On 5/1/18, at 1:35 p.m., National Weather Service issued the following weather advisory for the San Bernardino Mountains.
...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 11 AM PDT WEDNESDAY ABOVE 5500 FEET... * WHAT...Snow expected. Total snow accumulations of 1 to 3 inches, with localized amounts up to 6 inches, are expected. Higher amounts will be in heavier showers. * WHERE...Mountains above 5500 ft. * WHEN...8 PM today to 11 AM Wednesday. * ADDITIONAL DETAILS...Be prepared for slippery road conditions and reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. For road condition information in California...enter 8 0 0 4 2 7 7 6 2 3 if inside california or 9 1 6 4 5 5 7 6 2 3 if outside California.