FNUS55 KREV 191157 FWFREV Fire Weather Planning Forecast National Weather Service Reno NV 457 AM PDT Tue May 19 2026 .DISCUSSION... A warming and drying trend will be in place this week with highs reaching back into 80s again by mid-week (70s Sierra valleys). Light northeast winds will prevail today before our typical afternoon westerly breezes return by Wednesday. Otherwise expect dry conditions through the week with only a low (<10% chance) of isolated showers by the weekend. Note: Thunderstorms imply gusty and erratic winds. Note: Mixing Heights are in feet above ground level of the valley floors. Note: Please see operating plan for detailed zone descriptions https://www.weather.gov/wrh/fire?wfo=rev NVZ420-200030- Northern Sierra Front including Carson City, Douglas, Storey, Southern Washoe, Western Lyon, and Far Southern Lassen Counties- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........64-74. * Mid Slope........60-70. * 24 hr trend......6 degrees warmer. * Min Humidity....... * Valleys..........4-14%. * Mid Slope........9-15%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph becoming east 7 to 12 mph in the afternoon. * Ridge Top........East winds 10 to 15 mph. Gusts to 20 mph in the morning. * Mixing Height......3100-4100 ft agl increasing to 7500-8500 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Very good. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........36-46. * Mid Slope........39-49. * 24 hr trend......6 degrees warmer. * Max Humidity....... * Valleys..........29-39%. * Mid Slope........20-30%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Northeast winds 10 to 15 mph shifting to the south after midnight. * Mixing Height......4200-5200 ft agl in the evening then 200-500 ft agl. * Transport Winds....Light winds. * Ventilation........Very good decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Sunny then becoming partly cloudy. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........70-80. * Mid Slope........67-77. * Min Humidity....... * Valleys..........7-17%. * Mid Slope........10-18%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southeast winds 10 to 15 mph until late afternoon becoming light. * Mixing Height......2500-3500 ft agl increasing to 7700-8700 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Fair increasing to excellent in the afternoon. .Extended... .WEDNESDAY NIGHT...Partly cloudy in the evening then clearing. Lows 40-50. Northwest winds 7 to 12 mph in the evening becoming downslope 2 to 5 mph. .THURSDAY...Clear. Highs 74-84. Lows 40-50. Northwest winds 10 to 15 mph. .FRIDAY THROUGH SATURDAY...Clear. Highs 76-86. Lows 43-53. West winds 10 to 15 mph. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 78-88. Lows 43-53. $$ NVZ421-200030- Southern Sierra Front including Alpine, Northern Mono, Southern Lyon, and Western Mineral Counties- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........60-70. * Mid Slope........54-64. * 24 hr trend......8 degrees warmer. * Min Humidity....... * Valleys..........8-18%. * Mid Slope........7-17%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph becoming northeast 9 to 14 mph in the afternoon. * Ridge Top........Northeast winds 10 to 15 mph. Gusts to 25 mph in the afternoon. * Mixing Height......2800-3800 ft agl increasing to 6700-7700 ft agl in the afternoon. * Transport Winds....Northeast 10 to 15 mph. * Ventilation........Good increasing to excellent in the afternoon. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........29-39. * Mid Slope........38-48. * 24 hr trend......7 degrees warmer. * Max Humidity....... * Valleys..........30-40%. * Mid Slope........20-30%. * 24 hr trend......6% drier. * 20-Foot Winds...... * Valleys/Slope....North winds 9 to 15 mph in the evening becoming downslope 2 to 5 mph. * Ridge Top........North winds 10 to 15 mph with gusts to 30 mph shifting to the east in the late evening and overnight. * Mixing Height......3900-4900 ft agl decreasing to 600 ft agl after midnight. * Transport Winds....North 10 to 15 mph in the evening becoming light. * Ventilation........Excellent decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........67-77. * Mid Slope........60-70. * Min Humidity....... * Valleys..........8-18%. * Mid