June 26, 2012 Lowest daily average: on January 11, 1963 Highest 24-hour precipitation: on May 22, 1876. Highest monthly precipitation: during May 1876 Lowest monthly precipitation: none during December 1881; trace monthly precipitation has occurred several times, the last being November 1949. Highest annual precipitation: during 1967 Lowest annual precipitation: during 2002 Highest 24-hour snowfall: on December 24, 1982 Highest one-storm total: from December 1−6, 1913. Highest daily snow depth (since 1921): November 4−5, 1946 Highest monthly snowfall: during December 1913 Highest seasonal snowfall: during 1908−09 Lowest seasonal snowfall: during 1888−89 Neighborhoods Denver has 79 neighborhoods that the City and community groups use for planning and administration. Although the City's delineation of the neighborhood boundaries is somewhat arbitrary, the City's definitions of its neighborhoods roughly correspond to those used by residents. Denver also has a number of neighborhoods not reflected in the City's administrative neighborhoods. Sometimes these neighborhoods reflect the way people in an area identify themselves; sometimes they reflect how others, such as real estate developers, have defined those areas. Among the neighborhoods commonly spoken of are historic and trendy LoDo (short for "Lower Downtown"), part of the City's Union Station neighborhood; Capitol Hill, Washington Park; Uptown, part of the North Capitol Hill neighborhood; Curtis Park, part of the Five Points neighborhood; Alamo Placita, the northern part of the Speer neighborhood; and the Golden Triangle, roughly the Civic Center neighborhood. Transportation Grid system Most of Denver has a straightforward street grid oriented to the four cardinal directions. Blocks are usually identified in hundreds from the median streets, identified as "0", which are Broadway (the west-east median) and Ellsworth Avenue (the north-south median). Colfax Avenue, the major east-west artery through Denver, is 15 blocks (1500 North) of the median. Avenues north of Ellsworth are numbered (except for Colfax Avenue and a few others), while avenues south of Ellsworth are named. There is also an older downtown grid system that was designed to be parallel to the confluence of the South Platte River and Cherry Creek. Most of the streets downtown and in LoDo run northeast-southwest and northwest-southeast. This system has an unplanned benefit for snow removal; if the streets were in a normal N-S/E-W grid, only the N-S streets would get sun. With the grid pointed in diagonal directions, the NW-SE streets get the sun to melt snow in the morning and the NE-SW streets get it in the afternoon.