Here is my new weekly weather quiz question. “What is a “Polar Front?”

ADVISORIES:

• A WINTER STORM WARNING IS IN EFFECT UNTIL 1 AM TUESDAY ABOVE 1,000 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS AND THE NORTHERN OREGON CASCADES.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 1 AM TUESDAY ABOVE 1,000 FT. FOR THE CASCADE FOOTHILLS IN LANE COUNTY, AND THE CASCADES IN LANE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 1 AM TUESDAY ABOVE 1,000 FT. FOR THE UPPER HOOD RIVER VALLEY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 1 AM TUESDAY FOR NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 1 AM TUESDAY FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 4 PM TODAY ABOVE 3,000 FT. FOR THE EAST SLOPES OF THE OREGON CASCADES.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM TUESDAY ABOVE 3,000 FT. FOR THE NORTHERN BLUE MOUNTAINS OF OREGON.UNTIL 1 AM TUESDAY ABOVE 2,500 FT. FOR JACKSON COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 AM TUESDAY ABOVE 1,000 FT. THE COAST RANGE OF NORTHWEST OREGON.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 1 AM TUESDAY ABOVE 1,000 FT. FOR THE CENTRAL COAST RANGE OF OF WESTERN OREGON.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM TUESDAY ABOVE 4,000 FT. FOR THE SOUTHERN BLUE MOUNTAIN OF OREGON, THE OCHOCO, AND THE JOHN DAY HIGHLANDS.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM TUESDAY ABOVE 2,500 FT. FOR WALLOWA COUNTY.
• A WIND ADVISORY IS IN EFFECT UNTIL 3 PM TODAY FOR THE LOWER COLUMBIA BASIN OF OREGON, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
• A WIND ADVISORY IS IN EFFECT FROM 11 AM MST UNTIL 8 PM MST TONIGHT FOR THE OREGON LOWER TREASURE VALLEY.
• A WIND ADVISORY IS IN EFFECT FROM 1AM UNTIL 10 PM TONIGHT FOR 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.

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• Mostly cloudy with AM snow and rain, colder with rain showers and snow showers with a slight (20%) chance of thunderstorms this afternoon and evening (0.25 in. of rain possible, 2-3 in. of snow possible, snow level 1,500 ft.), a good (50%) chance of rain and snow late tonight ( 0.10 in. of rain possible, 1-2 in. of snow possible, snow level 1,000 ft.),
• Mostly cloudy with a (40%) chance of rain and snow and a bit warmer Tuesday (under 0.10 in. of rain possible, snow level 1,000 ft. rising to 2,000 ft.,) a (40%) chance of evening rain and snow, a (40%) chance  of rain late at night (under 0.10 in. of rain possible, snow level 2,500 ft rising to 3,500 ft. late at night),
• Mostly cloudy with AM rain likely (70%), a bit warmer with rain Wednesday afternoon, then rain and breezy Wednesday night.
• highs 60-47 warming to 49 Tuesday lows 35-43.
• Mostly cloudy with rain and snow and  a bit cooler Thursday (AM snow possibly heavy at times), rain and snow Thursday night,
• Mostly cloudy with rain and snow and a bit cooler Friday, evening rain and snow likely (70%), snow likely (70%) late at night,
• Mostly cloudy with AM rain and snow likely (70%), rain and snow Saturday afternoon, a good (50%) chance of rain and snow Saturday night,
• Then mostly cloudy with a (40%) chance of rain and snow Sunday.
• highs 52-43 lows 39-32t. (seasonal average high 56 low 38)

Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy with AM coastal rain likely (70%) while inland AM rain and snow, a bit cooler with showers likely (70%) and a slight (20%) chance of  thunderstorms this afternoon (0.10 in. of rain possible, no snow accumulation expected, snow level 1,500 ft.), a (40%) chance of evening coastal showers with a slight (20%) chance of thunderstorms and a (40%) chance of coastal rain late tonight while inland evening showers with snow likely (70%) and a slight (20%) chance of thunderstorms and a (40%) chance of inland rain and snow late tonight (0.10 in. of rain possible, no snow accumulation expected, snow level 1,500 ft.),
• Mostly cloudy with a (30%) chance of coastal rain Tuesday while a (30%) chance of inland AM rain and snow and a (30%) chance of inland rain in the afternoon (0.10 in. of rain possible), rain likely (70%) at night (0.25 in. of rain possible),
• Then mostly cloudy and a bit warmer with rain and breezy Wednesday, rain and windy Wednesday night,
• highs 56-49 lows 38-44.
• Mostly cloudy with AM rain, a bit cooler with rain snow and breezy Thursday afternoon, rain and snow and breezy Thursday night,
• Mostly cloudy and breezy with rain and snow and a bit cooler Friday, evening rain and snow, rain and snow likely (70%) late Friday night,
• Mostly cloudy with AM rain and snow likely (70%), and a bit warmer with rain likely (70%) Saturday afternoon, rain and snow likely (70%) Saturday night,
• Mostly cloudy with a good (50%) chance of AM rain and snow, then a (40%) chance of rain Sunday afternoon.
• highs 53-44 warming to 46 Friday night lows 42-36. (seasonal average high 55 low 41)