FNUS76 KOTX 050105 FWSOTX Spot Forecast for North Siwash RX...IDCDC National Weather Service Spokane WA 605 PM PDT Mon May 4 2026 Forecast is based on ignition time of 1800 PDT on May 04. If conditions become unrepresentative, contact the National Weather Service. *************************************************************** Forecasts for 20 foot wind speeds (valleys and ridge tops) are 10 minute averages reflecting RAWS wind. ***Ventilation Index is derived from transport wind multiplied by the mixing height divided by 100. Categories: low (< 200), moderate (200-500), high (500-800), and very high (> 800). *************************************************************** .DISCUSSION... Mild and dry conditions will continue for the burn area for the foreseeable future. RH recovery will be fair tonight. A dry cold front will pass over the project around 2100-2300 bringing gusty northeast winds. This will bring lower dewpoints in the mid to low 20s into the area. RHs Tuesday will be lower despite cooler temperatures. RHs Wednesday rebound a few percent higher but temperatures warm several degrees. .TONIGHT... Sky/weather.........Mostly clear. CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....39. Max humidity........60-65 percent. Wind (20 ft)........Northeast winds 8-14 mph with gusts up to 25 mph. Mixing height.......Near surface. Transport winds.....East 12 to 23 mph. Ventilation Index...Low (30). .TUESDAY... Sky/weather.........Sunny. CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....56. Min humidity........25-30 percent. Wind (20 ft)........Northeast winds 8-14 mph decreasing to 6-10 mph around 1800 hours. Mixing height.......4500 ft AGL. Transport winds.....Northeast 13 to 17 mph. Ventilation Index...Low (80) increasing to high to very high (752-805) in the afternoon. .TUESDAY NIGHT... Sky/weather.........Mostly clear. CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....40. Max humidity........40-45 percent. Wind (20 ft)........Southeast winds 4-8 mph. Mixing height.......Near surface. Transport winds.....East 6 to 8 mph. Ventilation Index...Low (13). .WEDNESDAY... Sky/weather.........Sunny. CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....63. Min humidity........29-34 percent. Wind (20 ft)........Southwest winds 5-9 mph. Gusts up to 15 mph in the afternoon. Mixing height.......3500 ft AGL. Transport winds.....Southwest around 9 mph increasing to west around 19 mph in the afternoon. Ventilation Index...Low (2) increasing to high to very high (719-1042) in the afternoon. $$ Forecaster...DB Requested by...Emily Freeze Type of request...PRESCRIBED .TAG 2612709.0/OTX .DELDT 05/04/26 .FormatterVersion 2.0.0 .EMAIL idcdc@firenet.gov