The heavy rainfall in recent weeks has increased soil moisture to high levels across Western Washington with notable events including last Tuesday`s heavy rain and a second period of heavy rainfall Wednesday night through Thanksgiving Day. Another wet and warm weather system is expected to reach the area tonight, but will probably not soak the area as much as the previous two systems. However, this should maintain the heightened threat of landslides through this weekend and could act to trigger a landslide or two.
The National Weather Service has issued a flood watch for the Skokomish River as heavy rain is expected. The flood watch is in effect from Wednesday afternoon through Thursday morning. Forecasters say 5 to 8 inches of rain over the Olympic Mountains could cause the Skokomish to flood. The River is expected to rise to near flood stage (17 feet) about 11 AM Thursday.
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.
An Air Quality Alert has been issued by the National Weather Service. It is in effect from 6 PM this evening to midnight PDT Tuesday night.
Smoke from wildfires in Eastern Washington and Montana will drift westward across Western Washington through Tuesday night. The central Puget Sound Region and the mountains will be the most impacted by the smoke. Expect the air quality to become unhealthy for sensitive groups late tonight through Tuesday evening.
The National Weather Service has issued a Heat Advisory, which is in effect from noon today (Monday) to 10 PM Tuesday. The advisory specifically names Shelton as one of the locations affected.
The National Weather Service says building high pressure over the region will allow dry and very warm conditions to develop over Western Washington beginning Friday and extending through early next week, including the Labor Day holiday.
High temperatures over Western Washington will rise into the mid 70s to mid 80s today, then reach the 80s to lower 90s this weekend. Increasing offshore flow will push highs into the lower 80s to mid 90s on Labor Day, peaking in the mid 80s to upper 90s on Tuesday. The warmest locations will be around the Greater Puget Sound region and the Southwest interior.
The Excessive Heat Warning continues through Friday. A Red Flag Warning is in effect today (Thursday). And poor air quality will continue through Friday.
The Excessive Heat Warning is effective until 9 PM Friday as unusually hot weather continues. Forecasters say widespread record highs are expected again today. Highs today will be warmer than Wednesday around 100. Friday will be slightly cooler, but highs will still be in the upper 80s to mid 90s.
The National Weather Service has issued a Fire Weather Watch along with the Excessive Heat Warning. The Fire Weather Watch is in effect from Wednesday afternoon through Thursday evening. Wednesday highs will rise to the mid and upper 90s, and on Thursday range from 96 to 104. Relative humidity Wednesday afternoon are expected to drop into the lower to mid 20 percent range, and on Thursday afternoon range from the upper teens to mid 20s. These conditions are favorable for rapid spread on any new or existing fires. And again outdoor burning has been banned in Mason County and authorities ask residents to be extremely cautious with any spark, flame or burning material.
Mason County PUD 3 urges customers to conserve electricity to keep comfortable while avoiding increased energy costs during this week’s hot temperatures. Tuesday’s temperatures could reach the low 90’s, with Wednesday’s high in the mid to upper 90’s. Thursday’s high is forecast for 101 degrees, possibly higher (106 has been mentioned) and probably be within 5 degrees of the all-time record high. Friday will be a bit cooler, but highs will still be in the upper 80s and 90s.
Here are some energy conservation tips:
The National Weather Service has issued an Excessive Heat Warning, which is in effect from 2 PM Tuesday to 9 PM PDT Friday. Forecasters say unusually hot weather is forecast to begin Tuesday and continue through Friday, with widespread record highs on Wednesday and Thursday. Thursday should be the hottest day in this stretch for most spots, and high temperatures will probably be within 5 degrees of the all-time record high.