FNUS76 KSTO 200125 FWSSTO Spot Forecast for Irish Rx...USFS National Weather Service Sacramento CA 625 PM PDT Tue May 19 2026 Forecast is based on ignition time of 0600 PDT on May 20. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION... Mostly sunny, warm, and dry conditions are expected the next several days over the burn site. High pressure is forecast to build to our north, and low pressure to our south will help keep the region dry with generally light terrain driven surface winds. Daytime minimum humidities are expected to remain in the mid teens to low 20s on Wednesday and Thursday, with overnight recoveries forecast to be in the low to mid 40s. Wind gusts up to around 10-15 mph in the late afternoon/evening hours as after peak heating hours. .WEDNESDAY... Sky/weather.........Sunny then becoming partly sunny. Max temperature.....74-78. Min humidity........19-23 percent. Wind (20 ft)........ Slope/valley.......East winds up to 6 mph early in the morning becoming light, then becoming southwest up to 6 mph in the late morning and early afternoon shifting to the west up to 7 mph. Ridgetop...........North around 1-3 mph shifting to the southwest around 1-3 mph early in the morning, then shifting to the southeast in the late morning and afternoon. Mixing height.......6300 ft AGL. Transport winds.....East around 10 mph shifting to the southeast early in the morning, then shifting to the southwest 6 to 7 mph late in the morning shifting to the northwest around 7 mph late in the afternoon. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 6 AM 10 AM 2 PM Sky cover.......CLEAR MCLEAR MCLDY CWR.............0 0 0 Chc of thdr (%).0 0 0 Temp............55 71 75 RH..............27 21 25 SL/VL wind......E 6G13 SW 5G10 W 6G15 Ridgetop wind...N 1 S 1 SE 1 Mix hgt (ft)....400 2400 6300 Transport wind..E 10 SE 5 W 7 .WEDNESDAY NIGHT... Sky/weather.........Partly cloudy then becoming clear. Min temperature.....54-58. Max humidity........41-45 percent. Wind (20 ft)........ Slope/valley.......West winds up to 5 mph early in the evening becoming light, then becoming northeast up to 6 mph late in the evening. Ridgetop...........South 1 to 2 mph. Mixing height.......400 ft AGL. Transport winds.....Northwest around 7 mph shifting to the northeast 7 to 9 mph early in the evening, then shifting to the east around 10 mph early in the morning. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 6 PM 10 PM 2 AM Sky cover.......PCLDY CLEAR MCLEAR CWR.............0 0 0 Chc of thdr (%).0 0 0 Temp............74 61 58 RH..............24 39 43 SL/VL wind......W 5G14 N 3G9 NE 6G10 Ridgetop wind...S 1 S 1 S 1 Mix hgt (ft)....4000 400 400 Transport wind..NW 7 N 7 NE 9 .THURSDAY... Sky/weather.........Sunny. Max temperature.....78-82. Min humidity........22-26 percent. Wind (20 ft)........ Slope/valley.......East winds 5 to 6 mph early in the morning becoming light, then becoming west 5 to 7 mph late in the morning. Ridgetop...........South 2 to 3 mph. Mixing height.......6100 ft AGL. Transport winds.....East 6 to 10 mph shifting to the west 6 to 9 mph late in the morning. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 6 AM 10 AM 2 PM Sky cover.......MCLEAR CLEAR CLEAR CWR.............0 0 0 Chc of thdr (%).0 0 0 Temp............56 73 79 RH..............41 28 26 SL/VL wind......E 6G10 E 2G6 W 7G17 Ridgetop wind...S 2 S 2 S 2 Mix hgt (ft)....400 700 6100 Transport wind..E 10 E 6 W 9 .FORECAST DAYS 3 THROUGH 7... .FRIDAY... Clear. Lows in the upper 50s. Highs in the lower 80s. Northeast winds around 5 mph. .SATURDAY... Clear. Lows in the mid 50s. Highs in the upper 70s. Northeast winds around 5 mph. .SUNDAY... Clear. Lows in the mid 50s. Highs in the upper 70s. Light winds. .MEMORIAL DAY... Mostly clear. Lows in the mid 50s. Highs in the mid 70s. .TUESDAY... Mostly clear. Lows in the lower 50s. Highs in the lower 70s. $$ Forecaster...JW Requested by...Sylvester Ruiz Type of request...PRESCRIBED .TAG 2613983.1/STO .DELDT 05/20/26 .FormatterVersion 2.0.0 .EMAIL sylvester.ruiz@usda.gov