FNUS56 KOTX 191245 FWFOTX Fire Weather Planning Forecast for Eastern Washington and North Idaho National Weather Service Spokane WA 545 AM PDT Tue May 19 2026 .DISCUSSION... Temperatures trend warmer and drier through the week. Showers and isolated thunderstorms will increase across far northeast Washington and north Idaho early this afternoon into the early evening early evening. A backdoor front will bring shower chances to the Idaho Panhandle and a drier airmass to the region on Wednesday. Winds will be breezy from the southwest across eastern Washington and north Idaho this afternoon into the early evening. Winds in central Washington will be diurnally driven with breezy northwest northwest through the Cascade valleys in the later afternoon and evening. The front will also bring breezy north winds through the Okanogan Valley on Wednesday. *************************************************************** Forecasts for 20 foot wind speeds (valleys and ridge tops) are 10 minute averages reflecting RAWS wind. ***Ventilation Index is derived from transport wind multiplied by the mixing height divided by 100. Categories: low (< 200), moderate (200-500), high (500-800), and very high (> 800). *************************************************************** WAZ696-698-200145- East Washington Central Cascades (Zone 696)- East Washington North Cascades (Zone 698)- Including the cities of Stevens Pass, Lake Wenatchee Area, and Leavenworth 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....60-70 valleys and 48-58 mountains. * 24 hr Trend........Unchanged. * Min Humidity........35-50 percent valleys and 50-65 percent mountains. * 24 hr Trend........1 percent wetter valleys, and 15 percent wetter mountains. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 4 to 8 mph increasing to northwest 10 to 17 mph in the afternoon. Gusts up to 20 mph in the morning increasing to 30 mph in the afternoon. * Ridges/Upr Slopes....West 5 to 10 mph in the morning increasing to 12 to 18 mph in the afternoon. Gusts up to 25 mph in the morning increasing to 35 mph in the afternoon. * Mixing Height.......4500 ft AGL. * Transport Winds.....Northwest 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (551) in the morning increasing to high (782) in the afternoon. .TONIGHT... * Sky/Weather.........Mostly cloudy then becoming partly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....42-51 valleys and 34-44 mountains. * 24 hr Trend........2 degrees warmer. * Max Humidity........61-80 percent. * 24 hr Trend........5 percent wetter valleys, and 10 percent drier mountains. * Humidity Recovery...Good. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 10 to 19 mph. Gusts up to 40 mph in the evening decreasing to 25 mph overnight. * Ridges/Upr Slopes....Northwest 10 to 19 mph. Gusts up to 40 mph in the evening. * Mixing Height.......3500 ft AGL falling to near surface. * Transport Winds.....Northwest 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (690) in the evening decreasing to low (78) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....68-78 valleys and 55-65 mountains. * Min Humidity........24-35 percent valleys and 30-45 percent mountains. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 3 to 7 in the morning increasing to 8 to 12 mph in the afternoon with gusts to around 20 mph. * Ridges/Upr Slopes....Northwest 3 to 7 in the morning increasing to 9 to 13 mph in the afternoon with gusts toaround 25 mph. * Mixing Height.......8000 ft AGL. * Transport Winds.....North 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (695) in the morning increasing to very high (1203) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 44 to 53 valleys...37 to 47 mountains. Highs 70 to 80 valleys...57 to 67 mountains. West wind up to 10 mph. .FRIDAY...Mostly clear. Lows 46 to 55 valleys...39 to 49 mountains. Highs 71 to 81 valleys...59 to 69 mountains. West wind 5 to 15 mph. .SATURDAY...Partly cloudy. Lows 42 to 52. Highs 67 to 77 valleys...58 to 68 mountains. West wind 10 to 20 mph. .SUNDAY...Partly cloudy. Lows 40 to 50. Highs 64 to 74 valleys... 55 to 65 mountains. .MEMORIAL DAY...Partly cloudy. A chance of rain and high mountain snow showers. Lows 42 to 51 valleys...36 to 46 mountains. Highs 57 to 67 valleys...48 to 58 mountains. