FNUS75 KBOI 251024 FWSBOI Spot Forecast for Shirts piles Rx...Boise NF National Weather Service Boise ID 424 AM MDT Sat Oct 25 2025 Forecast is based on ignition time of 0900 MDT on October 25. If conditions become unrepresentative...contact the National Weather Service. Please contact our office at (208)334-9060, if you have questions or concerns with this forecast. ...RAIN TODAY. HEAVY SHOWERS AND A THUNDERSTORM POSSIBLE THIS EVENING. COLDER SUNDAY WITH RAIN/SNOW SHOWERS SUNDAY AFTERNOON/EVENING. VALLEY FOG MONDAY MORNING... .DISCUSSION... Two cold fronts: First one this morning with widespread moderate to heavy rain through 2 PM MDT, then partial clearing. Second stronger cold front 7 to 9 PM MDT this evening with brief heavy rain, gusty southwest wind, and a 30 percent chance of a thunderstorm. Partial clearing overnight. Colder Sunday with rain and snow showers in the afternoon and evening. Valley fog Monday morning, then mostly sunny and cold. .REST OF TODAY... Sky/weather.........Moderate to locally heavy rain through about 2 PM MDT. Rainfall near .50 inch. Chance of precipitation 100 percent. Max temperature.....44 to 49. Min humidity........73 to 78 percent. CWR.................90 percent. Wind - 20 foot......South 6 to 11 mph with gusts to around 20 mph. Mixing height.......3000 ft AGL. Transport winds.....South around 25 mph. Ventilation Index...750 excellent. .TONIGHT... Sky/weather.........A 90 percent chance of rain showers and 30 percent chance of a thunderstorm during passage of a cold between 7 PM to 9 PM MDT. A 30 percent chance of rain and snow showers overnight. Rainfall near .15 inch. No snow accumulation expected. Min temperature.....30 to 35. Max humidity........95 to 100 percent. CWR.................60 percent. Wind - 20 foot......Southwest 5 to 11 mph. Gusts up to 22 mph in the evening decreasing to 14 mph overnight. Gusty and erratic winds expected near thunderstorms in the evening. Mixing height.......500 ft AGL. Transport winds.....Southwest around 10 mph. Ventilation Index...50 poor. .SUNDAY... Sky/weather.........Mostly cloudy. A chance of rain and snow showers in the morning, then rain and snow showers likely in the afternoon. Chance of precipitation 70 percent. Snow accumulation up to 1 inch. Max temperature.....36 to 43. Min humidity........61 to 66 percent. CWR.................40 percent. Wind - 20 foot......Southwest 3 to 6 mph. Mixing height.......4000 ft AGL. Transport winds.....Southwest around 10 mph. Ventilation Index...400 fair. $$ Forecaster...Colin Requested by...Chris Hightower Type of request...PRESCRIBED .TAG 2523836.3/BOI .DELDT 10/25/25 .FormatterVersion 2.0.0 .EMAIL christopher.hightower@usda.gov,justin.yankey@usda.gov,William.Sanders2@usda.gov