Here is my weekly weather quiz question for the last time. “What is a “Sling Psychometer?” Here is the correct answer. A Sling Psychrometer is an instrument used to measure the water vapor content of the atmosphere in which wet and dry bulb thermometers are mounted on a frame connected to a handle at one end by means of a bearing or a length of chain. The psychrometer is whirled by hand to provide the necessary ventilation to evaporate water from the wet bulb.
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An Upper Level Low Pressure Trough in Canada and surface High Pressure off our coast keep the weather mild. The graphics for days 1-3 show no frontal systems moving through Oregon. The graphics for days 3-7 Tuesday through Saturday show a cold frontal system moving through the Pacific Northwest next Saturday.
ADVISORIES:
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL NOON MONDAY FOR KLAMATH COUNTY AND LAKE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON MONDAY FOR CROOK, DESCHUTES, GRANT, AND WHEELER COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL NOON MONDAY FOR BAKER, HARNEY, AND MALHEUR COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 5 PM TODAY DUE TO WILDFIRE SMOKE FOR EASTERN LANE COUNTY INCLUDING THE LANE COUNTY CASCADE FOOTHILLS AND THE CASCADES OF LANE COUNTY.
HEALTH ADVISORIES:
- 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:
- Sunny and a bit warmer today, mostly clear tonight,
- Mostly sunny Sunday, mostly clear in the evening, partly cloudy at night,
- Mostly sunny and a bit cooler with a slight (20%) chance of rain Monday, then mostly cloudy with a (30%) chance of rain Monday night.
- highs 86-84 lows 52-59.
- Mostly cloudy start, a mix of clouds and sun and a bit cooler Tuesday afternoon, partly cloudy in the evening, mostly clear late Tuesday night,
- Sunny and a bit warmer Wednesday, mostly clear Wednesday night,
- Sunny and a bit warmer Thursday, mostly clear Thursday night,
- Then sunny Friday.
- highs 83-95 lows near 58. (seasonal averages high 86 low 53)
Forecast for the Umpqua Valley including Roseburg:
- Sunny and a bit cooler today, mostly clear tonight,
- Some AM clouds, sunny and a bit warmer Sunday, mostly clear at night,
- Partly cloudy Monday with a slight (20%) chance of afternoon rain, then mostly cloudy with a slight (20%) chance of rain Monday night.
- highs 85-87 lows 57-64.
- Mostly cloudy start, partly cloudy and a bit cooler Tuesday afternoon, mostly clear Tuesday night,
- Mostly sunny and a bit warmer Wednesday and Thursday, mostly clear both nights,
- Some AM clouds, then sunny and a bit cooler Friday afternoon.
- highs 86-97 cooling to 95 Friday lows near 63 (seasonal averages high 88 low 59)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- AM clouds, sunny and a bit warmer this afternoon, partly cloudy this evening, mostly cloudy late tonight,
- AM clouds, sunny and a bit warmer Sunday, partly cloudy in the evening, mostly cloudy late at night,
- Mostly cloudy and a bit cooler Monday with a slight (20%) chance of afternoon rain, then mostly cloudy with a slight (20%) chance of rain Monday night.
- highs 72-74 cooling back to 72 Monday night lows 54-57.
- Mostly cloudy with a slight (20%) chance of AM rain, just mostly cloudy Tuesday afternoon, partly cloudy in the evening, mostly cloudy late Tuesday night,
- Mostly cloudy and a bit warmer Wednesday, partly cloudy at night,
- Partly cloudy Thursday and Thursday night,
- Then partly cloudy and a bit cooler Friday.
- highs 73-75 cooling back to 73 Friday lows near 55. (seasonal average high 67 low 54)
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and hazy and a bit cooler today, mostly clear and hazy tonight,
- Sunny Sunday, mostly clear at night,
- Sunny Monday, then mostly cloudy with a (40%) chance of rain Monday night.
- free air freezing level 14,000 ft. falling to 13,000 ft. this afternoon, 14,000 ft. falling to 13,000 ft tonight, 13,000 ft. Sunday, 14,000 ft. Sunday night, 14,000 ft. Monday, then snow level above 8,000 ft. Monday night.
- highs near 72 lows 44-49.
- Mostly sunny and a bit cooler with a slight (20%) chance of showers Tuesday, mostly clear in the evening, partly cloudy late Tuesday night,
- Sunny and a bit warmer Wednesday and Thursday, mostly clear both nights,
- Sunny and a bit warmer Thursday, mostly clear Thursday night,
- Then sunny Friday.
- free air freezing level snow level above 8,000 ft. Tuesday, then free air freezing level above 16,000 ft. Tuesday night through Friday.
- highs 69-85 lows 47-55.