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ697-200145- East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697)- Including the city of Stehekin 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Partly sunny. * Chance of Lightning...0 percent. * Max Temperature.....57-67 valleys and 45-55 mountains. * 24 hr Trend........5 degrees warmer. * Min Humidity........55-70 percent. * 24 hr Trend........10 percent wetter valleys, and 20 percent wetter mountains. * 20-foot winds....... * Valleys/Lwr Slopes...West 4 to 7 mph in the morning increasing to 7 to 15 mph in the afternoon. * Ridges/Upr Slopes....West 5 to 8 in the morning increasing to west 9 to 16 mph in the afternoon. * Mixing Height.......3000 ft AGL. * Transport Winds.....West 10 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Moderate (379) in the morning increasing to moderate (483) in the afternoon. .TONIGHT... * Sky/Weather.........Mostly cloudy then becoming partly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....43-51 valleys and 34-44 mountains. * 24 hr Trend........5 degrees warmer. * Max Humidity........60-70 percent valleys and 65-80 percent mountains. * 24 hr Trend........Unchanged. * Humidity Recovery...Good. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 8 to 14 mph. * Ridges/Upr Slopes....Northwest 10 to 16 mph. Gusts up to 30 mph in the evening. * Mixing Height.......2500 ft AGL falling to near surface. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Moderate (403) in the evening decreasing to low (56) overnight. .WEDNESDAY... * Sky/Weather.........Sunny. * Chance of Lightning...0 percent. * Max Temperature.....66-76 valleys and 53-63 mountains. * Min Humidity........29-45 percent. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 3 to 11 mph. Gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....Northwest 3 to 12 mph. Gusts up to 20 mph in the afternoon. * Mixing Height.......7000 ft AGL. * Transport Winds.....North 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Moderate (460) in the morning increasing to very high (928) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 43 to 53 valleys...35 to 45 mountains. Highs 69 to 79 valleys...56 to 66 mountains. Northwest wind 5 to 15 mph. .FRIDAY...Mostly clear. Lows 46 to 55 valleys...38 to 48 mountains. Highs 70 to 80 valleys...57 to 67 mountains. West wind 5 to 15 mph. .SATURDAY...Partly cloudy. Lows 45 to 55 valleys...39 to 49 mountains. Highs 63 to 73 valleys...56 to 66 mountains. West wind 10 to 20 mph. .SUNDAY...Partly cloudy. A chance of rain and high mountain snow showers. Lows 43 to 53 valleys...37 to 47 mountains. Highs 59 to 69 valleys...53 to 63 mountains. .MEMORIAL DAY...Partly cloudy. A chance of rain and high mountain snow showers. Lows 41 to 51 valleys...35 to 45 mountains. Highs 51 to 61 valleys...46 to 56 mountains. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ704-200145- Methow Valley (Zone 704)- Including the cities of Mazama, Winthrop, and Twisp 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....64-73. * 24 hr Trend........2 degrees warmer. * Min Humidity........25-35 percent. * 24 hr Trend........3 percent wetter. * 20-foot winds.......Northwest 3 to 8 mph in the morning increasing to 8 to 13 mph in the late afternoon. Gusts up to 25 mph in the late afternoon. * Mixing Height.......6500 ft AGL. * Transport Winds.....Northwest 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (598) in the morning increasing to very high (922) in the afternoon. .TONIGHT... * Sky/Weather.........Partly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....41-51. * 24 hr Trend........3 degrees warmer. * Max Humidity........61-80 percent. * 24 hr Trend........10 percent drier. * Humidity Recovery...Good. * 20-foot winds.......Northwest 10 to 17 mph. Gusts up to 35 mph in the evening. * Mixing Height.......5000 ft AGL falling to near surface. * Transport Winds.....Northwest 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (771) in the evening decreasing to low (61) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....70-79. * Min Humidity........15-23 percent. * 20-foot winds.......Northwest 3 to 7 mph. * Mixing Height.......10000 ft AGL. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (547) in the morning increasing to very high (1170) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 44 to 54. Highs 72 to 81. Southwest wind up to 10 mph. .FRIDAY...Mostly clear. Lows 46 to 56. Highs 74 to 84. West wind up to 10 mph. .SATURDAY...Partly cloudy. Lows 47 to 57. Highs 71 to 81. West wind 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 45 to 55. Highs 69 to 77. .MEMORIAL DAY...Partly cloudy. Lows 43 to 53. Highs 62 to 71. