Watch Out For Weekend Showers & A Chilly Sunday

July 13, 2012

I’ve seen lots of fields with freshly mowed hay drying in the sun the last two days.  Get it taken care of today or tomorrow morning; or it may get wet!  

Showers are definitely possible this weekend, in fact anytime from Saturday evening through Monday morning in NW Oregon and SW Washington.  An upper level disturbance is sitting in Western Washington this morning and slides south right over Mt. Hood by Saturday afternoon.  The flow around that will cause thunderstorms to break out over the S. Washington and N. Oregon Cascades Saturday afternoon.  They MAY move to the west out over the Portland/Vancouver Metro Area.  Look at what happened last night over the western part of Puget Sound!

This could happen Saturday afternoon or night over us…so the risk of something getting wet is definitely there.

As that moves east Saturday night, strong onshore flow develops down near the surface. That means thick low clouds could take much of Sunday to dissipate; likely even some drizzle in the far eastern suburbs.

SUNDAY MAY BE THE COOLEST/CLOUDIEST DAY WE’VE SEEN IN THE PAST WEEK AND A HALF…maybe only 70-75 in the metro area.

A 2nd low dropping in Monday keeps temps below average Monday (75-80) then it’s back to more reasonable summer weather again.

Chief Meteorologist Mark Nelsen