The National Weather Service issued a winter warning on Sunday, saying the possibility of snowfall to the bottom of the valley on Monday morning was increasing. The counseling ends at 10 am on Monday. Snow in tracks or up to an inch is possible, with muddy conditions on the roads, the forecast says. It also requires 3 to 6 inches of snow possible at altitudes above 500 feet. Council Crest is located about 1,000 feet above sea level. the Sylvan US 26 elevator is approximately 750 feet. The Willamette Valley, southwestern Washington and the north coast of Oregon could see a mixture of rainfall with little snow accumulating along the coast. But motorists should be prepared on Monday, the meteorological service said. “Because this is April and this could, emphasis on could, turn into an unprecedented snowfall. Those who drive during the movement early on Monday morning should be careful,” meteorologists said. The forecast speaks of unusually cool weather for the week. Portlanders can expect rain and wind later Monday. The highs will remain in the mid to high 40s until Thursday, according to meteorologists. The Portland Bureau of Transportation is preparing for “whatever snow / mud / rain mix we have” during Monday morning commute, the agency wrote on Twitter. His crews work all night in higher-altitude areas around Portland to prepare for rain. “Road temperatures are not expected to freeze, so we do not expect much snow to get stuck, but we could see some accumulated mud, so we ask people to do it very late and carefully in the morning,” she said. of PBOT, Hannah Schafer. in an email on Sunday night. The Oregon Department of Transportation’s trucks are ready to start if needed, said spokesman Don Hamilton. The freezer is made of magnesium chloride with a rust inhibitor, Hamilton said, so the trucks can be used before snow or ice, but not while it is raining because then the chemicals will be washed off the roads. “We are monitoring the situation very closely overnight and we have crews all over Portland ready to leave at 4am for anything to happen,” Hamilton said.