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ703-200145- Okanogan Valley (Zone 703)- Including the cities of Conconully and Omak 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....66-76. * 24 hr Trend........1 degree warmer. * Min Humidity........27-35 percent. * 24 hr Trend........5 percent wetter. * 20-foot winds.......Northwest 3 to 10 mph. * Mixing Height.......7500 ft AGL. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (507) in the morning increasing to very high (875) in the afternoon. .TONIGHT... * Sky/Weather.........Partly cloudy then becoming mostly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....46-51. * 24 hr Trend........4 degrees warmer. * Max Humidity........55-65 percent. * 24 hr Trend........Unchanged. * Humidity Recovery...Fair. * 20-foot winds.......Northwest 6 to 17 mph. Gusts up to 35 mph in the evening. * Mixing Height.......6000 ft AGL falling to near surface. * Transport Winds.....Northwest 10 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Very high (807) in the evening decreasing to low (52) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....70-80. * Min Humidity........15-24 percent. * 20-foot winds.......North 7 to 15 mph with gusts to around 30 mph. * Mixing Height.......10000 ft AGL. * Transport Winds.....North 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Very high (873) in the morning increasing to very high (1533) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 48 to 54. Highs 72 to 82. Southwest wind up to 10 mph. .FRIDAY...Mostly clear. Lows 51 to 56. Highs 75 to 85. West wind up to 10 mph. .SATURDAY...Partly cloudy. Lows 52 to 57. Highs 75 to 84. West wind 10 to 20 mph. .SUNDAY...Partly cloudy. Lows 50 to 55. Highs 72 to 81. .MEMORIAL DAY...Partly cloudy. Lows near 50. Highs 66 to 75. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ702-200145- Colville Reservation (Zone 702)- Including the cities of Nespelem and Keller 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....64-74 valleys and 57-65 mountains. * 24 hr Trend........4 degrees warmer. * Min Humidity........26-40 percent. * 24 hr Trend........Unchanged valleys, and 5 percent wetter mountains. * 20-foot winds....... * Valleys/Lwr Slopes...West up to 8 mph. * Ridges/Upr Slopes....West up to 9 mph. * Mixing Height.......7500 ft AGL. * Transport Winds.....West 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Moderate (399) in the morning increasing to very high (895) in the afternoon. .TONIGHT... * Sky/Weather.........Mostly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....44-49. * 24 hr Trend........3 degrees warmer. * Max Humidity........60-70 percent. * 24 hr Trend........5 percent drier. * Humidity Recovery...Fair. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 3 to 8 mph. * Ridges/Upr Slopes....North 3 to 9 mph. * Mixing Height.......6500 ft AGL falling to near surface. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (739) in the evening decreasing to low (48) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....69-79 valleys and 61-70 mountains. * Min Humidity........18-27 percent. * 20-foot winds....... * Valleys/Lwr Slopes...North 3 to 10 mph. * Ridges/Upr Slopes....Northwest 3 to 10 mph with gusts to around 25 mph. * Mixing Height.......10500 ft AGL. * Transport Winds.....North 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Very high (932) in the morning increasing to very high (1579) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows in the mid to upper 40s. Highs 70 to 80 valleys...63 to 73 mountains. West wind up to 5 mph. .FRIDAY...Mostly clear. Lows 49 to 54. Highs 73 to 83 valleys... 66 to 75 mountains. South wind up to 10 mph. .SATURDAY...Partly cloudy. Lows in the lower to mid 50s. Highs 72 to 82 valleys...67 to 75 mountains. West wind 5 to 15 mph. .SUNDAY...Partly cloudy. Lows near 50. Highs 69 to 79 valleys... 64 to 72 mountains. .MEMORIAL DAY...Partly cloudy. Lows 47 to 52. Highs 64 to 73 valleys...58 to 66 mountains. