Here is my weekly weather quiz question for the last time. “What is a “Radiosonde?” Here is the correct answer. A Radiosonde is an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure and humidity by means of a small, expendable radio transmitter. Radiosondes can be tracked by radar, radio direction finding, or navigation systems (such as the satellite Global Positioning System) to obtain wind data.
__________
ADVISORIES:
- A FLOOD WARNING IS IN EFFECT UNTIL EARLY FRIDAY APRIL 19 TH FOR THE OWYHEE RIVER BELOW THE OWYHEE DAM AFFECTING MALHEUR 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 cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, a slight (20%) chance of showers late tonight (0.50 in. of rain possible, more in storms),
- Mostly sunny with a slight (20%) chance of AM showers, mostly sunny and a bit warmer Sunday afternoon, partly cloudy in the evening, mostly cloudy late Sunday night,
- Mostly cloudy start, a mix of clouds and sun and a bit cooler Monday afternoon, mostly cloudy at night,
- A mix of clouds and sun and a bit warmer Tuesday, then partly cloudy Tuesday night.
- lows 46-38 highs 63-59 warming to 60 Tuesday.
- Sunny and a bit warmer Wednesday and Thursday, mostly clear both nights,
- Sunny and a bit warmer Friday, mostly clear Friday night,
- Then mostly sunny and a bit cooler Saturday.
- highs 66-75 cooling to 73 Saturday lows 39-44. (seasonal averages high 61 low 40)
- Mostly cloudy with evening showers and a slight (20%) chance of thunderstorms, showers likely (70%) tonight, a good (50%) chance of showers late tonight, (0.25 in. of rain possible),
- Mostly cloudy with a (30%) chance of showers and a bit cooler Sunday (under 0.10 in. of rain possible), just mostly cloudy Sunday night,
- Mostly cloudy start, partly cloudy and a bit warmer Monday afternoon, partly cloudy in the evening, mostly cloudy late at night,
- AM clouds, partly cloudy and a bit warmer Tuesday afternoon, then partly cloudy Tuesday night.
- lows 48-42 highs 59-63.
- Partly cloudy and a bit warmer Wednesday, partly cloudy in the evening, mostly clear late Wednesday night,
- Sunny start, partly cloudy and warmer Thursday, mostly clear at night,
- Mostly sunny and a bit warmer Friday, mostly clear Friday night,
- Then partly cloudy and a bit cooler Saturday.
- highs 69-79 cooling to 75 Saturday lows 43-48. (seasonal averages high 62 low 42)
____________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with evening coastal showers likely (70%) while inland evening showers likely (70%) with a slight (20%) chance of inland thunderstorms, a good (50%) chance of showers late tonight (0.10 in. of rain possible),
- Mostly cloudy with a (30%) chance of AM showers, just mostly cloudy and a bit cooler Sunday afternoon and Sunday night,
- Mostly cloudy start, partly cloudy and a bit warmer Monday afternoon and evening, mostly cloudy at night,
- AM clouds, partly cloudy and a bit warmer Tuesday afternoon, mostly cloudy in the evening, then partly cloudy late Tuesday night.
- lows 46-42 highs 55-57.
- Partly cloudy and a bit warmer Wednesday, partly cloudy Wednesday night,
- Mostly sunny and a bit warmer Thursday, partly cloudy at night,
- Partly cloudy Friday and Friday night,
- Partly cloudy with a slight (20%) chance of AM rain, then just partly cloudy and a bit cooler Saturday afternoon.
- highs 60-67 cooling to 63 Saturday lows 43-46. (seasonal average high 56 low 44)
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with evening showers and a good (50%) chance of thunderstorms, a good (50%) of showers with a slight (20%) chance of thunderstorms late tonight (0.50 in. of rain possible, more in storms with gusty winds and small hail possible),
- Mostly cloudy with a (30%) chance of AM showers and a slight (20%) chance of thunderstorms, cooler with a slight (20%) chance of showers Sunday afternoon (under 0.10 in. of rain possible, more in storms with AM gusty winds and small hail possible), a good (50%) chance of evening showers, a slight (20%) chance of evening showers, just mostly cloudy late Sunday night,
- Mostly cloudy with a slight (20%) chance of AM snow showers, mostly sunny with a slight (20%) chance of snow showers and a bit cooler Monday afternoon, a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of snow snow showers at night,
- A mix of clouds and sun and a bit warmer Tuesday, mostly cloudy in the evening, then partly cloudy late Tuesday night.
- snow level 8,000 ft. tonight, 7,000 ft. Sunday, 6.000 ft. Sunday evening, 3,500 ft. Monday and Monday night, free air freezing level 6,000 ft. Tuesday, then 7,000 ft. Tuesday night.
- lows 38-29 warming to 32 Tuesday night highs 45-48.
- Mostly sunny and a bit warmer Wednesday, mostly clear Wednesday night,
- Sunny and a bit warmer Thursday, partly cloudy in the evening, mostly clear late at night,
- Sunny and a bit warmer Friday, mostly clear Friday night,
- Then mostly cloudy with a slight (20%) chance of rain and snow showers Saturday.
- free air freezing level 8,000 ft. Wednesday, 9,000 ft. Wednesday night and Thursday, 10,000 ft. Thursday night and Friday, then snow level 6,500 ft. Saturday.
- highs 53-62 lows 33-37.