Warmer conditions could turn chilly and rainy — and potentially even snowy — by the end of the week for San Diego County, forecasters said. A storm system churning near Alaska could bring San Diego County some rain and potentially snow to elevations above 4,000 feet as it moves south by the weekend, NBC 7’s team of meteorologists forecasted. The first chance for some scattered showers is Thursday night into Friday, but chances for rain increase Friday morning, NBC 7 Meteorologist Greg Bledsoe said. Light showers could continue off and on through Saturday. Here’s how much rain we could get from this storm system: COAST: Near 0.20’’ VALLEYS: 0.20’’-0.40’’ MOUNTAINS: 0.50’’-1’’ DESERTS: 0.01’-0.10’’ “We may not get a lot of rain, but we’ll definitely see much cooler air move in,” Bledsoe said. The system could send temperatures plummeting 10 to 20 degrees below Thursday’s high temperatures, Bledsoe said. That would put temperatures into the 60s for the valleys and 40s for the mountains — where overnight lows could be near freezing. Overnight lows elsewhere are expected to be in the 20s, 30s and 40s. Mornin', SoCal peeps 👋 The motion above the ocean paints a picture of clouds moving SE out at sea and NE onto the West Coast, indicating a trough of low pressure. Nice today, but ready for Friday? 👇 #CAwx ✅ Highs 10°-20° cooler ✅ Breezy winds ✅ Light showers/mtn snow? 🤔 pic.twitter.com/IVT8umeG2v — NWS San Diego (@NWSSanDiego) November 14, 2024 “This is a cold system that will bring our temperatures down significantly,” NBC 7’s Brooke Martell said. “That means there is a chance we could get some snow with this storm.” Snowfall could reach one to two feet in mountain ranges between 4,000 to 5,000 feet. Winds will also pick up with this storm, forecasters say. Wind gusts could reach 25 mph at the coast and 35-45 mph in the mountains and deserts. Ahead of the storm, the week started with a slight warm-up and sunny and windy conditions. Morning temperatures started to shift cooler as the storm approached.