FNUS56 KSEW 221055 FWFSEW Fire Weather Planning Forecast for Western Washington National Weather Service Seattle WA 355 AM PDT Sat Aug 22 2026 ...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 5 PM PDT THIS AFTERNOON FOR LIGHTNING AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONE 659... ...RED FLAG WARNING NOW IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING FOR LIGHTNING AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONE 658... .DISCUSSION...Weak upper level low off the Central Oregon coast will continue to weaken and move northeast eventually moving inland as an upper level trough Sunday morning. Chance of convection over the Cascades later this morning into the early evening hours. Upper level ridge building in behind trough later Sunday will move east Monday. Western Washington on the backside of the ridge Tuesday. Low level onshore flow pattern later Sunday through Tuesday will result in good relative humidity recoveries in the overnight hours. Another upper level trough arriving Wednesday or Thursday hanging around into Friday. Forecast for 20 foot wind speed (valleys and ridge tops) are 10 minute averages reflecting RAWS winds. WAZ649-222315- North and Central Coastal Strip- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Mostly cloudy. * Max temperature.......56-66. * Min humidity..........79-94 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds 5 to 8 mph. * Ridges/upr slopes...South winds 5 to 8 mph. * Mixing height.........900-1600 ft AGL. * Transport winds.......South around 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...8 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers in the evening. Chance of showers after midnight. * Min temperature.......52-62. * Max humidity..........94-100 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds around 4 mph in the evening becoming light. * Ridges/upr slopes...South winds around 3 mph in the evening becoming light. * Mixing height.........500-900 ft AGL. * Transport winds.......South around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY... * Sky/weather...........Partly sunny. * Max temperature.......58-68. * Min humidity..........79-94 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.........700-1700 ft AGL. * Transport winds.......West 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 50s. Northwest winds 4 to 7 mph. .MONDAY...Warmer. Mostly sunny. Highs 68 to 78. North winds 3 to 7 mph. .MONDAY NIGHT...Partly cloudy. Lows in the mid 50s. Northwest winds 4 to 8 mph. .TUESDAY...Partly sunny. Highs 65 to 75. Northwest winds 3 to 6 mph. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. West winds around 5 mph. .WEDNESDAY...Mostly cloudy with a chance of showers. Highs in the mid 60s. Southwest winds around 6 mph. .THURSDAY...Mostly cloudy. Chance of showers. Lows in the mid 50s. Highs in the mid 60s. .FRIDAY...Mostly cloudy. Slight chance of showers. Lows in the lower 50s. Highs in the mid 60s. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ650-222315- North Coastal Lowlands- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Partly sunny. * Max temperature.......58-68. * Min humidity..........76-91 percent. * 20-foot winds......... * Valleys/lwr slopes..South winds 3 to 6 mph. * Ridges/upr slopes...South winds 3 to 6 mph. * Mixing height.........900-1900 ft AGL. * Transport winds.......South around 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...9 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers. * Min temperature.......50-60. * Max humidity..........82-97 percent...except 87-near 100 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..South winds up to 3 mph. * Ridges/upr slopes...Southwest winds around 3 mph in the evening becoming light. * Mixing height.........400-1200 ft AGL. * Transport winds.......South around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...4 percent. .SUNDAY... * Sky/weather...........Partly sunny. * Max temperature.......61-71. * Min humidity..........74-89 percent. * 20-foot winds......... * Valleys/lwr slopes..Light winds becoming west around 4 mph in the afternoon. * Ridges/upr slopes...Light winds becoming west around 4 mph in the afternoon. * Mixing height.........1100-2100 ft AGL. * Transport winds.......West 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the lower 50s. Northwest winds 3 to 5 mph. .MONDAY...Warmer, sunny. Highs 73 to 83. Light winds becoming northwest around 4 mph in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows 52 to 62. Northwest winds around 4 mph in the evening becoming light. .TUESDAY...Mostly sunny. Highs 71 to 81. Light winds becoming west around 4 mph in the afternoon. