PORTLAND, Ore. ( KOIN ) — A minor to moderate atmospheric river is expected to soak the Portland, Vancouver area for the final weekend of October.
Rain showers will appear Saturday morning, but the heaviest of the wet weather is still to come. Scattered rain showers will continue Saturday with the heaviest of the rain falling before sunrise Sunday.
Rain timeline along the Willamette Valley
Scattered rain showers could be heavy at times throughout the day on Saturday. This comes as the atmospheric river keeps mild temperatures across the Portland, Vancouver area. Afternoon highs will likely stay in the mid-60s despite overcast skies and rainy conditions.
Rain showers will be widespread and at the highest rainfall rates early Sunday morning. Those persistent and soaking rains will slowly slightly during the afternoon hours on Sunday. The rain potential remains on Sunday with a few dry breaks throughout the day.
Mild temperatures will remain Sunday with highs warming into the low-60s around Portland. The cooler weather pattern doesn’t start taking shape until next week.
Rain accumulation this weekend
Soaking rains will help fill Portland area rain gauges quickly this weekend. Nearly three-quarters of an inch to a full inch of rain is possible Sunday through Saturday along the Willamette Valley. Some localized flooding is possible during the heaviest moments of rain.
This weekend’s wet weather will help shrink Portland’s rain deficit for the month of October. On average, the monthly rainfall total should sit close to 3.42″ of rain by Halloween…