Some areas of dense fog have developed overnight across parts of northwest Arkansas into far eastern and southeast Oklahoma. Patchy freezing fog will by possible early this morning, especially across northwest Arkansas. Increasing south winds by this afternoon will result in worsening fire weather conditions across northeast Oklahoma into northwest Arkansas. An increasing low-level jet could produce some showers and perhaps a few thunderstorms Sunday night. Severe weather is not expected. An active weather pattern is forecast for much of the coming week. Shower and thunderstorm chances will continue into Monday with the better chances coming Tuesday and Tuesday night as a cold front moves into the region. A few strong storms will be possible, but the main concern will be locally heavy rainfall especially across southeast Oklahoma into northwest Arkansas. Freezing temperatures are expected to build into the northern portion of the region late Tuesday night with temperatures expected to remain near or a bit above freezing across much of the area on Wednesday. Some light icing will be possible during this period generally north of a line from Fayetteville to McAlester. A warming trend will begin on Thursday and continue into next weekend, along with chances of additional rainfall.