Jul
17.
Here is my weekly weather quiz question. “What is the “Showalter Index?”
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An Upper Level Low is moving away from us but still producing sunshine with high temperatures in the 90s. The graphics for days 1-3 show a frontal system sliding into Oregon Friday. The graphics for days 3-7 Sunday through Thursday show a cold frontal system that pushed through the Pacific Northwest Saturday with another cold front sliding in between Monday and Tuesday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 32 in the Good category measuring Ozone.
Oakridge: The Air Quality Index is 29 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 26 in the Good category measuring Ozone.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH TUESDAY EVENING FOR THE OREGON LOWER TREASURE VALLEY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM NOON MDT TODAY UNTIL NOON MDT SATURDAY FOR THE OREGON LOWER TREASURE VALLEY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT FOR THE LOWER COLUMBIA BASIN OF OREGON.
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.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Sunny and a bit warmer today, mostly clear tonight,
- Sunny and a bit warmer Friday, clear at night,
- Sunny and a bit warmer Saturday, clear in the evening, then partly cloudy Saturday night.
- highs 88-94 lows 52-57.
- Mostly sunny and a bit cooler Sunday, mostly clear Sunday night,
- Mostly sunny Monday, clear at night,
- Sunny Tuesday, clear Tuesday night,
- Then sunny and a bit warmer Wednesday.
- highs 87-89 lows 53-50 (seasonal averages high 85 low 52)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: LOW (3)
TREES: LOW (5)
WEEDS: ABSENT (0)
Measured 7.16.24
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Patchy AM fog, sunny and a bit warmer this afternoon, mostly clear with patchy fog late tonight,
- Areas of AM fog, sunny and a bit warmer Friday afternoon, clear with patchy fog at night,
- Sunny and a bit warmer Saturday, then mostly clear with a slight (20%) chance of evening thunderstorms, then partly cloudy with a slight (20%) chance of thunderstorms late Saturday night.
- highs 92-93 lows 58-62.
- Mostly cloudy with a slight (20%) chance of AM thunderstorms, sunny and a bit cooler Sunday afternoon, mostly clear Sunday night,
- Mostly sunny Monday, clear at night,
- Sunny and a bit cooler Tuesday, clear Tuesday night,
- Then sunny and a bit warmer Wednesday.
- highs 86-92 lows 58-56 (seasonal averages high 85 low 52)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with patchy AM fog, sunny and a bit warmer this afternoon, mostly clear with patchy dense evening fog, partly cloudy with patchy fog late tonight,
- Some AM clouds with areas of fog, sunny Friday afternoon, mostly clear with patchy evening fog, mostly cloudy with patchy fog at night,
- AM clouds with patchy AM fog, sunny and a bit cooler Saturday afternoon, then mostly cloudy with a slight (20%) chance of thunderstorms Saturday night.
- highs 74-72lows 53-55.
- Mostly cloudy with a slight (20%) chance of AM thunderstorms, partly cloudy and a bit cooler Sunday, partly cloudy in the evening, mostly cloudy with patchy fog late Sunday night,
- Mostly sunny and a bit warmer Monday, mostly clear at night,
- Mostly sunny Tuesday, mostly clear Tuesday night,
- Then sunny and a bit warmer Wednesday.
- highs 70-73 lows 53-50. (seasonal average high 66 low 54)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit cooler today, mostly clear tonight,
- Sunny Friday, clear at night,
- Sunny and a bit warmer Saturday, mostly clear in the evening, then partly cloudy late Saturday night.
- free air freezing level 15,000 ft. rising to 16,000 ft. this afternoon, 15,000 ft. tonight, 15,000 ft. rising to 16,000 ft. Friday afternoon, then 16,000 ft. Saturday and Saturday night.
- highs 82-90 lows 50-54.
- Sunny and a bit cooler Sunday, mostly clear Sunday night,
- Sunny and a bit cooler Monday, mostly clear at night,
- Sunny Tuesday, clear Tuesday night,
- Then sunny and a bit warmer Wednesday.
- free air freezing level 16,000 ft. Sunday and Sunday night, above 16,000 ft. Monday and Monday night, then 16,000 ft. Tuesday through Wednesday.
- highs 82-80 warming to 82 Wednesday lows 52-48.
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