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EUGENE, Ore. -- It was a foggy start to the work week, but fog and low clouds will be lifting throughout Monday morning. Monday afternoon will see sunshine and highs around 63 degrees. The normal high temperatures for the date is 66 degrees.
Monday: Mostly sunny. Highs in mid 60s
Tuesday: Increasing clouds, showers late. Highs in mid 60s
Wednesday: Rain. Highs in low 60s
Thursday: Showers. Highs in low 60s
Friday: Iso. showers. Highs in upper 50s
Saturday: Rain. Highs in mid 50s
Sunday: Showers. Highs in upper 50s
Clouds will begin to increase Monday night ahead of a pair of frontal systems that will arrive on Tuesday night and Wednesday. Models show the first front slow as it approaches the coast, while the second and stronger front will speed up due to strong jet stream winds near the front. With that said, expect rain to develop along the coast Tuesday night, then spread inland throughout the day.
Wednesday’s second front will also incorporate moisture and energy from former Typhoon Hagibis, that made landfall near Tokyo, Japan, over the weekend, killing more than 50 people and dropping more than 35 inches of rain.
This will increase rainfall potential across our area, with a moderate atmospheric river setting up along the Washington-Oregon state line. The heaviest rain be along the coast range and higher elevations, with 1 to 3 inches possible by Thursday morning. Inland valleys will likely receive 0.50 to 1 inches. Rivers are still running low, being early on in rain season, so river flooding is not expected, but localized urban flooding is possible.
Models are in good agreement of several rounds of rain and showers expected all the way through the weekend. Thursday afternoon will see an increase in rain coverage as a front drops southward across the region. It also appears that the upper atmosphere will be cold enough to support a thunderstorm or two.
Friday showers will become more isolated, but heavier, wet weather is expected on Saturday and Sunday. Both European and American models also suggest the possibility of an atmosphere river developing late Sunday into next week.
Right now, models point to additional 1 to 3 inches of rain for the coast and 2 to 5 inches for the Coast Range and Cascades from Thursday through Saturday.
For more weather information, go to the KEZI 9 News StormTracker 9 weather page.