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ699-200145- Okanogan Highlands and Kettle Mountains (Zone 699)- Including the cities of Republic and Curlew 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. A chance of rain showers in the late morning and afternoon. A chance of thunderstorms in the afternoon. * Chance of Lightning...20 percent. * Max Temperature.....63-73 valleys and 56-64 mountains. * 24 hr Trend........3 degrees warmer. * Min Humidity........30-45 percent. * 24 hr Trend........5 percent drier valleys, and 10 percent wetter mountains. * 20-foot winds....... * Valleys/Lwr Slopes...West up to 7 mph. * Ridges/Upr Slopes....West up to 8 mph. Gusts up to 20 mph in the afternoon. * Mixing Height.......6000 ft AGL. * Transport Winds.....West 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Moderate (427) in the morning increasing to high (788) in the afternoon. .TONIGHT... * Sky/Weather.........Mostly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....41-49. * 24 hr Trend........2 degrees warmer. * Max Humidity........61-80 percent. * 24 hr Trend........10 percent drier valleys, and unchanged mountains. * Humidity Recovery...Good. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 3 to 7 mph. * Ridges/Upr Slopes....Northwest 3 to 7 mph. Gusts up to 20 mph in the evening. * Mixing Height.......5000 ft AGL falling to near surface. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (690) in the evening decreasing to low (46) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....67-77 valleys and 60-69 mountains. * Min Humidity........17-27 percent. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest 5 to 10 mph with gusts to around 25 mph. * Ridges/Upr Slopes....Northwest 6 to 11 mph. Gusts up to 20 mph in the morning increasing to 30 mph in the afternoon. * Mixing Height.......10500 ft AGL. * Transport Winds.....North 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Very high (980) in the morning increasing to very high (1774) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 41 to 49. Highs 70 to 80 valleys...63 to 72 mountains. Northwest wind up to 5 mph. .FRIDAY THROUGH SATURDAY...Partly cloudy. Lows 46 to 54. Highs 72 to 82 valleys...65 to 75 mountains. Southwest wind up to 10 mph. .SUNDAY...Partly cloudy. Lows 46 to 53. Highs 69 to 78 valleys... 63 to 72 mountains. .MEMORIAL DAY...Partly cloudy. Lows 44 to 51. Highs 64 to 73 valleys...57 to 67 mountains. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ700-701-200145- Selkirk Mountains of Northeast Washington (Zone 700)- Foothills of Northeast Washington (Zone 701)- Including the cities of Metaline Falls, Ione, Colville, Deer Park, and Newport 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. A chance of showers and thunderstorms in the afternoon. * Chance of Lightning...10 percent. * Max Temperature.....64-72 valleys and 54-64 mountains. * 24 hr Trend........9 degrees warmer. * Min Humidity........30-45 percent valleys and 40-55 percent mountains. * 24 hr Trend........10 percent drier valleys, and 5 percent drier mountains. * 20-foot winds....... * Valleys/Lwr Slopes...Southwest up to 9 mph. Gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....Southwest up to 10 mph. Gusts up to 20 mph in the afternoon. * Mixing Height.......7000 ft AGL. * Transport Winds.....Southwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Moderate (479) in the morning increasing to very high (942) in the afternoon. .TONIGHT... * Sky/Weather.........Partly cloudy then becoming mostly cloudy. A chance of rain showers in the evening. * Chance of Lightning...0 percent. * Min Temperature.....39-48. * 24 hr Trend........4 degrees warmer. * Max Humidity........70-80 percent. * 24 hr Trend........20 percent drier valleys, and unchanged mountains. * Humidity Recovery...Good. * 20-foot winds....... * Valleys/Lwr Slopes...West up to 7 mph in the evening shifting to the north up to 3 mph overnight. * Ridges/Upr Slopes....Northwest 3 to 10 mph. * Mixing Height.......5000 ft AGL falling to near surface. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (729) in the evening decreasing to low (32) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....68-76 valleys and 58-68 mountains. * Min Humidity........20-30 percent valleys and 25-40 percent mountains. * 20-foot winds....... * Valleys/Lwr Slopes...Northwest up to 8 mph. Gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....Northwest up to 10 mph. Gusts up to 25 mph in the afternoon. * Mixing Height.......10000 ft AGL. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (695) in the morning increasing to very high (1394) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 39 to 48. Highs 70 to 78 valleys...60 to 70 mountains. Northwest wind up to 5 mph. .FRIDAY...Mostly clear. Lows 43 to 52. Highs 72 to 81 valleys... 63 to 73 mountains. South wind up to 5 mph. .SATURDAY...Partly cloudy. Lows 46 to 54. Highs 72 to 80 valleys...64 to 74 mountains. South wind up to 10 mph. .SUNDAY...Partly cloudy. Lows 44 to 52. Highs 70 to 78 valleys... 