Jul
14.
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 no frontal systems sliding into Oregon. The graphics for days 3-7 Wednesday through Sunday show a cold frontal system pushing through the Pacific Northwest next Friday through Sunday.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 40 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 26 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 UNTIL 9 PM TODAY 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 UNTIL 11 PM TONIGHT FOR ABUNDANT LIGHTNING ON DRY FUELS 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 ABUNDANT LIGHTNING ON DRY FUELS UNTIL 11 PM TONIGHT FOR THE SISKIYOU MOUNTAINS.
- RED FLAG WARNING IS IN EFFECT FOR LIGHTNING ON DRY FUELS UNTIL 11 PM TONIGHT FOR THE SISKIYOU MOUNTAINS.
- A RED FLAG WARNING IS IN EFFECT FROM 11 AM UNTIL 9 PM MONDAY FOR DRY AND UNSTABLE CONDITIONS FOR THE SOUTHERN BLUE AND STRAWBERRY MOUNTAINS.
- A RED FLAG WARNING IS IN EFFECT FROM 11 AM UNTIL 9 PM MONDAY FOR THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, AND THE EASTERN ROGUE VALLEY.
- A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM MDT TONIGHT 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.
- AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR THE OREGON LOWER TREASURE VALLEY.
- A HEAT ADVISORY IS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR FOR BAKER COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR MALHEUR COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 10 PM TONIGHT 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.
- 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 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:
- Mostly clear tonight,
- Sunny and slightly cooler Monday, mostly clear Monday night,
- Sunny and slightly warmer (HOT) Tuesday, mostly cloudy with a slight (20% ) chance of evening thunderstorms, just partly cloudy late at night,
- Sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
- lows 54-56 cooling to 53 Wednesday night highs 94-95 cooling 88 Wednesday.
- Sunny and a bit warmer Thursday, mostly clear Thursday night,
- Sunny and a bit warmer Friday, clear Friday night,
- Sunny and slightly cooler Saturday, clear Saturday night,
- Then sunny and a bit cooler Sunday.
- highs 92-94 cooling to 90 Sunday lows 56-54 (seasonal averages high 84 low 52)
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EUGENE-SPRINGFIELD POLLEN COUNT:
GRASS: MODERATE (6)
TREES: LOW (8)
WEEDS: ABSENT (0)
Measured 7.14.24
Data courtesy of Oregon Allergy Associates.
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Forecast for the Umpqua Valley including Roseburg:
- Mostly clear this evening, partly cloudy late tonight,
- Sunny and hazy and a bit warmer (HOT) Monday, mostly clear Monday night and hazy late,
- Sunny with AM haze, partly cloudy and hazy and a bit cooler Tuesday, partly cloudy with a slight (20%) chance of thunderstorms at night,
- Mostly sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
- lows 62-58 highs 98-92.
- Mostly sunny and a bit warmer Thursday, mostly clear Thursday night,
- Mostly sunny Friday, mostly clear at night,
- Mostly sunny Saturday, clear Saturday night,
- Then sunny and a bit cooler Sunday.
- highs 93-90 lows 62-59. (seasonal average high 86 low 58)
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Becoming mostly cloudy late tonight with inland haze late,
- Some AM clouds with inland haze, sunny and a bit warmer Monday afternoon, mostly clear Monday night with inland haze late,
- Partly cloudy and hazy and a bit cooler Tuesday, mostly cloudy with a slight (20%) chance of evening coastal thunderstorms while partly cloudy with a slight (20%) chance of inland evening thunderstorms, just mostly cloudy late Tuesday night,
- Partly cloudy and a bit cooler Wednesday, then partly cloudy Wednesday night.
- lows near 52 highs 76-70.
- Some AM clouds , sunny and a bit warmer Thursday afternoon, partly cloudy Thursday night,
- Partly cloudy Friday, partly cloudy at night,
- Then partly cloudy and a bit cooler Saturday and Sunday, partly cloudy Sunday night.
- highs 75-72 lows 54-52. (seasonal average high 66 low 54)
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Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear this evening, partly cloudy late tonight,
- Sunny and a bit cooler Monday, mostly clear Monday night,
- Sunny and a bit warmer Tuesday with a slight (20%) chance of afternoon thunderstorms, mostly cloudy with a slight (20%) chance of evening thunderstorms, partly cloudy with a slight (20%) chance of thunderstorms late at night,
- Sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
- free air freezing level 15,000 ft. tonight 15,000 ft. tonight through. Monday night, 14,000 ft. Tuesday, 15,000 ft. falling to 14,000 ft. Tuesday night, then 15,000 ft. Wednesday and Wednesday night.
- lows 53-55 highs 83-87 cooling to 82 Wednesday.
- Sunny and Thursday, clear Thursday night,
- Sunny and a bit warmer Friday, mostly clear at night,
- Sunny and a bit warmer Saturday, mostly clear Saturday night,
- Then sunny and a bit cooler Sunday.
- free air freezing level 15,000 ft. Thursday, 16,000 ft. Thursday night and Friday, above 6,000 ft. Friday night, 16,000 ft. Saturday, above 16,000 ft Saturday night, then 16,000 ft. Sunday.
- highs 82-86 cooling to 83 Sunday lows 50-52.