By 5:40 a.m. Wednesday, April 15, Portland was already in full drizzle mode, with light rain, patchy fog and temperatures hovering near 43°F. Visibility is down in low-lying spots and on bridges, so expect wet pavement and slower commutes early. Leave extra stopping distance and keep an eye out for slick bike lanes.
The steady morning rain is expected to break up into more hit-or-miss showers later, with a high near 52°F. Showers and scattered thunderstorms are likely from late morning into early evening, and gusts could push into the low 20s, up to about 22 mph. Any stronger storm could briefly unload heavy rain and small hail or graupel. According to the National Weather Service in Portland, the prime window for storms runs roughly 11 a.m. to 7 p.m., with chances dropping after sunset.
Afternoon Thunder Risk
Thunderstorms this afternoon will be scattered, but when they pop up they can pack a quick punch. Expect lightning, brief heavy downpours and gusty outflow winds where cells develop. Those bursts can rapidly cut visibility and create standing water on streets, so take it easy through crosswalks and intersections.
Cascade Travel And Marine
If you are heading into the Cascades, plan for winter-like travel. Snow levels could fall to around 1,500 to 2,000 feet, with heavier precipitation at pass level and a Winter Storm Warning in effect through early Thursday morning. Check road and pass conditions at TripCheck before you drive, since chains or traction tires may be required at higher elevations. Out on the water, boaters should brace for gusty northwest winds and seas building to around 9 to 12 feet tonight, with Small Craft Advisories posted for coastal waters.
Frost Risk Overnight
Late tonight, skies clear out and winds relax, which will let temperatures slide into the mid-30s across many lowland neighborhoods. Frost Advisories are up for interior spots, with a Freeze Watch for the Upper Hood River Valley. Gardeners will want to protect tender plants ahead of a crisp start to Thursday morning…