February arrives at midnight. It's a leap year, so the month will have 29 days this year. The daylight hours are slowly lengthening, and average high temperatures at BWI rise a bit, from 42 tomorrow to 48 by month's end. Overnight lows climb from 24 to 29. The records range from 83 (Feb. 25, 1930) to minus 7 (Feb. 9, 1934 and Feb. 10, 1899). Five of Baltimore's 10 biggest snowstorms have struck between Feb. 11 and Feb. 19.