Slope........8-18%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph becoming north 8 to 13 mph in the afternoon. * Ridge Top........North winds 10 to 15 mph. * Mixing Height......2600-3600 ft agl increasing to 8300-9300 ft agl in the afternoon. * Transport Winds....West 10 to 15 mph. * Ventilation........Fair increasing to very good in the afternoon. .Extended... .WEDNESDAY NIGHT...Partly cloudy in the evening then clearing. Lows 33-43. North winds 8 to 13 mph in the evening becoming downslope 2 to 5 mph. .THURSDAY...Clear. Highs 72-82. Lows 33-43. Northwest winds 10 to 15 mph. .FRIDAY THROUGH SATURDAY...Clear. Highs 73-83. Lows 36-46. Southwest winds 10 to 15 mph. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 75-85. Lows 37-47. $$ CAZ272-200030- Greater Lake Tahoe and Truckee Area- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........57-67. * Mid Slope........54-64. * 24 hr trend......7 degrees warmer. * Min Humidity....... * Valleys..........12-22%. * Mid Slope........12-22%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........East winds 10 to 20 mph. Gusts to 30 mph until late afternoon. * Mixing Height......2400-3400 ft agl increasing to 6400-7400 ft agl in the afternoon. * Transport Winds....East 10 to 15 mph. * Ventilation........Good increasing to very good in the afternoon. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........32-42. * Mid Slope........34-44. * 24 hr trend......5 degrees warmer. * Max Humidity....... * Valleys..........52-62%. * Mid Slope........27-37%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Northeast winds 10 to 15 mph. * Mixing Height......3900-4900 ft agl in the evening then 200-500 ft agl. * Transport Winds....Light winds. * Ventilation........Good decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........62-72. * Mid Slope........59-69. * Min Humidity....... * Valleys..........16-26%. * Mid Slope........16-26%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds. * Mixing Height......2400-3400 ft agl increasing to 6800-7800 ft agl in the afternoon. * Transport Winds....Southwest 10 to 15 mph. * Ventilation........Good increasing to very good in the afternoon. .Extended... .WEDNESDAY NIGHT...Partly cloudy in the evening then clearing. Lows 34-44. Downslope 2 to 5 mph. .THURSDAY...Clear. Highs 67-77. Lows 34-44. Slope winds. .FRIDAY THROUGH SATURDAY...Clear. Highs 67-77. Lows 36-46. Slope winds. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 68-78. Lows 36-46. $$ NVZ423-200030- West Humboldt Basin in Pershing County- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........67-75. * Mid Slope........62-72. * 24 hr trend......7 degrees warmer. * Min Humidity....... * Valleys..........9-14%. * Mid Slope........10-17%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds. * Mixing Height......3700-4700 ft agl increasing to 9200-10200 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Good increasing to very good in the afternoon. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........36-46. * Mid Slope........39-48. * 24 hr trend......7 degrees warmer. * Max Humidity....... * Valleys..........28-38%. * Mid Slope........21-31%. * 24 hr trend......8% drier. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Light winds. * Mixing Height......5000-6000 ft agl in the evening then 200-500 ft agl. * Transport Winds....Light winds. * Ventilation........Very good decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Partly cloudy. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........74-82. * Mid Slope........69-79. * Min Humidity....... * Valleys..........9-14%. * Mid Slope........10-16%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Southwest winds 10 to 15 mph. * Mixing Height......2900-3900 ft agl increasing to 9700-10700 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Good increasing to excellent in the afternoon. .Extended... .WEDNESDAY NIGHT...Partly cloudy. Lows 42-52. Downslope 2 to 5 mph. .THURSDAY...Clear. Highs 78-86. Lows 42-52. Slope winds. .FRIDAY THROUGH SATURDAY...Clear. Highs 81-91. Lows 46-56. West winds 10 to 15 mph. