Baltimore's snow lovers are moping about the moderate-to-strong "La Nina" winter we're entering, with good reason. The National Weather Service looked at all nine such winters from 1950 to 2000 and found no "significant" storms (8 inches or more) at all. El Nino winters in the same period produced eight such storms. La Nina winter snow totals averaged 40 percent below normal. Our best chance for snow (or maybe the best month to leave town)? March. Four of the nine years saw above-average March snow.