62 to 72 mountains. .MEMORIAL DAY...Mostly cloudy. Lows 44 to 51. Highs 65 to 72 valleys...56 to 66 mountains. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ IDZ101-200145- Northern and Central Idaho Panhandle (Zone 101)- Including the cities of St. Maries, Rathdrum Prairie, Silver Valley, Bonners Ferry, and Priest Lake 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. A chance of showers and thunderstorms in the afternoon. * Chance of Lightning...10 percent. * Max Temperature.....61-68 valleys and 51-61 mountains. * 24 hr Trend........4 degrees warmer. * Min Humidity........35-50 percent valleys and 45-60 percent mountains. * 24 hr Trend........5 percent drier valleys, and unchanged mountains. * 20-foot winds....... * Valleys/Lwr Slopes...Southwest 4 to 12 mph with gusts to around 20 mph. * Ridges/Upr Slopes....Southwest 6 to 14 mph with gusts to around 25 mph. * Mixing Height.......6000 ft AGL. * Transport Winds.....Southwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (714) in the morning increasing to very high (898) in the afternoon. .TONIGHT... * Sky/Weather.........Mostly cloudy. A chance of rain showers in the evening. * Chance of Lightning...0 percent. * Min Temperature.....39-48. * 24 hr Trend........4 degrees warmer. * Max Humidity........75-90 percent valleys and 65-80 percent mountains. * 24 hr Trend........10 percent drier valleys, and unchanged mountains. * Humidity Recovery...Good. * 20-foot winds....... * Valleys/Lwr Slopes...Southwest 3 to 12 mph. Gusts up to 20 mph in the evening. * Ridges/Upr Slopes....Southwest 3 to 12 mph. Gusts up to 25 mph in the evening. * Mixing Height.......4000 ft AGL falling to near surface. * Transport Winds.....West 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (617) in the evening decreasing to low (43) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. A chance of rain showers in the afternoon. * Chance of Lightning...0 percent. * Max Temperature.....64-70 valleys and 53-63 mountains. * Min Humidity........30-45 percent valleys and 40-55 percent mountains. * 20-foot winds....... * Valleys/Lwr Slopes...West up to 9 mph. Gusts up to 20 mph in the afternoon. * Ridges/Upr Slopes....West up to 10 mph. * Mixing Height.......8000 ft AGL. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (759) in the morning increasing to very high (1049) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 38 to 46. Highs 67 to 73 valleys...57 to 67 mountains. North wind up to 5 mph. .FRIDAY...Mostly clear. Lows 42 to 50. Highs 70 to 77 valleys... 60 to 70 mountains. Southwest wind up to 10 mph. .SATURDAY...Partly cloudy. Lows 44 to 52. Highs 70 to 77 valleys...62 to 72 mountains. South wind 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 44 to 51. Highs 68 to 75 valleys... 60 to 70 mountains. .MEMORIAL DAY...Mostly cloudy. A chance of rain showers. Lows 44 to 51. Highs 62 to 69 valleys...54 to 64 mountains. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ705-706-200145- Foothills of Central Washington Cascades (Zone 705)- Waterville Plateau (Zone 706)- Including the cities of Chelan, Wenatchee, Waterville, and Grand Coulee 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....66-75. * 24 hr Trend........3 degrees warmer. * Min Humidity........27-35 percent. * 24 hr Trend........Unchanged. * 20-foot winds.......West 6 to 12 mph in the morning increasing to 12 to 17 mph in the afternoon. Gusts up to 30 mph in the afternoon. * Mixing Height.......7500 ft AGL. * Transport Winds.....West 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (619) in the morning increasing to very high (928) in the afternoon. .TONIGHT... * Sky/Weather.........Partly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....45-51. * 24 hr Trend........4 degrees warmer. * Max Humidity........55-70 percent. * 24 hr Trend........Unchanged. * Humidity Recovery...Fair. * 20-foot winds.......Northwest 12 to 20 mph in the evening. Gusts up to 35 mph in the evening decreasing to 25 mph overnight. * Mixing Height.......6500 ft AGL falling to near surface. * Transport Winds.....Northwest 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Very high (831) in the evening decreasing to low (69) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....71-81. * Min Humidity........16-26 percent. * 20-foot winds.......Northwest 3 to 10 mph. * Mixing Height.......9500 ft AGL. