Winter Weather Advisory issued December 16 at 11:55PM MST until December 17 at 5:00PM MST by NWS Riverton WY

* WHAT…Snow expected. Additional snow accumulations up to 6 inches
for southwestern portions of the park with 2 to 4 inches near Old
Faithful, and up to 2 inches from Mammoth to Tower Junction.

* WHERE…Yellowstone National Park.

* WHEN…Until 5 PM MST Tuesday.

* IMPACTS…Travel could be very difficult. The hazardous conditions
could impact the Tuesday morning commute.