Clouds are already camped over Portland this morning, with damp streets, temperatures in the mid-40s and steady rain sliding into the metro on Wednesday, April 1. A strong Pacific frontal system is lined up to deliver periods of rain, gusty south winds and a chance of thunderstorms through the afternoon and evening.
Look for rain through about 5 p.m. today, followed by showers and likely thunderstorms into the evening, with highs near 54°F and new rainfall totals generally between a quarter and a half inch across the metro. South winds will run 8 to 13 mph with gusts up to 26 mph inland and 30 to 40 mph along the coast and exposed ridgelines. Brief downpours and small hail are on the table in the stronger cells. Winter Storm Warnings are in effect for portions of the Cascades through 5 p.m. Thursday, April 2, with significant mountain snow and hazardous travel expected, according to the National Weather Service Portland.
Afternoon Commute And Thunderstorm Risk
Plan on a slower rush hour. Heavier downpours will cut visibility and can lead to ponding in low spots and around clogged drains. Any thunderstorms that pop this afternoon could kick out brief gusty outflow winds up to about 40 mph along with small hail, so give yourself extra time and steer clear of flooded streets where you can.
Cascade Passes And Road Travel
Travel over Santiam and Willamette Passes will turn hazardous as the system cranks up. Snowfall rates may top 1 inch per hour at times and one foot or more of accumulation is possible through Thursday morning. If you have to drive those routes, delay if you can, carry chains or traction tires, and check current road conditions and any restrictions at the Oregon DOT.
Boats, The Coast And The Weekend
Coastal waters stay rough this morning, with a gale window through 11 a.m. Wednesday and very steep seas up to roughly 11 to 13 feet. Mariners and small-craft operators should stay in port or use extreme caution. Showers should ease Thursday as high pressure builds, with drier, sunnier and warmer weather taking over Friday into the weekend. By Saturday, inland highs could reach the upper 60s to near 70°F.
