs 81 to 91. North winds around 3 mph. .SATURDAY...Mostly clear. Lows 54 to 64. Highs 80 to 90. .SUNDAY...Mostly clear. Lows 53 to 63. Highs 76 to 86. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ657-182330- Southeast Puget Sound Lowlands Generally Below 1500 Feet- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......69-79. * Min humidity..........48-63 percent. * 20-foot winds.........Light winds becoming southwest around 3 mph in the afternoon. * Mixing height.........1300 ft AGL increasing to 4500 ft AGL in the afternoon. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...2 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......48-58. * Max humidity..........82-97 percent. * 20-foot winds.........West winds around 3 mph in the evening becoming light. * Mixing height.........1100-2100 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. .TUESDAY... * Sky/weather...........Partly sunny. * Max temperature.......69-79. * Min humidity..........47-62 percent. * 20-foot winds.........Light winds becoming west around 3 mph in the afternoon. * Mixing height.........1000 ft AGL increasing to 3500 ft AGL in the afternoon. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. Northwest winds around 3 mph in the evening becoming light. .WEDNESDAY...Mostly sunny. Highs in the upper 70s. Light winds becoming northwest around 4 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows 49 to 59. North winds around 4 mph in the evening becoming light. .THURSDAY...Sunny. Highs in the upper 70s. Light winds becoming north around 5 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows in the mid 50s. Northeast winds around 3 mph. .FRIDAY...Sunny. Highs in the mid 80s. Light winds. .SATURDAY...Mostly clear. Lows in the upper 50s. Highs in the mid 80s. .SUNDAY...Mostly clear. Lows in the upper 50s. Highs in the lower 80s. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ658-182330- West Slopes of the North Cascades Generally above 1500 Feet- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......64-74...except 57-67 ridges. * Min humidity..........49-64 percent...except 54-69 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 2 to 5 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........1000 ft AGL increasing to 3100 ft AGL in the afternoon. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. * Freezing level........11000 Feet. .TONIGHT... * Sky/weather...........Mostly cloudy. * Min temperature.......48-58...except 43-53 ridges. * Max humidity..........76-91 percent. * 20-foot winds......... * Valleys/lwr slopes..Downslope/downvalley 2 to 3 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........600-1400 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. * Freezing level........11500 Feet. .TUESDAY... * Sky/weather...........Partly sunny. * Max temperature.......65-75...except 58-68 ridges. * Min humidity..........54-69 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 2 to 4 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........1200-2200 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. * Freezing level........11500 Feet. .TUESDAY NIGHT...Mostly cloudy. Freezing level 11500 feet. Lows in the lower 50s valleys...in the upper 40s ridges. West winds 3 to 6 mph. .WEDNESDAY...Mostly sunny. Freezing level 11500 feet. Highs 65 to 75 valleys...57 to 67 ridges. West winds 3 to 6 mph. .WEDNESDAY NIGHT...Mostly clear. Freezing level 12000 feet. Lows in the lower 50s valleys...in the mid 40s ridges. West winds around 6 mph shifting to the northeast around 5 mph after midnight. .THURSDAY...Warmer, sunny. Freezing level 13000 feet. Highs 71 to 81 valleys...64 to 74 ridges. Northeast winds around 4 mph shifting to the west in the afternoon. .THURSDAY NIGHT...Mostly clear. Freezing level 14000 feet. Lows 49 to 59. North winds around 4 mph. .FRIDAY...Warmer, sunny. Freezing level 14500 feet. Highs 78 to 88 valleys...71 to 81 ridges. East winds around 4 mph. .SATURDAY...Mostly clear. Freezing level 15000 feet. Lows 52 to 62. Highs 77 to 87 valleys...71 to 81 ridges. .SUNDAY...Mostly clear. Freezing level 14500 feet. Lows 51 to 61. Highs 73 to 83 valleys...66 to 76 ridges. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ WAZ659-182330- West Slopes of the Central Cascades Generally above 1500 Feet- 718 AM PDT Mon Aug 18 2025 .Today... * Sky/weather...........Partly sunny. * Max temperature.......65-75...except 57-67 ridges. * Min humidity..........53-68 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.........1100 ft AGL increasing to 3200 ft AGL in the afternoon. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...2 percent. * Freezing level........12000 Feet. .TONIGHT... * Sky/weather...........Partly cloudy then becoming mostly cloudy. * Min temperature.......45-55...except 41-51 ridges. * Max humidity..........76-91 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.........600-1600 ft AGL. * Transport winds.......West around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. * Freezing level........12500 Feet. .TUESDAY... * Sky/weather...........Partly sunny. * Max temperature.......67-77...except 58-68 ridges. * Min humidity..........50-65 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.........700 ft AGL increasing to 2800 ft AGL in the afternoon. * Transport winds.......West around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...0 percent. * Freezing level........12500 Feet. .TUESDAY NIGHT...Mostly cloudy. Freezing level 12000 feet. Lows 46 to 56. Northwest winds 3 to 6 mph. .WEDNESDAY...Mostly sunny. Freezing level 12000 feet. Highs 66 to 76 valleys...58 to 68 ridges. Light winds becoming northwest around 5 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Freezing level 13000 feet. Lows 44 to 54. Northwest winds around 5 mph shifting to the northeast around 3 mph after midnight. .THURSDAY...Warmer, sunny. Freezing level 14000 feet. Highs 72 to 82 valleys...65 to 75 ridges. Northeast winds around 3 mph shifting to the northwest around 4 mph in the afternoon. .THURSDAY NIGHT...Mostly clear. Freezing level 15000 feet. Lows 50 to 60. Northeast winds around 4 mph. .FRIDAY...Warmer, sunny. Freezing level 15500 feet. Highs 80 to 90 valleys...73 to 83 ridges. Northeast winds around 3 mph. .SATURDAY...Mostly clear. Freezing level 15000 feet. Lows 54 to 64. Highs 79 to 89 valleys...72 to 82 ridges. .SUNDAY...Mostly clear. Freezing level 15000 feet. Lows 52 to 62. Highs 74 to 84 valleys...67 to 77 ridges. .8 TO 14 day Outlook for Aug 25 - 31, 2025 Above normal temperatures and above normal precipitation. $$ www.weather.gov/seattle