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Advisories: NONE AT THIS TIME.
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A high pressure ridge (“Arch” shape on brown line) has been building over us and will allow for another day of hot weather. The ridge will weaken Monday and Tuesday along with a weak cold front (position shown is Wednesday AM) that will slide by mainly north of us Tuesday not having any effect on our weather except to cool us down a bit and making us feel like the hot weather is over. The high pressure ridge will strengthen again for another round of increasing temperatures back to hot. [Earth is in a stream of debris from Comet Swift-Tuttle, source of the annual Perseid meteor shower. Worldwide observers are reporting more than 30 Perseids per hour, a number that could have tripled when Earth reached the heart of the debris zone today. Meteor shower forecasters recommend looking during the dark hours before dawn when activity is expected to be highest. The meteor shower will continue for a few more days with fewer meteors visible per hour. Visit http://spaceweather.com for sky maps, observing tips, and links to a live meteor radar].
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Clear this evening, partly cloudy tonight, a mix of clouds and sun Monday AM, sunny and a bit cooler Monday afternoon, partly cloudy Monday night and Tuesday AM, sunny in the afternoon, clear in the evening, partly cloudy Tuesday night, a mix of clouds and sun Wednesday AM, sunny and warmer in the afternoon, then clear Wednesday night lows 55-52 warming to 57 Tuesday night and back to 54 Wednesday night highs 89-87 warming to near 95 Wednesday. Sunny and warmer again Thursday, clear at night, mostly sunny and cooler Friday, mostly clear in the evening, mostly cloudy Friday night and Saturday AM, partly cloudy with a slight (20%) chance of thunderstorms Saturday afternoon and evening, mostly cloudy Saturday night and Sunday with a slight (20%) chance of thunderstorms Sunday AM highs 95-82 lows near 54. (seasonal averages high 83 low 52)
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Forecast for the Umpqua Basin including Roseburg: Clear tonight, sunny and a bit cooler Monday, mostly clear Monday night, sunny Tuesday, mostly clear in the evening, partly cloudy Tuesday night and Wednesday AM, sunny and warmer in the afternoon, then mostly clear Wednesday night lows 56-60 highs 92-95. Mostly sunny and warmer Thursday, mostly clear Thursday night, partly cloudy with a slight (20%) chance of thunderstorms Friday through Saturday night, partly cloudy Sunday AM, then sunny Sunday afternoon highs 96-86 lows 62-66 cooling to near 56 Saturday night. (seasonal averages high 85 low 56)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly clear this evening, cloudy with patchy coastal fog late tonight and Monday AM, sunny in the afternoon, partly cloudy with patchy fog late Monday night and early Tuesday AM, partly cloudy in the afternoon and evening, mostly cloudy with patchy fog late Tuesday night and Wednesday AM, sunny in the afternoon, partly cloudy with patchy fog late Wednesday night lows near 55 highs near 65. Partly cloudy with patchy AM and late night fog Thursday and Thursday night, patchy fog Friday AM, partly cloudy with a slight (20%) chance of thunderstorms Friday afternoon and Friday night, patchy fog Saturday AM, partly cloudy and even cooler Saturday afternoon through Sunday highs 72-66 lows 56-54. (seasonal averages high 65 low 53).
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Forecast for the Cascades of Lane County: Clear tonight, sunny and a bit cooler Monday, mostly clear and cooler Monday night, mostly sunny and even cooler Tuesday, mostly clear Tuesday night, partly cloudy Wednesday AM, sunny and warmer in the afternoon, then clear Wednesday night free air freezing level 15,000 ft. tonight and Monday, then 16,000 ft. Monday night through Wednesday night lows 58-52 warming to 58 Wednesday night highs 80-75 warming to 82 Wednesday. Mostly sunny and warmer Thursday, clear Thursday night, sunny Friday AM, partly cloudy in the afternoon, partly cloudy with a slight (20%) chance of thunderstorms late Friday night, mostly sunny with a slight (20%) chance of thunderstorms Saturday AM, partly cloudy with a slight (20%) chance of thunderstorms Saturday afternoon through Sunday AM, then mostly sunny Sunday afternoon free air freezing level 16,000 ft. Thursday through Friday night, 15,000 ft. Friday night, 15,000 ft. Saturday, then 14,000 ft. Saturday night and Sunday highs 85-70 lows 60-50.
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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.
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