FNUS76 KSTO 182251 FWSSTO Spot Forecast for FI-210...USFS National Weather Service Sacramento CA 351 PM PDT Mon May 18 2026 Forecast is based on ignition time of 0800 PDT on May 20. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION... Conditions will continue to be dry at the site, with Min RH values in the mid to upper teens Wednesday. Winds will be light Wednesday morning and turn toward the west for the slope/valley at 5-7mph by the afternoon. Areas near the ridgetop will see sustained winds throughout the day at 3-9mph out of the west. Little improvement in the overnight, with RH values in the mid to upper 30s. Sunny and dry Thursday, with Min RH in the 20s and light winds in the morning for the slope/valley. By Thursday afternoon winds turn toward the west at 5-7mph. Ridgetop winds will be out of the south at 5-9mph throughout the day. Continued dry and warm conditions end of the week and into the weekend. .WEDNESDAY... Sky/weather.........Sunny. Max temperature.....76-80. Min humidity........15-19 percent. Wind (20 ft)........ Slope/valley.......Light winds becoming west up to 6 mph late in the afternoon. Ridgetop...........West 3 to 9 mph. Mixing height.......7500 ft AGL. Transport winds.....East around 8 mph shifting to the southwest 5 to 8 mph late in the morning. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM Sky cover.......MCLEAR MCLEAR MCLEAR MCLEAR MCLEAR CWR.............0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 Temp............64 71 76 77 78 RH..............34 24 18 15 21 SL/VL wind......E 2 E 2 SW 3 W 6 W 6 SL/VL wind gust.5 5 8 14 14 Ridgetop wind...W 7 W 7 W 6 W 3 W 3 Mix hgt (ft)....400 400 7000 7500 7500 Transport wind..E 8 E 8 SW 5 W 8 W 8 .WEDNESDAY NIGHT... Sky/weather.........Mostly clear. Min temperature.....58-62. Max humidity........35-39 percent. Wind (20 ft)........ Slope/valley.......West winds up to 5 mph early in the evening becoming light. Ridgetop...........West around 3 mph shifting to the northwest late in the evening, then shifting to the east 5 to 6 mph late in the evening shifting to the southeast 6 to 7 mph overnight. Mixing height.......300 ft AGL. Transport winds.....Southwest 3 to 7 mph shifting to the northeast 7 to 10 mph late in the evening. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky cover.......MCLEAR MCLEAR MCLEAR CLEAR MCLEAR MCLEAR CWR.............0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 Temp............74 67 64 62 61 60 RH..............26 35 37 37 38 39 SL/VL wind......W 5 SW 1 SW 1 E 2 NE 3 NE 3 SL/VL wind gust.12 3 3 5 6 6 Ridgetop wind...W 3 W 3 NE 5 E 6 SE 7 S 7 Mix hgt (ft)....6000 400 400 300 400 400 Transport wind..W 7 S 3 S 3 E 7 NE 7 NE 7 .THURSDAY... Sky/weather.........Sunny. Max temperature.....79-83. Min humidity........20-25 percent. Wind (20 ft)........ Slope/valley.......Light winds becoming west up to 6 mph late in the afternoon. Ridgetop...........South 3 to 7 mph. Mixing height.......6800 ft AGL. Transport winds.....Northeast 7 to 10 mph shifting to the southwest 6 to 8 mph late in the morning. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 6 AM 9 AM NOON 3 PM Sky cover.......MCLEAR CLEAR MCLEAR MCLEAR CWR.............0 0 0 0 Chc of thdr (%).0 0 0 0 Temp............62 71 80 81 RH..............40 35 24 20 SL/VL wind......E 3G6 E 1G3 SW 3G8 W 6G14 Ridgetop wind...S 7 S 6 S 3 SW 3 Mix hgt (ft)....400 700 5800 6800 Transport wind..NE 9 E 7 SW 6 SW 8 .FORECAST DAYS 3 THROUGH 5... .FRIDAY... Mostly clear. Lows in the lower 60s. Highs in the lower 80s. Light winds. .SATURDAY... Clear. Lows around 60. Highs in the upper 70s. Light winds. .SUNDAY... Clear. Lows in the upper 50s. Highs in the upper 70s. Light winds. $$ Forecaster...JS Requested by...Kenny Remmert Type of request...PRESCRIBED .TAG 2613948.0/STO .DELDT 05/18/26 .FormatterVersion 2.0.0 .EMAIL kenneth.remmert@usda.gov