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. West winds around 4 mph. .WEDNESDAY...Cooler. Partly sunny. Slight chance of showers in the morning, then chance of showers in the afternoon. Highs in the mid 60s. Southwest winds around 4 mph. .THURSDAY...Mostly cloudy. Chance of showers. Lows in the lower 50s. Highs in the mid 60s. .FRIDAY...Mostly cloudy. Slight chance of showers. Lows in the lower 50s. Highs in the mid 60s. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ651-222315- Central Coastal Lowlands- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Partly sunny. * Max temperature.......59-69. * Min humidity..........73-88 percent...except 89 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..Southwest winds 3 to 6 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........1500-2500 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...5 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers in the evening. Chance of showers after midnight. * Min temperature.......50-60. * Max humidity..........85-100 percent. * 20-foot winds......... * Valleys/lwr slopes..Southwest winds around 3 mph in the evening becoming light. * Ridges/upr slopes...Southwest winds up to 3 mph. * Mixing height.........700-1700 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY... * Sky/weather...........Mostly cloudy. * Max temperature.......62-72. * Min humidity..........68-83 percent...except 79-87 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.........900 ft AGL increasing to 3400 ft AGL in the afternoon. * Transport winds.......West 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 50s. West winds around 4 mph in the evening becoming light. .MONDAY...Warmer. Mostly sunny. Highs in the lower 80s. Light winds becoming north around 3 mph in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows in the upper 50s. Northwest winds around 3 mph in the evening becoming light. .TUESDAY...Mostly sunny. Highs 73 to 83. Light winds becoming west around 4 mph in the afternoon. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 50s. West winds around 6 mph. .WEDNESDAY...Cooler. Mostly cloudy. Slight chance of showers in the morning, then chance of showers in the afternoon. Highs in the upper 60s valleys...in the lower 60s ridges. Southwest winds around 6 mph. .THURSDAY...Mostly cloudy. Slight chance of showers. Lows in the lower 50s. Highs 63 to 73 valleys...in the lower 60s ridges. .FRIDAY...Mostly cloudy. Slight chance of showers. Lows in the lower 50s. Highs 64 to 74 valleys...in the lower 60s ridges. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ652-222315- West Portion of the Olympic Mountains- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Partly sunny. Slight chance of showers in the afternoon. * Max temperature.......57-67...except 54-64 ridges. * Min humidity..........68-83 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 3 to 4 mph. * Ridges/upr slopes...Southwest winds 3 to 5 mph. * Mixing height.........800-1800 ft AGL. * Transport winds.......South 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...11 percent. * Freezing level........12000 Feet. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers. * Min temperature.......45-55. * Max humidity..........78-93 percent. * 20-foot winds......... * Valleys/lwr slopes..Downslope/downvalley 1 to 3 mph. * Ridges/upr slopes...Southwest winds around 3 mph in the evening becoming light. * Mixing height.........500-1200 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...5 percent. * Freezing level........11000 Feet. .SUNDAY... * Sky/weather...........Partly sunny. * Max temperature.......60-70...except 56-66 ridges. * Min humidity..........67-82 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.........900 ft AGL increasing to 3000 ft AGL in the afternoon. * Transport winds.......West around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. * Freezing level........11000 Feet. .SUNDAY NIGHT...Mostly clear. Freezing level 13000 feet. Lows in the lower 50s. West winds around 4 mph shifting to the northeast around 3 mph after midnight. .MONDAY...Warmer, sunny. Freezing level 13000 feet. Highs 72 to 82 valleys...67 to 77 ridges. Northeast winds around 5 mph shifting to the west around 4 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Freezing level 13500 feet. Lows in the upper 50s. Northwest winds around 3 mph in the evening becoming light. .TUESDAY...Sunny. Freezing level 13500 feet. Highs 69 to 79. Light winds becoming west around 5 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Freezing level 13000 feet. Lows in the mid 50s. West winds around 4 mph. .WEDNESDAY...Partly sunny. Slight chance of showers in the morning, then chance of showers in the afternoon. Freezing level 11500 feet. Highs 56 to 66. Southwest winds around 5 mph. .THURSDAY...Mostly cloudy. Chance of showers. Freezing level 9500 feet. Lows in the upper 40s. Highs 55 to 65. .FRIDAY...Partly cloudy. Slight chance of showers. Freezing level 10000 feet. Lows in the upper 40s. Highs 56 to 66. