The next weather disturbance that will bring us more rainfall is beginning to push onto the Southern British Columbia coast this morning. Mid and high-level clouds are already beginning to move into the area. This system is weaker than some of the weather systems we’ve recently seen so we will not see as much precipitation. Cloudy skies in our Wednesday forecast with a 70% chance of rain with afternoon high temperatures near 40 degrees.
A weak ridge of high pressure moves over us on Thursday with dry conditions during the day, increasing clouds and temperatures in the upper 30’s. Precipitation will move east as another weak weather system moves into Northcentral Washington Thursday night with a 50% chance of rain and overnight lows in the mid 30’s. This disturbance is fairly similar to today`s system where the main energy associated with it will move across Southern British Columbia.
For Friday, the region will still be under the influence of a shallow ridge of high pressure allowing the feed of moisture and warm air to bring widespread rain showers to the inland Northwest. The Wenatchee Valley can expect a 50% chance of rain with unseasonably warm temperatures near 50 degrees. This will also bring an increase in winds on Saturday for the Waterville Plateau, Wenatchee Valley and the Columbia Basin with southerly sustained winds in the upper teens and gusts into the upper 30 mph range. There is also a 60% chance of rain on Saturday with once again very warm temperatures into the lower 50’s.
Sunday through Tuesday of next week, a strong ridge of high pressure is expected to build off the coast and lead to a change in the upper level weather pattern from Southwesterly to Northwesterly. It will allow for colder and drier air to push into the region. Winds will decrease and temperatures will begin to drop to more reasonable winter temperatures. Highs will drop back into the 30s and upper 20s while overnight lows will decline into the 20s and upper teens.