Weather Underground Forecast for Thursday, December 19, 2013
Active weather will spread across the West on Thursday as a low pressure system slides down the West Coast and pushes moisture onshore from the Pacific Ocean. This system will bring some scattered rain showers to lower elevations of California and Nevada on Thursday, with snow expected across the Sierra Nevadas. The northern Sierras will see 2 to 5 inches of snow, while the southern Sierras may see up to 7 inches of snow above 5,000 feet. Winter weather advisories have been issued as this system will produce dangerous road conditions. Rainfall totals will be heaviest across southern California and into Baja California with some areas possibly seeing up to an inch of rain. Thursday night, into Friday, heavy rainfall associated with this system will advance eastward into Arizona.
Meanwhile, to the east of this activity, snow showers will develop to the east as another trough of low pressure moves over the northern Rockies and Great Basin. Snowfall totals across Montana will range from 4 to 6 inches, with 3 to 5 inches across the northern High Plains of the Dakotas and Nebraska. Thursday night into Friday, snow from this system will move over the upper Midwest and into the Great Lakes region.
In the East, a ridge of high pressure continues to build over the Eastern states, maintaining dry conditions with a warming trend. A few lake effect snow showers may persist for the downwind shores of the Great Lakes.
Temperatures in the Lower 48 states Wednesday have ranged from a morning low of -18 degrees at Crane Lake, Minn. to a high of 78 degrees at Edinburg, Texas