Updated based on tonight’s NAM data just available.

Those reading my posts over the past few days know that this weekend’s weather will be be influenced by a closed upper low, a situation where the models have trouble in placement of precipitation and timing of areas of vorticity that rotate around the upper low causing instability showers to develop. As a result, this forecast is lower than average confidence.

For Saturday, the general trend has been for the main precipitation to end mid morning west of the city and later east into NJ.

Low clouds thin around noon and some sun through high clouds is likely in the afternoon. High 69-72. It will be windy.

Sunday will have a mix of clouds and sun. Instability in the mid afternoon may allow clouds to redevelop with light scattered showers possible, especially in western suburbs.  Highs 66-69. Light winds.