We were watching the wind the morning of December 30. The Marshall Fire spread rapidly eventually burning over 1000 homes to the ground.
Compare Wind 2025-12-17
Maren Holecek wrote a poem entitled Ashes and Snow right after the fires. Boulder Valley School District interviewed her and also re-published her poem at the end of January. link 
The Boulder Emergency Operations Center (EOC) has been activated to respond to multiple wildland fires in Boulder County.
NREL 2021-12-30T11:42-0700 today winds are above 60mph.
Today, 2021-12-30, the winds started about 8am and have been growing.
The first fire is north of the City of Boulder. The closest intersection is North Foothills Highway and Middle Fork Road. The name of this fire is the Middle Fork Fire.
The second fire is south of the City of Boulder. The closest intersection is South Cherryvale Road and Marshall Drive. The name of this fire is the Marshall Fire.
40.129321,-105.2844987 N. Foothills & Middle Fork Rd. 39.9550107,-105.2257741 S. Cherryvale Rd & Marshall Dr. 39.9325183,-105.1504254 El Dorado Rd & Imperial Ln
News of evacuations: Channel 7
5pm Evacuation Map. Superior and Louisville, from Marshall Reservoir north to S. Boulder Rd and west to S 104th St.
See also Boulder Wind Captured
7pm Evacuation Map. Superior, Louisville, Broomfield from Marshall Reservoir north to S. Boulder Rd and west through Interlocken and south stopping at Stanley Lake.
YOUTUBE 2d-NnuM2vFQ About 20 homes reported burned to the ground on the south side of El Dorado Rd at Imperial Ln.
39.9325183, -105.1504254 El Dorado Rd & Imperial Ln BOUNDARY 39.9384631, -105.1509190
My brother and his family evacuated safely from this subdivision. The report above says houses north of El Dorado were saved but those on the south side of the street were burned to the ground.
Marshall fire damage assessment 2022-01-06
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Only three months later the NCAR fire proceeded very differently with much lighter wind. See NCAR Fire 2022-03-21