Mostly sunny today with a high of 56. Looks like it could be windy at times. Mother Nature did not get the “Spring” memo. A mixture of rain and snow will be developing after midnight. On the agenda today: the Landmarks Preservation Commission considers protecting several buildings on the Lower East Side. Community Board 3 holds its full board meeting. Expect more chatter about the future of 180 Orchard, the neighborhood’s most reviled stalled building. And several LES-centric events tied to this week’s 100th anniversary of the Triangle Shirtsleeve fire get underway. We’ll have a preview. For more events be sure to have a look at our Calendar.