A cold front from a surface low pressure system over Hudson Bay is expected to pass through the region on Friday, bringing a slight chance for isolated showers and/or light rain. West to southwesterly winds ahead of the front will cause near-average temperatures for the day. After the frontal passage, northwesterly winds will cool temperatures to the low-to-mid 50's overnight. With dew point temperatures similar to the air temperatures, there is a possibility of fog in the area Saturday morning; temperatures will rebound to the mid-to-upper 60's. High relative humidity values in the upper and lower levels will result in partly to mostly cloudy conditions through the day.
A surface high pressure system will build into the region on Saturday behind the front, then move off-shore on Sunday. As it leaves the area, a stationary front is expected to setup to the north of the track, causing surface winds to shift to the south to southeast. Westerly winds in the rest of the atmosphere will bring moisture over the region, with much of the air aloft fully saturated. As a result, precipitation chances are higher than in the initial forecast; model guidance suggests the highest chance for showers near or after mid-day.