when will the cold snap end?

In looking ahead at the AccuWeather forecast, I see that things ought to warm up significantly by Tuesday next week, and temperatures will waver back and forth between the 30s and 40s (Fahrenheit) thereafter. The first half of February looks to be about the same, and the latter half of February will move firmly into the 40s—very cool, but not freezing cold by my standards. March will, of course, come in like a lion and go out like a lamb, starting off cool/cold and becoming more moderate. I'd call mid-March the definite beginning of spring.