School officials said on Friday that this would give students enough time to safely return to campus.
The school also said a large portion of students at the Pullman campus are from Western Washington.
The first day of spring semester was scheduled for Monday, Jan. 10.
Cross-state passes closed early Thursday morning due to hazardous road conditions, and transportation officials said they would be closed until possibly Sunday.
All WSU-Pullman facilities and operations will be open normal business hours on Monday and Tuesday, weather permitting.
Other WSU campuses are expected to start classes on time Monday morning, weather permitting.
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