METEOROLOGIST MARISA WOLOSZYN’S FORECAST DISCUSSION:
High pressure is still in control of our weather, keeping things dry for yet another day. Everywhere except the Willamette Valley saw another of sunshine with highs in the mid 40s.
A large temperature inversion is the culprit to keeping the fog in the valley. Cold air exists from the surface to around 900 ft, above this level is warm air. The warm air acts as a lid (because it is less dense than cold air) and keeps the cold air and fog trapped below.
High pressure remains in control for Sunday and Monday, keeping the forecast consistent. Everywhere but the valley will continue to see sunshine with highs in the low to mid 40s. The communities in the Willamette valley will keep the fog all day with highs in the low to mid 30s.
The next chance for rain will be Wednesday as a weak cold front swings through. In addition, the front will mix things up in the valley and get rid of the fog!
Have a super Sunday!
Meteorologist Marisa Woloszyn