A winter storm warning is in effect for the East Slopes of the Oregon Cascades until 5 AM PDT Thursday. The forecast includes heavy snow accumulations of 4 to 8 inches above 4000 feet, with the possibility of even greater amounts along the Cascade crest. Strong winds, with gusts reaching up to 45 mph, are also anticipated, leading to dangerous conditions, especially at higher elevations. Lighter snowfall is expected below 4000 feet along major routes such as US 97, US 26, and US 20. Motorists are advised to drive with caution due to reduced visibility and slippery roads. The steady snowfall from earlier today is forecast to turn into snow showers by the afternoon.