KGO-TV last weekend became the second broadcaster to begin offering its local news in HD in the San Francisco market, the nation's fifth largest (following KTVU-TV, the Fox affiliate in nearby Oakland).

The NBC affiliate said it was the first in the Louisville market to expand HD beyond its primetime programming, and its national news content from NBC News, to its local newscasts.

Despite its national standing with many viewers via cable, the Tribune station was the third broadcaster in the market to make the HD leap, following last year’s switchover by ABC affiliate WLS-TV, and NBC outlet WMAQ-TV’s move earlier this year.

WCVB-TV in Boston this week became the first broadcaster in the market to transition its local news to HD, as the number of local stations transmitting 1080i or 720p grows toward an estimated 50 outlets nationwide.

KRNV-TV in Reno, Nev., became the first broadcaster in Northern Nevada to begin airing local news in HD last week. The station, a property of Sunbelt Communications, plans to broadcast all of its newscasts--and some of its public affairs staples such as "Nevada NewsMakers"--in 1080i, according to the Reno Gazette-Jo

Two more TV stations have joined the growing list of stations offering local news in high definition. KTVK Phoenix, a Belo station, and Cordillera’s NBC affiliate WLEX in Lexington this week began to broadcast newscasts in HD. Neither station is the first in its respective market to make the upgrade. KPNX, Gannett’s