Here is my weekly weather quiz question for the last time. “What is the “Saffir-Simpson Hurricane Wind Scale?” Here is the correct answer. The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 categorization based on the hurricane’s intensity at the indicated time. The scale provides examples of the type of damage and impacts in the United States associated with winds of the indicated intensity. In general, damage rises by about a factor of four for every category increase. The maximum sustained surface wind speed (peak 1-minute wind at the standard meteorological observation height of 10 m [33 ft] over unobstructed exposure) associated with the cyclone is the determining factor in the scale. The scale does not address the potential for other hurricane-related impacts, such as storm surge, rainfall-induced floods, and tornadoes.
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An Upper Level Low Pressure Trough (“U” shape) allows frontal movement through the Pacific Northwest. The graphics for days 1-3 show a weak cold front moving through the Pacific Northwest Friday. The graphics for days 3-7 Tuesday through Saturday show no frontal systems pushing through the Pacific Northwest through the period.
ADVISORIES:
- A FREEZE WARNING IS IN EFFECT FROM 1 AM UNTIL 8 AM SUNDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE 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:
- Mostly clear this evening, partly cloudy late tonight,
- A mix of clouds and sun and a bit cooler with a (40%) chance of showers Sunday afternoon (Father’s Day), partly cloudy with a slight (20%) chance of evening showers, becoming mostly clear late Sunday night,
- Mostly sunny and a bit warmer Monday, partly cloudy in the evening, mostly clear late at night,
- Sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- lows 42-47 highs 66-77.
- Sunny and a bit warmer Wednesday (Juneteenth), partly cloudy Wednesday night,
- Sunny Thursday, mostly clear in the evening, partly cloudy late at night,
- Mostly sunny Friday, mostly clear Friday night,
- Then sunny and a bit cooler Saturday.
- highs 84-82 lows near 52. (seasonal averages high 73 low 47)
Forecast for the Umpqua Valley including Roseburg:
- Mostly clear this evening, partly cloudy with patchy fog late tonight,
- Partly cloudy and a bit warmer Sunday (Father’s Day), mostly clear Sunday night,
- Some AM clouds, sunny and a bit warmer Monday, mostly clear at night,
- Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night.
- lows 45-52 highs 69-82.
- Some AM clouds, sunny and a bit warmer Wednesday afternoon (Juneteenth), partly cloudy Wednesday night,
- Then mostly sunny Thursday, Friday, and Saturday, mostly clear Thursday night and Friday night,
- highs near 86 lows near 55. (seasonal average high 76 low 52)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly clear this evening, partly cloudy with patchy fog late tonight,
- AM sun, partly cloudy and a bit warmer Sunday afternoon (Father’s Day), mostly clear with patchy inland fog late Sunday night,
- Partly cloudy and a bit warmer Monday, mostly clear at night,
- Sunny and a bit warmer Tuesday, mostly clear in the evening, then partly cloudy with patchy fog late Tuesday night,
- lows 43-47 highs 63-68.
- Some AM clouds, sunny Wednesday (Juneteenth), partly cloudy with in the evening, mostly cloudy with patchy fog late Wednesday night,
- Patchy AM and late night fog, partly cloudy Thursday and at night,
- Patchy AM fog, partly cloudy Friday afternoon, mostly clear in the evening, partly cloudy Friday night,
- Some AM clouds, then sunny and a bit warmer Saturday afternoon,
- highs 68-70 lows near 50. (seasonal average high 63 low 51)
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Partly cloudy tonight,
- A mix of clouds and sun and a bit cooler with a good (50%) chance of showers Sunday afternoon (under 0.10 in. of rain possible), mostly cloudy with a good (50%) chance of evening showers, a slight (20%) chance of showers late Sunday night,
- A slight (20%) chance of AM snow showers, mostly sunny and a bit warmer with a slight (20%) chance of showers Monday afternoon, becoming mostly clear at night,
- Sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- free air freezing level 6,500 ft. falling to 6,000 ft. tonight, snow level 5,500 ft. Sunday afternoon, 4,500 ft. Sunday night and Monday, free air freezing level 8,000 ft. falling to 9,000 ft. late Monday night, 10,000 ft. Tuesday, then 11,000 ft. Tuesday night.
- lows 29-40 highs 50-65.
- Sunny and a bit warmer Wednesday (Juneteenth), partly cloudy Wednesday night,
- Sunny and a bit warmer Thursday, mostly clear in the evening, partly cloudy late at night,
- Sunny and a bit warmer Friday, mostly clear Friday night,
- Then sunny Saturday.
- free air freezing level 11,000 ft. Wednesday, 12,000 ft. Wednesday night, 13,000 ft. Thursday through Friday, 14,000 ft. Friday night, then 15,000 ft. Saturday.
- highs 72-75 lows 44-47.