**Strong Storm to arrive tonight, lasting through Thursday. Another colder storm on tap for the weekend! **
49°F – Outlook and Forecast – Abundant moisture ahead of a strong cold front, has given us heavy drizzle and light rain all day at Cascade Shores. As a result, we’ve received .26 of an inch of rain so far and we are still hours away from the storm arriving. Current Nor Cal radar shows the first of many rain bands currently on a line from Mendocino to Red Bluff (See graphic).
A strong jet stream will dive south later tonight and Thursday, ushering in a very potent storm. A classic AR (atmospheric river) event, packing with it abundant moisture and heavy precipitation (foothill rain and Sierra snow). It should arrive here in the foothills sometime after midnight.
Rain/snow will become heavy at times overnight into Thursday, with strong winds, to 25-30 mph with gusts to 40 mph in the foothills, 50-75 mph are winds possible over the Sierra passes, with ridgetop gusts 100-125 to mph. The highest mountain peaks in the Sierra (13,000+ ft) could see gusts up to 150 mph overnight. This storm will have excellent orographics associated with it, which will enhance precip in the foothills and Sierra. Snow accumulations up to 3 ft are possible over the Sierra ridgetops, 1.5 -2 feet of snow over the summits and a foot or more in the Lake Tahoe, Truckee areas. Rainfall amounts in the foothills could total 2.5 to 4 inches by Friday night.
Another strong, colder storm is forecast to impact Nor Cal late Saturday through Sunday with more rain and lower snow levels, down to around 3000 ft by Monday morning in the foothills.
The Forecast: Tonight – Expect cloudy skies in the foothills with light showers, turning heavier in the early morning hours and becoming windy. Thursday – periods of rain, moderate to heavy at times continuing into the evening and overnight hours. Strong winds 25-40+ mph at times may cause downed branches and trees with the risk for isolated power outages. Localized flooding is also possible in low lying areas around the foothills.
Snow levels in the Sierra are currently around 8000 ft, that should lower to around 7000 ft overnight, 6000 ft Thursday morning, lowering further to around 3500-4000 ft Thurs night into Friday. morning with a little wet snow possible in the upper foothills. Little or no accumulation is expected at this time. Another, even colder storm is on tap for Saturday night and Sunday with snow levels dropping to as low as 3000-3500 ft Sunday night, once again flirting with the upper foothill locations.
Winter Storm warnings continue for the Sierra late Wednesday night, lasting through Thursday night for very heavy snow and wind. Poor driving conditions over the Sierra are likely Wednesday night, lasting off and on into the weekend. Travel into the Sierra from Wednesday night on is not recommended.
Extended Outlook – Next week looks cool and mostly cloudy with another, even colder storm possible on tap by the end of next week. Below normal temperatures continuing (See graphic).
Stay tuned to the latest developments and local weather and road conditions right here at Cascade Shores Weather. Stay safe everybody and enjoy your evening!