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ661-222315- East Portion of the Olympic Mountains- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Mostly sunny. Chance of showers in the afternoon. * Max temperature.......60-70...except 54-64 ridges. * Min humidity..........66-81 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 3 to 5 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........900-1900 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...12 percent. * Freezing level........12500 Feet. .TONIGHT... * Sky/weather...........Partly cloudy then becoming mostly cloudy. Slight chance of showers. * Min temperature.......47-57...except 44-54 ridges. * Max humidity..........79-94 percent. * 20-foot winds......... * Valleys/lwr slopes..Downslope/downvalley 2 to 4 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........400-1200 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...6 percent. * Freezing level........11000 Feet. .SUNDAY... * Sky/weather...........Partly sunny. * Max temperature.......62-72...except 55-65 ridges. * Min humidity..........66-81 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 3 to 4 mph. * Ridges/upr slopes...West winds 3 to 5 mph. * Mixing height.........900 ft AGL increasing to 3000 ft AGL in the afternoon. * Transport winds.......West around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. * Freezing level........11000 Feet. .SUNDAY NIGHT...Partly cloudy. Freezing level 13000 feet. Lows 46 to 56. Northwest winds 3 to 5 mph. .MONDAY...Warmer, sunny. Freezing level 13000 feet. Highs 72 to 82 valleys...64 to 74 ridges. North winds 3 to 6 mph. .MONDAY NIGHT...Mostly clear. Freezing level 13500 feet. Lows in the mid 50s. Northwest winds 3 to 4 mph. .TUESDAY...Sunny. Freezing level 13500 feet. Highs 72 to 82 valleys...66 to 76 ridges. Light winds becoming west around 5 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Freezing level 13000 feet. Lows 48 to 58. West winds around 4 mph. .WEDNESDAY...Partly sunny. Slight chance of showers in the morning, then chance of showers in the afternoon. Freezing level 11500 feet. Highs 61 to 71 valleys...53 to 63 ridges. Southwest winds around 5 mph. .THURSDAY...Partly cloudy. Chance of showers. Freezing level 9500 feet. Lows in the lower 50s valleys...41 to 51 ridges. Highs 59 to 69 valleys...51 to 61 ridges. .FRIDAY...Partly cloudy. Slight chance of showers. Freezing level 10000 feet. Lows 43 to 53. Highs 60 to 70 valleys...52 to 62 ridges. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ653-222315- Strait of Juan De Fuca and Northwest Interior Lowlands- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Partly sunny. Chance of showers and slight chance of thunderstorms in the afternoon. * Max temperature.......63-73. * Min humidity..........69-84 percent. * 20-foot winds.........Southwest winds 4 to 7 mph. * Mixing height.........600-1100 ft AGL. * Transport winds.......Southwest around 10 mph. * CWR (>0.25)...........10 percent. * Chance of Lightning...14 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers in the evening. Chance of showers after midnight. * Min temperature.......49-59. * Max humidity..........80-95 percent. * 20-foot winds.........Southwest winds 3 to 6 mph. * Mixing height.........400-600 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...7 percent. .SUNDAY... * Sky/weather...........Partly sunny. *Max temperature.......65-75. * Min humidity..........65-80 percent. * 20-foot winds.........South winds around 4 mph shifting to the southwest around 5 mph in the afternoon. * Mixing height.........700-1600 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .SUNDAY NIGHT...Partly cloudy. Lows 49 to 59. West winds 3 to 5 mph. .MONDAY...Warmer, sunny. Highs 71 to 81. Northwest winds 3 to 6 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 50s. Northwest winds around 4 mph in the evening becoming light. .TUESDAY...Mostly sunny. Highs 73 to 83. Light winds becoming northwest around 4 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows 50 to 60. West winds around 6 mph. .WEDNESDAY...Partly sunny. Slight chance of showers in the morning, then chance of showers in the afternoon. Highs 65 to 75. Southwest winds around 7 mph. .THURSDAY...Mostly cloudy. Chance of showers. Lows 48 to 58. Highs 63 to 73. .FRIDAY...Partly cloudy. Slight chance of showers. Lows 47 to 57. Highs 63 to 73. