Heavy rainfall will create a threat of flooding Wednesday or Thursday. A wet and windy pattern will develop over Western Washington starting Monday night and will continue through the upcoming weekend. At this time the greatest threat of heavy rainfall amounts that would be capable of producing minor river flooding will occur Wednesday through Thursday on the Olympic Peninsula. Snow levels during the event are expected to be quite high, over 7000 feet.
While it appears that a very heavy rainfall event will occur over or near the area midweek, forecast models are showing variability on the timing of the rain and the location of the flood-producing rainfall.
Fall leaves and locally heavy rainfall rates will give the threat of street flooding at times in urban areas late Tuesday night through Thursday morning. Water accumulation during the event can be alleviated by keeping storm drains clear of leaf litter, clutter and debris.
Local forecasts say 1 to 2 inches of rain are possible Wednesday and Wednesday night.