FNUS76 KSTO 181637 FWSSTO Spot Forecast for Gurnsey RX...USFS National Weather Service Sacramento CA 937 AM PDT Mon May 18 2026 Forecast is based on ignition time of 0900 PDT on May 19. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION... Many stations around the same elevation of the prescribed location continue to have gusty winds at this time. Expect these types of winds to continue today, but winds will decrease by this evening and these lower winds are expected again Tuessday and Wednesday. Relative humidities will be on the low side again today but will rise a bit Tuesday and Wednesday not as low as today, but still on the lower side in the teens. No preciptation is in the forecast at this time. .TUESDAY... Sky/weather.........Sunny. Max temperature.....69-73. Min humidity........13-17 percent. Wind (20 ft)........ Slope/valley.......East winds 5 to 10 with gusts to 20 mph. Ridgetop...........North 3 to 7 mph shifting to the northwest late in the afternoon. Mixing height.......9300 ft AGL. Transport winds.....Northeast 9 to 10 mph shifting to the northwest around 9 mph late in the afternoon. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CWR.............0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 Temp............50 59 63 66 68 69 70 71 71 RH..............27 21 18 17 16 16 15 15 15 SL/VL wind dir..E E E E E SE SE SE W SL/VL wind spd..3 3 3 3 3 5 5 5 5 SL/VL wind gust.9 9 9 9 9 10 10 10 10 Ridge wind dir..N N N N NW NW NW NW NW Ridge wind spd..5 5 3 3 3 3 5 7 8 Mix hgt (kft)...3.8 3.8 8.3 8.3 8.3 9.3 9.3 9.3 7.6 Transp wind dir.E E NE NE NE N N N NW Transp wind spd.10 10 9 9 9 10 10 10 9 .TUESDAY NIGHT... Sky/weather.........Mostly clear. Min temperature.....36-40. Max humidity........45-50 percent. Wind (20 ft)........ Slope/valley.......West winds up to 5 mph early in the evening becoming light. Ridgetop...........North 6 to 8 mph shifting to the west 6 to 10 mph overnight. Mixing height.......400 ft AGL. Transport winds.....Northwest 5 to 9 mph shifting to the northeast 7 to 8 mph late in the evening. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky cover.......CLR CLR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............71 68 64 59 54 49 46 44 43 41 40 40 RH..............15 20 28 34 38 42 45 46 47 48 48 48 SL/VL wind dir..W W W W W NE NE NE NE NE NE NE SL/VL wind spd..5 5 1 1 1 2 2 2 1 1 1 1 SL/VL wind gust.10 10 3 3 3 5 5 5 3 3 3 3 Ridge wind dir..NW N N N N N NW W W W W W Ridge wind spd..8 7 6 6 6 6 6 6 6 7 9 10 Mix hgt (kft)...7.6 7.6 0.6 0.6 0.6 0.5 0.5 0.5 0.4 0.4 0.4 0.5 Transp wind dir.NW NW NW NW NW NE NE NE NE NE NE NE Transp wind spd.9 9 5 5 5 8 8 8 7 7 7 7 .WEDNESDAY... Sky/weather.........Sunny. Max temperature.....75-79. Min humidity........16-20 percent. Wind (20 ft)........ Slope/valley.......Light winds becoming west 5 to 7 mph late in the afternoon. Ridgetop...........West 6 to 12 mph. Mixing height.......8900 ft AGL. Transport winds.....East around 7 mph shifting to the west 8 to 10 mph late in the morning. CWR.................0 percent. Chance of thunder...0 percent. TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR CLR CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............40 42 46 53 62 69 72 74 75 76 77 76 RH..............48 46 43 35 26 19 17 18 19 18 17 18 SL/VL wind dir..NE NE N N N SW SW SW W W W W SL/VL wind spd..1 1 0 0 0 3 3 3 7 7 7 7 SL/VL wind gust.3 3 3 3 3 8 8 8 12 12 12 14 Ridge wind dir..W W W W W W W W W W W W Ridge wind spd..12 12 12 10 8 7 6 6 6 6 6 6 Mix hgt (kft)...0.5 0.5 1.0 1.0 1.0 7.0 7.0 7.0 8.9 8.9 8.9 7.2 Transp wind dir.NE NE E E E SW SW SW W W W W Transp wind spd.7 7 7 7 7 8 8 8 10 10 10 10 $$ Forecaster...WR Requested by...Jacob McAuliffe Type of request...PRESCRIBED .TAG 2613930.0/STO .DELDT 05/18/26 .FormatterVersion 2.0.0 .EMAIL jacob.mcauliffe@usda.gov