Fri May 17 05:42:38 EDT 2024 Surprise Valley California-Eastern Lassen County- Northern Washoe County- 242 AM PDT Fri May 17 2024 .TODAY... * Sky/Weather........Sunny. * Max Temperature.... * Valleys..........72-82. * Mid Slope........66-76. * 24 hr trend......6 degrees cooler. * Min Humidity....... * Valleys..........10-18%. * Mid Slope........11-19%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Northwest winds 9 to 16 mph. Gusts to 25 mph in the afternoon. * Ridge Top........Northwest winds 10 to 20 mph with gusts to 30 mph. * Haines Index.......4. * LAL................1. * Chc Wetting Rain...0%. * Mixing Height......3800-4800 ft agl increasing to 6900-7900 ft agl in the afternoon. * Transport Winds....Northwest 15 to 25 mph. * Ventilation........Excellent. .TONIGHT... * Sky/Weather........Clear. * Min Temperature.... * Valleys..........36-46. * Mid Slope........39-49. * 24 hr trend......4 degrees cooler. * Max Humidity....... * Valleys..........35-45%. * Mid Slope........27-37%. * 24 hr trend......25% drier. * 20-Foot Winds...... * Valleys/Slope....North winds 9 to 17 mph with gusts to 25 mph becoming downslope 2 to 5 mph. * Ridge Top........North winds 10 to 20 mph. * Haines Index.......5. * LAL................1. * Chc Wetting Rain...0%. * Mixing Height......3900-4900 ft agl decreasing to 600-700 ft agl after midnight. * Transport Winds....North 10 to 15 mph. * Ventilation........Excellent decreasing to marginal after midnight. .SATURDAY... * Sky/Weather........Sunny. * Max Temperature.... * Valleys..........75-85. * Mid Slope........70-80. * Min Humidity....... * Valleys..........9-17%. * Mid Slope........10-16%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph becoming west 10 to 17 mph with gusts to 30 mph late in the afternoon. * Ridge Top........Southwest winds 15 to 25 mph. * Haines Index.......4-5. * LAL................1. * Chc Wetting Rain...0%. * Mixing Height......3300-4300 ft agl increasing to 8600-9600 ft agl in the afternoon. * Transport Winds....West 10 to 15 mph increasing to 20 to 30 mph in the afternoon. * Ventilation........Excellent. .Extended... .SATURDAY NIGHT...Clear. Lows 31-41. West winds 15 to 25 mph shifting to the northwest 9 to 14 mph after midnight. .SUNDAY...Clear. Highs 63-73. Lows 30-40. Northwest winds 10 to 15 mph. .MONDAY...Clear. Highs 61-71. Lows 30-40. North winds 10 to 15 mph. .TUESDAY...Clear. Highs 68-78. Lows 34-44. West winds 10 to 15 mph. .WEDNESDAY THROUGH THURSDAY...Mostly clear. Slight chance of showers. Highs 64-74. Lows 31-41.