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ654-222315- Central and South Puget Sound Lowlands- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Mostly sunny. * Max temperature.......64-74. * Min humidity..........61-76 percent. * 20-foot winds.........Southwest winds 6 to 9 mph. * Mixing height.........1600-2600 ft AGL. * Transport winds.......Southwest around 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...8 percent. .TONIGHT... * Sky/weather...........Partly cloudy then becoming mostly cloudy. * Min temperature.......50-60. * Max humidity..........82-97 percent. * 20-foot winds.........Southwest winds 4 to 7 mph. * Mixing height.........800-1800 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY... * Sky/weather...........Partly sunny. * Max temperature.......65-75. * Min humidity..........62-77 percent. * 20-foot winds.........Southwest winds 3 to 6 mph. * Mixing height.........1400 ft AGL increasing to 4200 ft AGL in the afternoon. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...1 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 50s. North winds 4 to 7 mph. .MONDAY...Warmer, sunny. Highs 75 to 85. North winds 5 to 9 mph. .MONDAY NIGHT...Mostly clear. Lows in the mid 50s. Northeast winds around 6 mph in the evening becoming light. .TUESDAY...Sunny. Highs in the lower 80s. Light winds becoming north around 4 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 50s. Southwest winds around 7 mph. .WEDNESDAY...Cooler. Partly sunny. Slight chance of showers in the afternoon. Highs in the lower 70s. Southwest winds around 9 mph. .THURSDAY...Mostly cloudy. Slight chance of showers. Lows 48 to 58. Highs 66 to 76. .FRIDAY...Partly cloudy. Slight chance of showers. Lows 47 to 57. Highs 68 to 78. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ655-222315- Black Hills and Southwest Interior Lowlands- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Partly sunny. * Max temperature.......65-75. * Min humidity..........63-78 percent. * 20-foot winds.........Southwest winds 3 to 5 mph. * Mixing height.........1200 ft AGL increasing to 3400 ft AGL in the afternoon. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...5 percent. .TONIGHT... * Sky/weather...........Partly cloudy then becoming mostly cloudy. Slight chance of showers. * Min temperature.......50-60. * Maxhumidity..........85-100 percent. * 20-foot winds.........West winds around 4 mph in the evening becoming light. * Mixing height.........900-1900 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY... * Sky/weather...........Partly sunny. * Max temperature.......66-76. * Min humidity..........60-75 percent. * 20-foot winds.........Light winds becoming west around 3 mph in the afternoon. * Mixing height.........1200 ft AGL increasing to 4200 ft AGL in the afternoon. * Transport winds.......West around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY NIGHT...Mostly clear. Lows in the mid 50s. Northwest winds around 3 mph in the evening becoming light. .MONDAY...Warmer, sunny. Highs in the lower 80s. Northeast winds 3 to 6 mph. .MONDAY NIGHT...Mostly clear. Lows in the upper 50s. North winds around 3 mph in the evening becoming light. .TUESDAY...Mostly sunny. Highs in the mid 80s. Light winds becoming northwest around 3 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows in the mid 50s. West winds around 5 mph. .WEDNESDAY...Partly sunny. Slight chance of showers in the afternoon. Highs 68 to 78. Southwest winds around 5 mph. .THURSDAY...Mostly cloudy. Slight chance of showers. Lows in the lower 50s. Highs in the lower 70s. .FRIDAY...Partly cloudy. Lows around 50. Highs 69 to 79. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ656-222315- Northeast Puget Sound Lowlands Generally Below 1500 Feet- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Partly sunny. Chance of showers and slight chance of thunderstorms in the afternoon. * Max temperature.......62-72. * Min humidity..........64-79 percent. * 20-foot winds.........Southwest winds 3 to 5 mph. * Mixing height.........1100-2100 ft AGL. * Transport winds.......South 5 to 10 mph. * CWR (>0.25)...........20 percent. * Chance of Lightning...22 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers in the evening, then chance of showers after midnight. * Min temperature.......47-57. * Max humidity..........85-100 percent. * 20-foot