Jul
13.
Here is my weekly weather quiz question for the last time. “What is a “Severe Thunderstorm?” Here is the correct answer. A Severe Thunderstorm is a thunderstorm that produces a tornado, winds of at least 58 mph (50knots), and/or hail at least 1″ in diameter. Structural wind damage may imply the occurrence of a severe thunderstorm. A thunderstorm wind equal to or greater than 40 mph (35 knots) and/or hail of at least 1″ is defined as approaching severe.
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Upper Level High Pressure over the 4 corners area keeps us in sunshine with high temperatures in the 90s. The graphics for days 1-3 show a weak frontal system sliding into Washington and Oregon Sunday. The graphics for days 3-7 Tuesday through Saturday show a cold frontal system pushing through the Pacific Northwest next Friday and Saturday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 57 in the Good category measuring Ozone
Oakridge: The Air Quality Index is 26 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 34 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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ADVISORIES:
- A RED FLAG WARNING IS IN EFFECT FROM 11 AM UNTIL 9 PM SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON.
- A RED FLAG WARNING IS IN EFFECT FOR STRONG GUSTY WINDS AND FOR GUSTY WIND AND LOW RELATIVE HUMIDITY FROM SUNDAY MORNING THROUGH SUNDAY EVENING FOR GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE KLAMATH BASIN, THE FREEMONT-WINEMA NATIONAL FOREST, AND SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
- A RED FLAG WARNING IS IN EFFECT FOR LIGHTNING ON DRY FUELS FROM 2 AM UNTIL 11 PM SUNDAY FOR THE SISKIYOU MOUNTAINS.
- A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM SUNDAY FOR DRY AND UNSTABLE CONDITIONS FOR THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS.
- A FIRE WEATHER WATCH IS IN EFFECT FOR LIGHTNING ON DRY FUELS FROM SUNDAY EVENING THROUGH SUNDAY EVENING FOR GUSTY WIND AND LOW RELATIVE HUMIDITY FOR THE KLAMATH BASIN, THE FREEMONT-WINEMA NATIONAL FOREST, AND SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
- A RED FLAG WARNING IS IN EFFECT FROM NOON MDT UNTIL 9 PM MDT SUNDAY FOR LIGHTNING FOR THE BURNS BLM AND THE VALE BLM.
- A RED FLAG WARNING IS IN EFFECT FROM NOON MDT UNTIL 9 PM MDT TONIGHT FOR LIGHTNING FOR THE BURNS BLM AND THE VALE BLM.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR LIGHTNING FOR THE BURNS BLM AND THE VALE BLM.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL MIDNIGHT MDT SUNDAY NIGHT FOR THE OREGON LOWER TREASURE VALLEY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR BAKER COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM MIDNIGHT MDT TONIGHT UNTIL 11 PM SUNDAY FOR FOR BAKER COUNTY.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR MALHEUR COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM MIDNIGHT MDT SATURDAY NIGHT UNTIL MIDNIGHT MDT SUNDAY NIGHT FOR MALHEUR COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 10 PM SUNDAY FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON THE LOWER COLUMBIA BASIN OF OREGON, THE GRANDE RONDE VALLEY, THE SOUTHERN BLUE MOUNTAINS OF OREGON, THE JOHN DAY BASIN, THE OCHOCO, THE JOHN DAY HIGHLANDS, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND CENTRAL OREGON.
- A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM TONIGHT FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM TONIGHT FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 5 PM MONDAY FOR KLAMATH AND LAKE COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 12 PM MONDAY FOR SHERMAN AND WASCO COUNTIES.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 12 PM MONDAY FOR NORTHERN HARNEY AND NORTHERN AND MALHEUR COUNTIES.
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:
- Clear tonight,
- Sunny and slightly cooler Sunday, mostly clear Sunday night,
- Sunny and a bit cooler Monday, mostly clear at night,
- Sunny and a bit warmer (HOT) Tuesday, then partly cloudy Tuesday night.
- lows near 55 highs 95-93 warming to 98 Tuesday.
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Then sunny Thursday, Friday and Saturday, clear each night.
- highs near 92 lows near 57 (seasonal averages high 84 low 52)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: LOW (3)
TREES: LOW (3)
WEEDS: ABSENT (0)
Measured 7.11.24
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Clear and hazy tonight,
- Sunny and hazy Sunday, evening haze, mostly clear late Sunday night,
- Sunny and a bit warmer Monday, mostly clear at night,
- Sunny and a bit warmer (HOT) Tuesday, then partly cloudy Tuesday night.
- lows 59-62 highs near 96.
- Mostly sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Then mostly sunny Thursday, mostly clear at night,
- Mostly sunny and a bit warmer Friday, mostly clear Friday night,
- Then mostly sunny and slightly cooler Saturday.
- highs 100-93 lows near 62. (seasonal average high 86 low 57)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Becoming mostly late tonight with inland haze late,
- Some AM clouds and hazy, sunny and warmer Sunday with afternoon haze, mostly clear with inland evening haze, partly cloudy late Sunday night,
- Some AM clouds, sunny and a bit warmer Monday afternoon, mostly clear in the evening, partly cloudy late at night,
- Partly cloudy and a bit warmer Tuesday, then mostly cloudy Tuesday night.
- lows near 52 highs 73-75 cooling back to 73 Tuesday.
- Mostly cloudy and a bit cooler Wednesday, mostly cloudy Wednesday night,
- Partly cloudy and a bit warmer Thursday, partly cloudy at night,
- Partly cloudy and a bit warmer Friday, partly cloudy Friday night,
- Then partly cloudy and a bit cooler Saturday.
- highs 72-75 cooling to 73 Saturday lows near 53. (seasonal average high 66 low 54)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear tonight,
- Sunny and a bit cooler Sunday, partly cloudy Sunday night,
- Sunny and a bit cooler Monday, mostly clear at night,
- Sunny and slightly warmer Tuesday, then partly cloudy with a slight (20%) chance of thunderstorms Tuesday night.
- free air freezing level 16,000 ft. tonight 15,000 ft. Sunday through Monday, 15,000 ft. Monday night, 14,000 ft. Tuesday, then 15,000 ft. Tuesday night.
- lows 53-52 highs 84-82 warming to 86 Tuesday.
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night.
- Sunny and a bit warmer Thursday, clear at night,
- Sunny Friday, clear Friday night,
- Then sunny and a bit warmer Saturday.
- free air freezing level 15,000 ft. Wednesday, then 16,000 ft. Wednesday night through Saturday.
- highs 85-82 warming to 84 Friday lows 54-52.
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