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (721) in the morning increasing to very high (1444) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 48 to 54. Highs 73 to 83. West wind up to 10 mph. .FRIDAY...Mostly clear. Lows 50 to 56. Highs 76 to 86. West wind 5 to 15 mph. .SATURDAY...Partly cloudy. Lows 51 to 56. Highs 75 to 83. West wind 10 to 20 mph. .SUNDAY...Partly cloudy. Lows 50 to 55. Highs 72 to 80. .MEMORIAL DAY...Partly cloudy. Lows 47 to 53. Highs 65 to 73. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperaturesand below normal precipitation. $$ WAZ707-708-200145- Western Columbia Basin (Zone 707)-Eastern Columbia Basin - Palouse - Spokane Area (Zone 708)- Including the cities of Moses Lake, Ephrata, Spokane, Pullman, Ritzville, Wilbur, and Cheney 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....67-76. * 24 hr Trend........8 degrees warmer. * Min Humidity........27-40 percent. * 24 hr Trend........Unchanged. * 20-foot winds.......Southwest 3 to 11 mph. Gusts up to 25 mph in the afternoon. * Mixing Height.......8000 ft AGL. * Transport Winds.....West 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (785) in the morning increasing to very high (1061) in the afternoon. .TONIGHT... * Sky/Weather.........Partly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....44-50. * 24 hr Trend........4 degrees warmer. * Max Humidity........65-80 percent. * 24 hr Trend........Unchanged. * Humidity Recovery...Good. * 20-foot winds.......West 7 to 15 mph. Gusts up to 30 mph in the evening. * Mixing Height.......7000 ft AGL falling to near surface. * Transport Winds.....West 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...Very high (903) in the evening decreasing to low (57) overnight. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....71-79. * Min Humidity........19-29 percent. * 20-foot winds.......West 3 to 8 mph. * Mixing Height.......9500 ft AGL. * Transport Winds.....Northwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (590) in the morning increasing to very high (1276) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Partly cloudy. Lows 44 to 52. Highs 72 to 82. Northeast wind up to 10 mph. .FRIDAY...Mostly clear. Lows 47 to 55. Highs 76 to 85. South wind up to 10 mph. .SATURDAY...Partly cloudy. Lows 50 to 55. Highs 77 to 85. Southwest wind 5 to 15 mph. .SUNDAY...Partly cloudy. Lows 49 to 54. Highs 74 to 82. .MEMORIAL DAY...Partly cloudy. Lows near 50. Highs 68 to 75. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$ WAZ709-200145- Lower Palouse - Snake River (Zone 709)- Including the city of Pomeroy 545 AM PDT Tue May 19 2026 .Today... * Sky/Weather.........Mostly sunny. * Chance of Lightning...0 percent. * Max Temperature.....65-75. * 24 hr Trend........2 degrees warmer. * Min Humidity........30-45 percent. * 24 hr Trend........Unchanged. * 20-foot winds.......Southwest 3 to 13 mph with gusts to around 25 mph. * Mixing Height.......6500 ft AGL. * Transport Winds.....West 10 to 20 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (793) in the morning increasing to very high (977) in the afternoon. .TONIGHT... * Sky/Weather.........Partly cloudy then becoming mostly cloudy. * Chance of Lightning...0 percent. * Min Temperature.....46-50. * 24 hr Trend........5 degrees warmer. * Max Humidity........60-75 percent. * 24 hr Trend........Unchanged. * Humidity Recovery...Fair. * 20-foot winds.......Southwest 3 to 10 mph. * Mixing Height.......5500 ft AGL falling to near surface. * Transport Winds.....Southwest 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (753) in the evening decreasing to low (55) overnight. .WEDNESDAY... * Sky/Weather.........Partly sunny. * Chance of Lightning...0 percent. * Max Temperature.....68-78. * Min Humidity........29-40 percent. * 20-foot winds.......West 3 to 11 mph. * Mixing Height.......7000 ft AGL. * Transport Winds.....West 5 to 15 mph. * CWR (> 0.10 IN).....0 percent. * Ventilation Index...High (513) in the morning increasing to very high (825) in the afternoon. .Forecast Days 3 Through 7...... .THURSDAY...Mostly clear. Lows in the mid to upper 40s. Highs 70 to 80. East wind up to 10 mph. .FRIDAY THROUGH SATURDAY...Mostly clear. Lows 48 to 55. Highs 75 to 85. Southwest wind 4 to 15 mph. .SUNDAY...Partly cloudy. Lows in the lower to mid 50s. Highs 74 to 83. .MEMORIAL DAY...Partly cloudy. Lows in the lower 50s. Highs 67 to 75. .8 to 14 Day Outlook for May 26 - Jun 01, 2026 Above normal temperatures and below normal precipitation. $$