People living in western states can expect a sudden and brutal drop in temperature this week - with the National Weather Service (NWS) predicting that Colorado and Wyoming will both see double-digit decreases in warmth.

"Monday through Thursday features spring-like warmth spreading east from the Midwest to most areas along & east of the Mississippi River by mid-week," the agency shared in a Monday Facebook post, accompanied by a map of temperature forecasts.

"In contrast, cooler temps & heavy mountain snow are expected from the West Coast to the northern & central Rockies by mid-week." 

These colder days will follow some initial spring-like warmth, with Colorado's Monday temperature predicted to be in the mid-60s. By Thursday, however, the Rocky Mountain State is projected to return winter weather with a high of 37 degrees.

In Wyoming, the predicted high for Monday is 56 degrees, while Thursday's low will be a below-freezing 31 degrees, according to Newsweek.

Further west, in Idaho and Montana, the coming cold front is expected to be accompanied by a "gusty winds and heavy mountain snow," according to a March 9 tweet from the NWS. The northeast states are also expected to see some snow in high-elevation areas, brought on by a storm in the Canadian Maritimes.