Tracking Atmospheric River for the West Coast; Space Weather Storming Continues

An atmospheric river will bring threats of gusty to high winds and heavy rainfall to California mainly Thursday into Saturday which may bring areas of flooding and wind damage. Heavy snow will be possible over the Sierra Nevada mountains Thursday into Friday associated with the atmospheric river. Minor to severe geomagnetic storming (space weather) is expected to continue into early Thursday. Read More >

Snowfall composite maps stratified by 925 mb ALB wind direction and speed.

Based on advisory and warning level events from the 2013 - 2017 winter seasons.

925 mb:

0-90 degrees, 0-19 kt	0-90 degrees, 20-39 kt	0-90 degrees, 40+ kt
90-180 degrees, 0-19 kt	90-180 degrees, 20-39 kt	90-180 degrees, 40+ kt
180-270 degrees, 0-19 kt	180-270 degrees, 20-39 kt	180-270 degrees, 40+ kt
270-360 degrees, 0-19 kt	270-360 degrees, 20-39 kt	No events in the 270-360 degrees, 40+ kt category