Stagnant Weather Continues

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Melissa-Frey-500x500-250x250 Meteorologist Melissa Frey’s Forecast Discussion:

We’re going on 12 days with no rain and we’ll likely add another 7 dry days this week.

The ridge of high pressure that has more or less been with us for a week and a half will stay put for most of this week as well. This means clear skies, dry weather and warm temperatures across the Pacific Northwest while the southern Willamette Valley is stuck under dense fog with chilly temperatures. Highs Monday will be in the upper 30s in the valley, mid 50s along the coast, mid 40s in the Cascades and low 50s in Central Oregon.

The Willamette Valley and Umpqua Basin is under a Dense Fog Advisory until 10 a.m. for low visibilities due to the fog. We’re also under an Air Stagnation Advisory through Friday. This means that our air isn’t moving and pollutants are likely to get trapped at the surface. The Air Quality Index in Eugene has been fluctuating between good and moderate, but had dropped to the “Unhealthy for Sensitive Groups” category in Oakridge.

The ridge that is keeping our air stagnant will flatten out slightly Tuesday night. This will allow a weak front to pass through western Oregon, shutting down the off-shore winds at the coast and bringing back some clouds and possibly light rain for Wednesday morning and will drop temperatures five to ten degrees. The valley will continue to be stuck in the fog and central Oregon may see some extra cloud cover.

The ridge of high pressure will re-strengthen Wednesday afternoon, bringing back off-shore winds to the coast and stagnant weather for the rest of the Pacific Northwest through the weekend.

Have a great day!
~Meteorologist Melissa Frey

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