winds.........Southwest winds 3 to 4 mph. * Mixing height.........500-1300 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...8 percent. .SUNDAY... * Sky/weather...........Partly sunny. Chance of showers in the morning. * Max temperature.......61-71. * Min humidity..........65-80 percent. * 20-foot winds.........South winds around 3 mph in the morning becoming light. * Mixing height.........1200-2200 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...5 percent. .SUNDAY NIGHT...Partly cloudy. Lows in the lower 50s. Light winds. .MONDAY...Warmer, sunny. Highs around 80. Light winds becoming northwest around 4 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows 52 to 62. Northwest winds around 3 mph in the evening becoming light. .TUESDAY...Sunny. Highs in the lower 80s. Light winds becoming west around 3 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows 52 to 62. Southwest winds around 3 mph. .WEDNESDAY...Partly sunny. Slight chance of showers in the morning, then chance of showers in the afternoon. Highs 68 to 78. South winds around 5 mph. .THURSDAY...Mostly cloudy. Chance of showers. Lows in the lower 50s. Highs 66 to 76. .FRIDAY...Partly cloudy. Lows in the lower 50s. Highs 67 to 77. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ657-222315- Southeast Puget Sound Lowlands Generally Below 1500 Feet- 355 AM PDT Sat Aug 22 2026 .TODAY... * Sky/weather...........Mostly cloudy then becoming mostly sunny. Slight chance of showers in the afternoon. * Max temperature.......67-77. * Min humidity..........56-71 percent. * 20-foot winds.........Light winds becoming southwest around 3 mph in the afternoon. * Mixing height.........1600-2600 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...12 percent. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers after midnight. * Min temperature.......51-61. * Max humidity..........85-100 percent. * 20-foot winds.........West winds around 3 mph in the evening becoming light. * Mixing height.........1200-2200 ft AGL. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY... * Sky/weather...........Partly sunny. Slight chance of showers in the morning. * Max temperature.......66-76. * Min humidity..........57-72 percent. * 20-foot winds.........Southwest winds 3 to 4 mph. * Mixing height.........1400 ft AGL increasing to 4100 ft AGL in the afternoon. * Transport winds.......Southwest around 5 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. .SUNDAY NIGHT...Mostly clear. Lows 50 to 60. North winds 3 to 4 mph. .MONDAY...Sunny. Highs in the lower 80s. Light winds becoming north around 4 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the upper 50s. North winds around 3 mph in the evening becoming light. .TUESDAY...Mostly sunny. Highs in the mid 80s. Light winds. .TUESDAY NIGHT...Partly cloudy. Lows 52 to 62. Light winds. .WEDNESDAY...Cooler. Partly sunny. Slight chance of showers in the afternoon. Highs in the mid 70s. Southwest winds around 4 mph. .THURSDAY...Mostly cloudy. Chance of showers. Lows 49 to 59. Highs in the lower 70s. .FRIDAY...Partly cloudy. Lows 48 to 58. Highs in the mid 70s. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ658-222315- West Slopes of the North Cascades Generally above 1500 Feet- 355 AM PDT Sat Aug 22 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING... .TODAY... * Sky/weather...........Partly sunny. Chance of showers in the morning, then showers likely and chance of thunderstorms in the afternoon. * Max temperature.......66-76...except 63-73 ridges. * Min humidity..........69-84 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 3 to 5 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........700-1700 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........25 percent. * Chance of Lightning...27 percent. * Freezing level........13500 Feet. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of thunderstorms in the evening. Chance of showers through the night. * Min temperature.......48-58...except 43-53 ridges. * Max humidity..........81-96 percent. * 20-foot winds......... * Valleys/lwr slopes..Downslope/downvalley around 3 mph. * Ridges/upr slopes...Southwest winds 3 to 7 mph. * Mixing height.........700-1200 ft AGL. * Transport winds.......Southwest around 10 mph. * CWR (>0.25)...........10 percent. * Chance of Lightning...15 percent. * Freezing level........11500 Feet. .SUNDAY... * Sky/weather...........Mostly cloudy. Chance of showers through the day. * Max temperature.......59-69...except 54-64 ridges. * Min humidity..........70-85 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 3 to 5 