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 84-93. Lows 48-58. $$ NVZ429-200030- Lahontan Basin including Churchill and Eastern Mineral Counties- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........64-74. * Mid Slope........60-70. * 24 hr trend......6 degrees warmer. * Min Humidity....... * Valleys..........8-13%. * Mid Slope........8-13%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph becoming north 7 to 12 mph in the afternoon. * Ridge Top........North winds 10 to 15 mph. * Mixing Height......3400-4400 ft agl increasing to 8400-9400 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Good increasing to very good in the afternoon. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........34-44. * Mid Slope........39-49. * 24 hr trend......6 degrees warmer. * Max Humidity....... * Valleys..........25-35%. * Mid Slope........19-29%. * 24 hr trend......7% drier. * 20-Foot Winds...... * Valleys/Slope....North winds 8 to 13 mph in the evening becoming downslope 2 to 5 mph. * Ridge Top........North winds 10 to 15 mph shifting to the northeast in the late evening and overnight. Gusts to 25 mph in the evening. * Mixing Height......4500-5500 ft agl in the evening then 200-500 ft agl. * Transport Winds....North 10 to 15 mph in the evening becoming light. * Ventilation........Excellent decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Sunny then becoming partly cloudy. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........71-81. * Mid Slope........66-76. * Min Humidity....... * Valleys..........8-13%. * Mid Slope........9-14%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds becoming northwest 10 to 15 mph in the late morning and afternoon. * Mixing Height......2700-3700 ft agl increasing to 9100-10100 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Fair increasing to very good in the afternoon. .Extended... .WEDNESDAY NIGHT...Mostly cloudy in the evening then clearing. Lows 41-51. North winds 7 to 12 mph in the evening becoming downslope 2 to 5 mph. .THURSDAY...Clear. Highs 76-86. Lows 41-51. Northwest winds 10 to 15 mph. .FRIDAY...Partly cloudy. Highs 78-88. Lows 46-56. West winds 10 to 15 mph. .SATURDAY...Clear. Highs 80-90. Lows 47-57. West winds 10 to 15 mph. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 81-91. Lows 47-57. $$ CAZ270-278-NVZ458-200030- Surprise Valley California-Eastern Lassen County- Northern Washoe County- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........65-75. * Mid Slope........61-69. * 24 hr trend......7 degrees warmer. * Min Humidity....... * Valleys..........7-17%. * Mid Slope........12-20%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph becoming south 7 to 12 mph in the afternoon. * Ridge Top........Light winds. * Mixing Height......3100-4100 ft agl increasing to 8600-9600 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Good increasing to very good in the afternoon. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........34-44. * Mid Slope........36-46. * 24 hr trend......7 degrees warmer. * Max Humidity....... * Valleys..........45-55%. * Mid Slope........31-41%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....West winds 5 to 10 mph in the evening becoming downslope 2 to 5 mph. * Ridge Top........Northwest winds 10 to 15 mph. * Mixing Height......4700-5700 ft agl in the evening then 200-500 ft agl. * Transport Winds....Northwest 10 to 15 mph. * Ventilation........Excellent decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Partly cloudy. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........71-81. * Mid Slope........67-75. * Min Humidity....... * Valleys..........9-19%. * Mid Slope........13-23%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph becoming west 5 to 10 mph late in the afternoon. * Ridge Top........West winds 10 to 15 mph. * Mixing Height......2400-3400 ft agl increasing to 8900-9900 ft agl in the afternoon. * Transport Winds....West 10 to 15 mph. * Ventilation........Fair increasing to excellent in the afternoon. .Extended... .WEDNESDAY NIGHT...Partly cloudy. Lows 38-48. Northwest winds 8 to 13 mph. .THURSDAY...Clear. Highs 75-85. Lows 38-48. North winds 10 to 15 mph. .FRIDAY THROUGH SATURDAY...Clear. Highs 77-87. Lows 39-49. West winds 10 to 20 mph. