This weekend because of low pressure and the western side of some zonal jet stream flow over the area will cause temperatures about 4 degrees below normal, partly cloudy to overcast skies, some scattered showers, and we can’t rule out some isolated thundershowers.
So, how much rain are we thinking? I would say probably something like 5-10 mm. Maybe more though. A lot of this is hit-or-miss showers, so it is possible we only get something like 3 mm, but also just as possible that someplace in the city gets 20. For the timing, I would say we’ll probably start with some showers or thundershowers in the afternoon/evening on Saturday, followed by some showers continuing into Sunday. Which should be over by Sunday evening.