Friday, June 14, 2019: Over Minnesota today there is a deep/gusty southerly flow. A weak frontal boundary stretching across the state north of the I-94 corridor will bring some clouds and spotty showers to portions of northern and central Minnesota. Clouds have kept ozone in check and Green (good) in most areas, but a threshold Yellow (moderate) ozone is still possible this afternoon in the northern Twin Cities metro. Particle pollution is Green (good) throughout Minnesota. The front will sag southward toward the Iowa border on Saturday while a weak low pressure tracks into southern Minnesota. It will be mostly cloudy across most of the state, with more sun across the North Shore. There will be scattered showers and thunderstorms along and south of I-94, but keep in mind the day will be far from a rain out. Clouds will keep ozone Green (good). Particle pollution may pool a bit along the front, but despite this pooling particulate will be Green (good) statewide. The low pressure will track into Wisconsin on Sunday and the cold front will push south of our area. It will be cool behind the front with high temperatures well below normal. The air will be clean in the wake of the frontal passage and air quality will be Green (good). High pressure will build into the area during Monday and Tuesday. Both days are expected to be partly to mostly sunny with moderating temperatures. Ozone could reach the Yellow (moderate) threshold on Tuesday in the Twin Cities but otherwise will remain Green (good) across Minnesota. The next storm system will approach during the middle of next week and air quality will likely hover in the Green (good) category.