OpenWeatherMap-Alerts-Weather-Driver

Anyone have a enough time in the saddle to know which OWM alerts to set to look for Snow? I have the outdoor HeatTrak heating mats on my deck to keep the path to the hot tub clear. However, HeatTrak says the mats will damage the composite decking boards if I leave the native thermostatic sensor to control the mats (turns mats on if outside temp is below 40...which basically means the entire winter in Minnesota). Thus I'd like to remove the thermostatic adapter and instead have the OWM driver trigger a state that turns on a smart switch when it sees there's snow in the near term forecast. I'll have to figure out a Turn Off method (any thoughts there too?). I've installed the OWM user driver with HPM and scrolled thru and realized I might need someone's experience to know which states correspond best to Snow and Snow that is near term or happening now ?.