In addition to wet weather and possible record-setting cold in the Sacramento Valley and foothills later this week, the Sierra will see snow showers Thursday and into the weekend. With temperatures dipping as low as 25, a rare mid-May snowstorm could affect the northern and central Sierra. In a special weather statement early Monday, National Weather Service’s Reno office warns that snow levels could fall to 6,000 feet by the end of the week. Forecasts for the mountains and foothills also show wind gusts up to 40 mph are possible by midweek, with even stronger winds expected.