Here is my weekly new 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 36 in the Good category measuring Ozone
Oakridge: The Air Quality Index is 16 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 2 PM UNTIL 8 PM TODAY FOR STRONG 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 FIRE WEATHER WATCH IS IN EFFECT 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 FROM NOON MDT UNTIL 9 PM MDT SUNDAY 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.
- A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOWER COLUMBIA BASIN OF OREGON.
- A FIRE WEATHER WATCH IS IN EFFECT FROM THIS AFTERNOON THROUGH SUNDAY EVENING FOR ABUNDANT LIGHTNING FOR THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS AND THE CENTRAL BLUE MOUNTAINS.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL MIDNIGHT MDT SUNDAY NIGHT FOR THE OREGON LOWER TREASURE VALLEY.
- 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 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:
- Sunny and a bit warmer today, clear tonight,
- Sunny and a bit cooler Sunday, mostly clear Sunday night,
- Sunny and a bit cooler Monday, then clear Monday night.
- highs 95-93 lows 53-56.
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Sunny and a bit cooler Wednesday, mostly clear at night,
- Sunny and a bit warmer Thursday, mostly clear Thursday night,
- Then sunny Friday.
- highs 97-93 warming to 95 Thursday cooling to 92 Friday 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:
- Sunny and a bit warmer today with afternoon haze, clear and hazy tonight,
- Mostly sunny Sunday, mostly clear at night,
- Sunny and a bit warmer Monday, then clear Monday night.
- highs near 96 lows 59-62.
- Sunny and a bit warmer (HOT) Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit cooler Wednesday, mostly clear at night,
- Then mostly sunny Thursday, Friday, mostly clear Thursday night.
- 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:
- Some AM clouds, sunny and warmer this afternoon, mostly clear this evening, partly cloudy late tonight,
- Some AM clouds, sunny Sunday afternoon, mostly clear in the evening, then partly cloudy late Sunday night,
- Mostly sunny and a bit warmer Monday, then mostly clear Monday night,
- highs 73-75 lows near 52.
- Mostly sunny and a bit warmer Tuesday, partly cloudy Tuesday night,
- Partly cloudy and a bit cooler Wednesday, partly cloudy at night,
- Partly cloudy and a bit warmer Thursday, partly cloudy Thursday night,
- Then partly cloudy Friday.
- highs 76-73 warming to 75 Thursday and Friday 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:
- Sunny and a bit warmer today, mostly clear tonight,
- Sunny and a bit cooler Sunday, mostly clear Sunday night,
- Sunny and a bit cooler Monday, then clear Monday night.
- free air freezing level 16,000 ft. today and tonight 15,000 ft. Sunday, 16,000 ft. Sunday night then 15,000 ft. Monday and Monday night.
- highs 86-82 lows 53-52.
- Sunny and slightly warmer Tuesday, mostly clear Tuesday night,
- Sunny and a bit cooler Wednesday, mostly clear at night.
- Sunny and a bit warmer Thursday, mostly clear Thursday night,
- Then sunny and a bit warmer Friday.
- free air freezing level 14,000 ft. Tuesday, then 15,000 ft. Tuesday night through Friday.
- highs 85-82 warming to 84 Friday lows 54-52.
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