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 78-88. Lows 39-49. $$ CAZ271-200030- Western Lassen, Eastern Plumas, and Eastern Sierra Counties- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........64-74. * Mid Slope........62-70. * 24 hr trend......7 degrees warmer. * Min Humidity....... * Valleys..........13-21%. * Mid Slope........12-22%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........East winds 10 to 15 mph. * Mixing Height......2800-3800 ft agl increasing to 7800-8800 ft agl in the afternoon. * Transport Winds....Light winds. * Ventilation........Very good. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........32-42. * Mid Slope........35-45. * 24 hr trend......6 degrees warmer. * Max Humidity....... * Valleys..........55-65%. * Mid Slope........33-43%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Downslope 2 to 5 mph. * Ridge Top........Light winds. * Mixing Height......4300-5300 ft agl in the evening then 200-500 ft agl. * Transport Winds....Light winds. * Ventilation........Very good decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........69-79. * Mid Slope........66-76. * Min Humidity....... * Valleys..........16-26%. * Mid Slope........15-25%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........South winds 10 to 15 mph until late afternoon becoming light. * Mixing Height......2600-3600 ft agl increasing to 9100-10100 ft agl in the afternoon. * Transport Winds....Southwest 10 to 15 mph. * Ventilation........Fair increasing to excellent in the afternoon. .Extended... .WEDNESDAY NIGHT...Clear. Lows 34-44. West winds 5 to 10 mph in the evening becoming downslope 2 to 5 mph. .THURSDAY...Clear. Highs 73-83. Lows 34-44. Northwest winds 10 to 15 mph. .FRIDAY THROUGH SATURDAY...Clear. Highs 73-83. Lows 36-46. Southwest winds 10 to 15 mph. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 73-83. Lows 36-46. $$ CAZ274-200030- Southern Mono County- 457 AM PDT Tue May 19 2026 .TODAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........57-67. * Mid Slope........53-63. * 24 hr trend......7 degrees warmer. * Min Humidity....... * Valleys..........8-18%. * Mid Slope........10-20%. * 24 hr trend......Little change. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. Gusts to 20 mph late in the afternoon. * Ridge Top........Light winds becoming north 10 to 15 mph in the afternoon. * Mixing Height......2800-3800 ft agl increasing to 6000-7000 ft agl in the afternoon. * Transport Winds....North 10 to 15 mph. * Ventilation........Good increasing to excellent in the afternoon. .TONIGHT... * Sky/Weather........Clear. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Min Temperature.... * Valleys..........28-38. * Mid Slope........28-38. * 24 hr trend......6 degrees warmer. * Max Humidity....... * Valleys..........33-43%. * Mid Slope........24-34%. * 24 hr trend......6% drier. * 20-Foot Winds...... * Valleys/Slope....North winds 7 to 12 mph with gusts to 20 mph in the evening becoming downslope 2 to 5 mph. * Ridge Top........North winds 10 to 15 mph. Gusts to 25 mph in the evening. * Mixing Height......4300-5300 ft agl decreasing to 600 ft agl after midnight. * Transport Winds....North 10 to 15 mph. * Ventilation........Excellent decreasing to poor after midnight. .WEDNESDAY... * Sky/Weather........Sunny. * Chance of Thunder..0%. * Chc Wetting Rain...0%. * Max Temperature.... * Valleys..........63-73. * Mid Slope........59-69. * Min Humidity....... * Valleys..........9-19%. * Mid Slope........10-20%. * 20-Foot Winds...... * Valleys/Slope....Upslope 4 to 8 mph. * Ridge Top........Light winds. * Mixing Height......2200-3200 ft agl increasing to 8200-9200 ft agl in the afternoon. * Transport Winds....Northwest 10 to 15 mph. * Ventilation........Fair increasing to very good in the afternoon. .Extended... .WEDNESDAY NIGHT...Partly cloudy in the evening then clearing. Lows 33-43. Downslope 2 to 5 mph. .THURSDAY...Clear. Highs 68-78. Lows 33-43. Slope winds. .FRIDAY...Partly cloudy. Highs 68-78. Lows 36-46. Slope winds. .SATURDAY...Clear. Highs 70-80. Lows 37-47. Slope winds. .SUNDAY THROUGH MEMORIAL DAY...Clear. Highs 72-82. Lows 38-48. $$ .8 to 14 day outlook for (Tue May 26 through Mon Jun 1) Above normal temperatures and near normal precipitation. = $$ http://weather.gov/reno