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Thirty-Four years ago, January 7th AND February 8. 1989, was the last time it snowed in the San Fernando Valley. Rare snow dusts Southern California - UPI Archives. Easily visible to all of the Valley, the snow fell primarily across Oat Mountain above the 118, which was not developed to the extent it is now. But residents across the Valley as far south as Chatsworth Street enjoyed the rare event.
A similar event is predicted by weather media, but may be deterred with the denser vegetation, specifically arbors or trees across the landscape of the thousands of homes built since 1989 above the 118 freeway. That vegetation may present some upward heat transforming the falling flakes which could partially melt, and as they continue downward to cold air again, will refreeze into a tiny ice pellet - hail.
If you are holding your breath for a nearby site with the dust of white based on elevation, the National Geographical Center website provides the means for you to discover the elevation based on a latitude/longitude co-ordinates.
NOTE: These co-ordinates are in the order of Longtitude & Latitude the NGC will ask for Latitude & Longitude.
Get the coordinates of a place
To format your coordinates so they work in Google Maps, use decimal degrees in the following format: