Check out my latest Eugene Daily News Weather Or Not column:
http://eugenedailynews.com/2018/04/it-was-their-month-in-history-but-why-didnt-we-know-about-them/
__________
Here is my weekly weather quiz question. What is “Differential Motion?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs. Good luck.
________________
An Upper Level Low Pressure Trough (Shaded “U” shape with arrows) has taken over sending us storms. The graphics for days 1-3 show the complex frontal system moving in today. The graphics for days 3-7 show the frontal systems that will move through the Pacific Northwest Saturday and Sunday, then a frontal system moves toward the coast next Wednesday.
________________
Air Quality Index:
Eugene/Springfield: The Air Quality Index is 9 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 13 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA)
________________
Advisories:
- A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 7 PM THURSDAY FOR THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
- A WINTER WEATHER ADVISORY IS IN EFFECT FROM 2 PM THIS AFTERNOON UNTIL 2 AM THURSDAY ABOVE 5,000 FT. FOR THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
- A WIND ADVISORY IS IN EFFECT FROM 2PM THIS AFTERNOON UNTIL 8 PM THIS EVENING FOR CENTRAL AND EASTERN LAKE COUNTY.
- A PERMANENT HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER BAR. POOLS IN THE BEDROCK ALONG THE RIVERS EDGE ARE KNOWN TO DEVELOP BLUE-GREEN ALGAE (CYANOBACTERIAL) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE RIVER.
________________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- A bit cooler with rain today (0.50 in. of rain possible), showers tonight (0.25 in. of rain possible),
- Mostly cloudy with showers and a bit cooler Thursday (0.25 in. of rain possible), showers likely (70%) Thursday night (0.10 in. of rain possible),
- Cloudy with AM rain likely (70%), a bit warmer with a good (50%) chance of rain Friday afternoon, then mostly cloudy with a (30%) chance of rain at night.
- highs 53-50 warming to 58 Friday lows 39-42.
- Mostly cloudy with a (40%) chance of rain and a bit warmer Saturday, rain likely (70%) Saturday night and Sunday (a bit cooler), cloudy with a good (50%) chance of showers Sunday night,
- Showers likely (70%) and a bit cooler Monday, a good (50%) chance of showers at night,
- Then mostly cloudy and a bit warmer with a (40%) chance of showers Tuesday.
- highs 63-53 warming to 55 Tuesday lows 43-37. (seasonal averages high 60 low 39)
_____
Eugene-Springfield Pollen Count
Grass………. Low (0)
Trees………. Very High (755)
Last Counted: 4/7/18
Data Courtesy of Oregon Allergy Associates.
_________________
Forecast for Roseburg:
- Mostly cloudy with rain and a bit cooler today (0.25 in. of rain possible, snow level 3,500 ft.), rain and snow showers late tonight (0.25 in. of rain possible) and (a bit cooler) Thursday (0.25 in. of rain possible, snow level 2,000 ft. rising to 3,000 ft. in the afternoon), cloudy with a (40%) chance of showers Thursday night (under 0.10 in. of rain possible, snow level 3,000 ft.),
- Cloudy and a bit warmer with a (30%) chance of showers Friday, then mostly cloudy with a slight (20%) chance of showers at night.
- highs 54-52 warming to 60 Friday lows 38-42.
- Mostly cloudy and a bit warmer with a slight (20%) chance of rain Saturday, a good (50%) chance of rain Saturday night,
- Rain and a bit cooler Sunday, a (40%) chance of showers at night,
- Mostly cloudy and a bit cooler with rain and snow showers likely (70%) Monday, then mostly cloudy with a (40%) chance of showers Monday night and Tuesday (a bit warmer).
- highs 64-54 warming to 56 Tuesday lows 43-39. (seasonal averages high 61 low 41)
_____________________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- AM coastal rain with coastal showers and a bit cooler this afternoon while inland rain and a bit cooler (0.75 in. of rain possible), coastal showers with a slight (20%) chance of thunderstorms tonight while inland evening showers and a slight (20%) chance of thunderstorms with inland showers late tonight (0.25 in. of rain possible),
- Mostly cloudy with showers Thursday (0.25 in. of rain possible), a (40%) chance of showers Thursday night (under 0.10 in. of rain possible),
- Cloudy and a bit warmer with a (40%) chance of showers Friday, then mostly cloudy and a bit warmer with a slight (20%) chance of showers at night.
- highs 57-52 lows 40-44.
- Mostly cloudy with a slight (20%) chance of rain and a bit warmer Saturday, rain likely (70%) Saturday night and Sunday (a bit cooler), a (40%) of showers Sunday night,
- Showers likely (60%) Monday, then mostly cloudy with a (40%) chance of showers and a bit warmer Monday night and Tuesday.
- highs 56-58 cooling to 53 Sunday and Monday lows 44-42. (seasonal averages high 55 low 43)
________________
Forecast for the Cascades in Lane County:
- Rain and snow and a bit cooler today (0.50 in. of rain possible, 1-4 in. of snow possible), evening rain and snow showers, snow showers late tonight (0.50 in. of rain possible, 2-5 in. of snow possible),
- Mostly cloudy and a bit cooler with snow showers Thursday (2-5 in. of snow possible), evening snow showers likely (70%), rain and snow showers likely (70%) late at night (2 in. of snow possible),
- Cloudy and a bit warmer with AM rain and snow likely (70%) Friday, then a slight (20%) chance of rain Friday night.
- snow level 3,500 ft. today, 2,500 ft. tonight, 2,000 ft. Thursday, 3,000 ft. Thursday night and Friday, then 5,500 ft. Friday night.
- highs 40-35 warming to 43 Friday lows 24-30.
- Mostly cloudy with a slight (20%) chance of rain and snow and a bit warmer Saturday, a good (50%) chance of rain and snow at night,
- Mostly cloudy with rain and snow likely (70%) and a bit cooler Sunday, rain and snow showers likely (70%) and a bit cooler Sunday night,
- Snow showers likely (70%) and a bit cooler Monday, a good (50%) chance of rain and snow showers at night,
- Then a mix of clouds and sun and a bit warmer with a (30%) chance of rain and snow showers Tuesday.
- snow level 5,000 ft. Saturday, 5,500 ft. Saturday night, 4,000 ft. Sunday, 3,500 ft. Sunday night, 2,500 ft. Monday, then 3,000 ft. Monday night and Tuesday.
- highs 48-37 warming to 39 Tuesday lows 32-25.
________________
**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.
________________
Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.
________________