By Rod Hill on 2021-02-14
NWS has issued an Ice Storm Warning for Portland from 1:00 pm on this Sunday to 6:00 a.m. Monday morning. Mid and upper levels of the atmosphere will see warming as lower levels fueled by a cold east wind, will hold near freezing. Portland and Vancouver will see showery or light precip Sunday afternoon turn to freezing rain or sleet if surface temps warm above 32 degrees.
Sunday evening will see steady hours of moisture arrive and continue through the night. Ground temps 29-32 degrees will be possible which would lead to hours of freezing rain and ice accumulations up to 1/2" by Monday morning. The ice would lead to power outages and downed trees. It is at least possible that temps will warm in some areas into the mid 30s bringing rain.
East winds will finally end Monday, allowing warming temps into the 40s and ending the threat of winter weather.
Rod Hill
ICE STORM WARNING IN PURPLE
WINTER STORM WARNING BEGINS AT NOON ON THIS THURSDAY