FNUS76 KOTX 202307 FWSOTX Spot Forecast for Upper Wheeler...Washington DNR National Weather Service Spokane WA 407 PM PDT Mon Apr 20 2026 Forecast is based on ignition time of 1800 PDT on April 20. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION... A storm system moving into the region will bring increasing chances for showers and thunderstorms starting Tuesday morning and continuing into Wednesday afternoon. Any showers or storms Tuesday into Tuesday evening could produce gusty and erratic wind gusts. As rain chances taper off Wednesday afternoon, west to northwest winds will increase with potential for gusts 20-30 mph. The location of the unit may offer some sheltering and infrequent wind speeds compared to surrounding areas. There is a with a 50% chance of wetting rain. Between Tuesday and Wednesday between 0.15 and 0.35 inches of rain are possible with a 15% chance to receive more than 0.25". .TONIGHT... Sky/weather.........Partly cloudy. CWR.................0 percent. Chance of lightning.5 percent. Min temperature.....47. Max humidity........68-72 percent. Wind (20 ft)........West 4 to 8 mph becoming variable 1 to 3 mph. Mixing height.......Near surface. Transport winds.....South around 8 mph shifting to the northwest around 11 mph overnight. .TUESDAY... Sky/weather.........Partly sunny. 20% chance of rain showers before midday increasing 40% chance of rain showers and slight chance thunderstorms in the afternoon. CWR.................5 percent. Chance of lightning.15 percent. Max temperature.....60. Min humidity........43-48 percent. Wind (20 ft)........Variable winds 2 to 5 mph in the morning becoming West winds 6 to 10 mph. Gusts up to 20 mph in the afternoon. Gusty and erratic winds expected near thunderstorms through the day. Mixing height.......3800 ft AGL in the afternoon. Transport winds.....Southwest around 8 mph shifting to the west around 12 mph in the afternoon. .TUESDAY NIGHT... Sky/weather.........Mostly cloudy. Chance of rain and slight chance for thunderstorms. CWR.................45 percent. Chance of lightning.10 percent. Min temperature.....42. Max humidity........80-85 percent. Wind (20 ft)........West winds 6 to 9 mph with gusts 15 mph. Mixing height.......3000 ft AGL falling to 500 ft AGL. Transport winds.....Northwest 21 to 25 mph. .WEDNESDAY... Sky/weather.........Mostly cloudy. 70% chance in the morning decreasing to 30% in the afternoon. CWR.................35 percent mainly in the morning. Chance of lightning.5 percent. Max temperature.....50. Min humidity........60-65 percent. Wind (20 ft)........West to northwest winds 6 to 10 mph increasing 10 to 15 mph with gusts to around 30 mph. Mixing height.......1500 ft AGL increasing to 3000 ft AGL in the afternoon. Transport winds.....West 20 to 30 mph. $$ Forecaster...SB Requested by...Steven Reptsis Type of request...PRESCRIBED .TAG 2610591.3/OTX .DELDT 04/20/26 .FormatterVersion 2.0.0 .EMAIL steven.reptsis@dnr.wa.gov,Jeffrey.Dimke@dnr.wa.gov,nolan.brewer@dnr.wa.gov,nicholas.gale@dnr.wa.gov