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More highs in the mid 90s today, but the workweek will cool off and hang around normal temperatures for the season. An upper level low pressure (the little “U” shaped dip in the yellow jet stream line has moved Eastward with a high pressure ridge (“Arch” shape) right behind it. Heat from Eastern Oregon is being pushed our way and will continue to heat us up again today, but it won’t last very long. A weak upper level trough will dip our way along with a weak cold front from Canada (see blue line with triangles on it) to cool us back down, at least back to the 80s. We could certainly use some moisture, but it’s just not out there for us. There may be some thunderstorms, but they might even start fires in the forests.
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Advisories: A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM TODAY FOR THE I-5 CORRIDOR FROM PORTLAND THROUGH EUGENE AND FOR THE CASCADES FOOTHILLS OF LANE COUNTY, AND THE WESTERN COLUMBIA RIVER GORGE.
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The updated Pollen Count Forecast for the Eugene-Springfield area : Trees LOW, Grass HIGH, and weeds LOW. (as of 7/22/10) Data from Allergy and Asthma Research Group.
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Here are your detailed forecasts. **
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Sunny and hot again today, mostly clear tonight high 96 low near 60. A mix of clouds and sun and cooler Monday and Tuesday with a slight (20%) chance of afternoon thunderstorms, partly cloudy Monday night and Tuesday night highs 87-82 lows 55-50. A mix of clouds and sun Wednesday, mostly clear in the evening, then mostly cloudy at night and Thursday AM, mostly sunny in the afternoon, and partly cloudy at night highs near 80-83 lows near 53. A mix of clouds and sun again Friday and Saturday, and partly cloudy at night highs 82-84 low 52 .(seasonal averages high 83 low 51)
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Forecast for the Umpqua Basin including, Roseburg: Partly cloudy this afternoon and tonight, then continued partly cloudy Monday and Monday night with a slight (20%) chance of scattered thunderstorms highs 95-88 lows 60-57. Partly cloudy Tuesday through Thursday highs 87-82-86 lows 60-54. Mostly clear Thursday night and Friday night, and mostly sunny Friday and Saturday lows 55 high 87-89. (seasonal averages high 87 low 55)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: AM clouds, then partly cloudy this afternoon and evening and mostly cloudy at night, AM clouds then partly cloudy with a slight (20%) chance of isolated afternoon and evening thunderstorms Monday, then mostly cloudy Monday night, a slight (20%) chance of isolated evening thunderstorms inland highs 66-62 (much warmer inland) lows near 52. Patchy AM fog, mostly cloudy Tuesday and Tuesday evening, and partly cloudy Tuesday night and Wednesday highs 64 low 55. Mostly cloudy Wednesday night and Thursday, then partly cloudy and breezy Thursday night through Saturday lows near 50 highs near 63. (seasonal averages high 67 low 53).
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Forecast for the Cascades of Lane County: Sunny this AM, partly cloudy with a slight (20%) chance of scattered afternoon thunderstorms, partly cloudy tonight with a slight (20%) chance of scattered thunderstorms, a mix of clouds and sun Monday with isolated AM thunderstorms and a (40%) chance of scattered thunderstorms in the morning and afternoon, then partly cloudy with a (40%) chance of scattered thunderstorms at night, free air freezing level 15,000 ft. and 14,000 ft. Monday night highs 84-80 lows 54-50. Partly cloudy Tuesday and Tuesday night with a (30%) chance of afternoon and evening thunderstorms, a mix of clouds and sun Wednesday and Thursday with mostly clear skies each night free air freezing level 14,000 ft. highs 78-74 lows near 48-44. Mostly sunny Friday and Saturday, and mostly clear Friday night free air freezing level holding steady at 14,000 ft. highs 76-78 low 45.
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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.