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Advisories: NONE AT THIS TIME.
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A high pressure ridge (“Arch” shape on brown line) is building over us and will allow for two days of hot weather. The ridge will weaken Monday and Tuesday along with a weak cold front that will slide by mainly north of us next 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 entering a stream of debris from Comet Swift-Tuttle, source of the annual Perseid meteor shower. Worldwide observers are now reporting more than 30 Perseids per hour, a number that could triple when Earth reaches the heart of the debris zone Sunday. Meteor shower forecasters recommend looking during the dark hours before dawn, especially Sunday morning, August 12th, 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: Mostly clear and hazy tonight, sunny and hot Sunday, partly cloudy Sunday night, AM clouds, sunny and a bit cooler Monday afternoon, clear in the evening, partly cloudy Monday night, a mix of clouds and sun Tuesday AM, mostly sunny in the evening, then clear Tuesday night lows 52-55 highs 93-84. Sunny and warmer again Wednesday and Thursday with clear nights, then mostly sunny and cooler Friday and Saturday and mostly clear Friday night highs 92-95 cooling to near 83 Saturday lows near 54. (seasonal averages high 83 low 52)
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Forecast for the Umpqua Basin including Roseburg: Clear tonight, sunny and hot Sunday, mostly clear Sunday night, mostly sunny and a bit cooler Monday, then mostly clear Monday night, mostly sunny Tuesday, then mostly clear Tuesday night lows 56-54 warming to 58 Tuesday night highs 95-90. Mostly sunny and warmer Wednesday and Thursday, mostly sunny and cooler Friday with mostly clear nights, then sunny and much cooler Saturday highs 94-97 cooling to 84 Saturday lows 59-56. (seasonal averages high 86 low 56)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly clear this evening, partly cloudy with patchy coastal fog late tonight, mostly cloudy Sunday AM with patchy coastal fog, sunny Sunday afternoon, mostly clear in the evening, partly cloudy with patchy coastal fog late Sunday night and Monday AM, partly cloudy in the afternoon and Monday night with patchy coastal fog late at night and early Tuesday AM, partly cloudy with patchy lingering afternoon fog, then partly cloudy with patchy fog late Tuesday night lows near 55 highs 65-67 cooling to 65 Tuesday. Partly cloudy with patchy AM and late night fog Wednesday through Friday AM, sunny and cooler Friday afternoon, mostly clear in the evening, partly cloudy with patchy fog late Friday night and Saturday AM, then partly cloudy and even cooler Saturday afternoon highs 65-78 cooling to 65 Saturday lows 58-54. (seasonal averages high 65 low 53).
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Forecast for the Cascades of Lane County: Mostly clear with patchy smoke tonight, sunny and warmer Sunday, clear at night, sunny and a bit cooler Monday, mostly clear Monday night, mostly sunny and even cooler Tuesday, then clear Tuesday night free air freezing level 16,000 ft. tonight and Sunday, 15,000 ft. Sunday night through Tuesday night lows 49-52 cooling to 46 Tuesday night highs 85-75. Sunny and warmer Wednesday and Thursday with clear nights, then mostly sunny and cooler Friday and Saturday with mostly cloudy skies at night free air freezing level 15,000 ft. Wednesday, 16,000 ft. Wednesday night, 15,000 ft. through Thursday night, 15,000 ft. Friday and Friday night, then 14,000 ft. Saturday highs 79-84 cooling to near 72 Saturday lows 50-53 cooling to near 47 Friday night.
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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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