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

ADVISORIES:

• A WINTER STORM WARNING IS IN EFFECT FROM 4 PM TODAY UNTIL 6 AM FRIDAY ABOVE 1,000 FT. FOR THE NORTHERN OREGON CASCADE FOOTHILLS,  THE NORTHERN OREGON CASCADES, THE CASCADE FOOTHILLS IN LANE COUNTY, AND THE CASCADES IN LANE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT FROM 4 PM TODAY UNTIL 4 AM FRIDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT FROM 4 PM TODAY UNTIL 1 AM FRIDAY FOR THE SOUTH CENTRAL OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE SOUTHERN OREGON CASCADES.
• A WINTER STORM WARNING IS IN EFFECT FROM 4 PM TODAY UNTIL 4 AM FRIDAY ABOVE 4,000 FT. FOR THE EAST SLOPES OF THE OREGON CASCADES.
• A WINTER STORM WARNING IS IN EFFECT FROM 4 PM TODAY UNTIL 4 AM FRIDAY ABOVE 2,500 FT. FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY.
• A WINTER STORM WARNING IS IN EFFECT UNTIL 4 PM THURSDAY ABOVE 4,000 FT. FOR THE NORTHERN BLUE MOUNTAINS OF OREGON.
• A WINTER STORM WARNING IS IN EFFECT FROM 4 PM TODAY UNTIL UNTIL 4 AM FRIDAY ABOVE 2,500 FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY  AND JOSEPHINE COUNTY, THE EASTERN DOUGHLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM THIS EVENING THROUGH LATE THURSDAY NIGHT FOR THE COAST RANGE OF NORTHWEST OREGON AND THE CENTRAL COAST RANGE OF WESTERN OREGON.
• A HIGH WIND WATCH IS IN EFFECT UNTIL FROM THIS EVENING THROUGH THURSDAY AFTERNOON FOR WALLOWA COUNTY, THE JOHN DAY BASIN, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, AND THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON.
• A HIGH WIND WATCH IS IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING FOR HARNEY COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
• A HIGH WIND WARNING IS IN EFFECT FROM 1 AM THURSDAY UNTIL 4 AM FRIDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• A HIGH WIND WARNING IS IN EFFECT FROM 7 PM TODAY UNTIL 7 AM THURSDAY FOR THE SOUTH CENTRAL OREGON COAST AND AND THE CURRY COUNTY COAST.
• A WIND ADVISORY IS IN EFFECT FROM 10 PM TONIGHT UNTIL 10 AM THURSDAY FOR THE NORTH CENTRAL OREGON COAST AND AND CENTRAL OREGON.

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.

• Cloudy with a good (50%) chance of AM rain, a bit warmer with rain this afternoon (under 0.10 in. of rain possible), rain tonight (0.50 in. of rain possible, snow level 3,000 ft. late tonight) and breezy (Wind: S 15-25 mph),
• Mostly cloudy with AM rain showers and snow and a slight (20%) chance of thunderstorms, rain showers and snow showers and a slight (20%) chance of thunderstorms Thursday afternoon (1.00 in. of rain possible, snow possibly heavy at times), rain showers and snow showers and a slight (20%) chance of thunderstorms (patchy evening blowing snow) at night (0.25 in. of rain possible),
• Mostly cloudy with rain showers and snow showers and a slight (20%) chance of thunderstorms and a bit cooler Friday (patchy AM blowing snow and visibility 0.25 miles or less), then rain showers and snow showers and a slight (20%) chance of thunderstorms Friday night.
• highs 54-44 lows 37-33.
• Mostly cloudy with rain and snow showers Saturday and Saturday night,
• Mostly cloudy with  rain and snow showers and a bit warmer Sunday afternoon, evening rain and snow showers likely (70%), a good (50%) chance of rain and snow showers late at night,
• Mostly cloudy with a good (50%) chance of AM rain and snow, rain and snow likely (70%) and a bit warmer Monday afternoon, rain and snow likely (70%) Monday night,
• Then mostly cloudy with rain and snow likely (70%) Tuesday.
• highs 46-50 lows 33-37. (seasonal average high 56 low 38)

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

• Cloudy and a bit warmer with coastal rain today while cloudy with a good (50%) chance of AM inland rain and inland rain and a bit warmer this afternoon (0.25 in. of rain possible) and breezy (Wind: S 15-25 mph), rain (1.00 in. of rain possible) and windy tonight (Coastal Wind: SW 25-35 mph while inland Wind: SW 25-35 mph decreasing to SW15-25 mph late tonight),
• Mostly cloudy and a bit cooler with coastal showers and a slight (20%) chance of thunderstorms Thursday while AM inland showers and snow and a slight (20%) chance of thunderstorms with showers and inland showers and with a slight (20%) chance of thunderstorms and as bit cooler Thursday afternoon (1.00 in. of rain possible, snow level 1,000 ft. rising to 1,500 ft. in the afternoon), coastal showers and a (30%) chance of thunderstorms while inland snow showers and showers with a slight (20%) chance of inland thunderstorms at night (0.25 in. of rain possible, snow level 1,500 ft.) and breezy (Wind: SW 15-25 mph gusts to 40 mph at night).
• Then mostly cloudy with rain showers and snow showers with a slight (20%) chance of thunderstorms and a bit cooler Friday and Friday night.
• highs 53-45 lows 40-37.
• Mostly cloudy with rain showers and snow showers with a slight (20%) chance of thunderstorms and a bit warmer Saturday and in the evening, rain and snow showers late Saturday night,
• Mostly cloudy with AM rain and snow showers, rain and snow showers likely (70%) and a bit warmer Sunday afternoon and in the evening, rain and snow likely (70%) late at night,
• Mostly cloudy with AM rain and snow likely (70%), rain likely (70%) and a bit warmer Monday afternoon, rain likely (70%) Monday night,
• Then mostly cloudy with rain likely (70%) Tuesday.
• highs 47-52 lows 36-39. (seasonal average high 55 low 41)