Heavy snow and multiple spinouts Thursday morning had officials holding all traffic on Interstate 80 at the California and Nevada state line in the Sierra as a Winter Storm Warning went into effect.

A winter storm warning was issued by the NWS Reno NV on Thursday at 2:21 p.m. in effect until Friday at noon for Mono County.

What's the difference between a winter storm watch, an advisory and a warning? And can they mean different things for different parts of Indiana?

This storm is expected to significantly impact travel, infrastructure, and public safety across Big Sky Country..

An updated winter storm warning was issued by the National Weather Service on Thursday at 3:45 a.m. valid from 10 a.m. until Friday 10 a.m. for Klamath Basin.

As a second atmospheric river takes aim at Northern California, the Sacramento office of the National Weather Service issued a Winter Storm Warning for Monday through Wednesday

Meanwhile, a swath of the Central and Eastern U.S. was under winter weather advisory, which the NWS issues "for any amount of freezing rain, or when 2 to 4 inches of snow (alone or in combination with sleet and freezing rain), is expected to cause a significant inconvenience, but not serious enough to warrant a warning."

On Wednesday at 2:48 p.m. a winter storm warning was issued by the NWS Medford OR valid from Thursday 4 p.m. until Friday 10 a.m. The warning is for Central Siskiyou County and Northeast Siskiyou and Northwest Modoc counties as well as Modoc County.