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........1100-2100 ft AGL. * Transport winds.......Southwest 5 to 10 mph. * CWR (>0.25)...........10 percent. * Chance of Lightning...7 percent. * Freezing level........10500 Feet. .SUNDAY NIGHT...Partly cloudy. Freezing level 13000 feet. Lows 47 to 57 valleys...in the upper 40s ridges. West winds around 4 mph shifting to the northeast after midnight. .MONDAY...Warmer, sunny. Freezing level 13000 feet. Highs 73 to 83 valleys...68 to 78 ridges. East winds around 5 mph shifting to the west around 4 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Freezing level 13500 feet. Lows 51 to 61. West winds around 3 mph shifting to the east around 5 mph after midnight. .TUESDAY...Sunny. Freezing level 13500 feet. Highs 75 to 85 valleys...70 to 80 ridges. East winds around 5 mph shifting to the west in the afternoon. .TUESDAY NIGHT...Partly cloudy. Freezing level 13500 feet. Lows 50 to 60. Southwest winds around 4 mph. .WEDNESDAY...Partly sunny. Slight chance of showers in the morning, then chance of showers in the afternoon. Freezing level 12500 feet. Highs 63 to 73 valleys...57 to 67 ridges. Southwest winds around 6 mph. .THURSDAY...Mostly cloudy. Chance of showers. Freezing level 10000 feet. Lows in the lower 50s valleys...in the mid 40s ridges. Highs 59 to 69 valleys...52 to 62 ridges. .FRIDAY...Partly cloudy. Freezing level 10000 feet. Lows in the upper 40s valleys...in the mid 40s ridges. Highs 63 to 73 valleys... 55 to 65 ridges. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ WAZ659-222315- West Slopes of the Central Cascades Generally above 1500 Feet- 355 AM PDT Sat Aug 22 2026 ...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 5 PM PDT THIS AFTERNOON... .TODAY... * Sky/weather...........Partly sunny. Chance of showers through the day. Slight chance of thunderstorms in the afternoon. * Max temperature.......67-77...except 58-68 ridges. * Min humidity..........63-78 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley 2 to 4 mph. * Ridges/upr slopes...Southwest winds 3 to 6 mph. * Mixing height.........1000-2000 ft AGL. * Transport winds.......West 5 to 10 mph. * CWR (>0.25)...........5 percent. * Chance of Lightning...13 percent. * Freezing level........13000 Feet. .TONIGHT... * Sky/weather...........Mostly cloudy. Slight chance of showers after midnight. * Min temperature.......49-59...except 41-51 ridges. * Max humidity..........78-93 percent...except 85-100 percent ridges. * 20-foot winds......... * Valleys/lwr slopes..Downslope/downvalley 3 to 5 mph. * Ridges/upr slopes...West winds 3 to 6 mph. * Mixing height.........900-1800 ft AGL. * Transport winds.......West around 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. * Freezing level........11500 Feet. .SUNDAY... * Sky/weather...........Partly sunny. Slight chance of showers in the morning. * Max temperature.......65-75...except 55-65 ridges. * Min humidity..........63-78 percent. * 20-foot winds......... * Valleys/lwr slopes..Upslope/upvalley around 3 mph. * Ridges/upr slopes...West winds 3 to 6 mph. * Mixing height.........1200 ft AGL increasing to 3200 ft AGL in the afternoon. * Transport winds.......West 5 to 10 mph. * CWR (>0.25)...........0 percent. * Chance of Lightning...3 percent. * Freezing level........11500 Feet. .SUNDAY NIGHT...Mostly clear. Freezing level 13500 feet. Lows 48 to 58 valleys...in the upper 40s ridges. Northwest winds around 4 mph shifting to the northeast around 3 mph after midnight. .MONDAY...Warmer, sunny. Freezing level 13500 feet. Highs 75 to 85 valleys...70 to 80 ridges. East winds around 5 mph shifting to the northwest around 3 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Freezing level 14000feet. Lows 52 to 62. Northwest winds around 3 mph shifting to the east around 5 mph after midnight. .TUESDAY...Sunny. Freezing level 13500 feet. Highs 77 to 87 valleys...70 to 80 ridges. East winds around 3 mph shifting to the west around 4 mph in the afternoon. .TUESDAY NIGHT...Partly cloudy. Freezing level 13500 feet. Lows 49 to 59. West winds around 3 mph. .WEDNESDAY...Mostly sunny. Slight chance of showers in the afternoon. Freezing level 12500 feet. Highs 64 to 74 valleys...57 to 67 ridges. West winds around 5 mph. .THURSDAY...Mostly cloudy. Chance of showers. Freezing level 10500 feet. Lows 47 to 57 valleys...in the mid 40s ridges. Highs 62 to 72 valleys...53 to 63 ridges. .FRIDAY...Partly cloudy. Freezing level 11500 feet. Lows 45 to 55 valleys...in the mid 40s ridges. Highs 64 to 74 valleys...56 to 66 ridges. .8 TO 14 Day Outlook Below normal temperatures and above normal precipitation. $$ www.weather.gov/seattle