Banner Creek Summit
Banner Creek Summit is a mountain pass in the western United States in central Idaho, at an elevation of 7,037 feet (2,145 m) above sea level. Traversed by State Highway 21, the Ponderosa Pine Scenic Byway, it is located on the border of Custer County and Boise County, also the border of the Challis and Boise National Forests, immediately northwest of the Sawtooth Range.
Banner Creek Summit also marks the divide between the Salmon River and Payette River drainage areas. The highway follows Banner Creek, a tributary of the Middle Fork of the Salmon River, on the north side of the summit, and Canyon Creek (South Fork - Payette River) on the south side.
In road distance, the summit is about midway between Stanley and Lowman. This section of SH-21 is usually not maintained during the winter months, due to light traffic and heavy snowfall.
Climate
| Climate data for Banner Summit, Idaho, 1991–2020 normals: 7040ft (2146m) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °F (°C) | 33.2 (0.7) |
37.7 (3.2) |
44.2 (6.8) |
49.3 (9.6) |
57.1 (13.9) |
64.1 (17.8) |
75.9 (24.4) |
75.2 (24.0) |
66.2 (19.0) |
51.9 (11.1) |
38.5 (3.6) |
30.4 (−0.9) |
52.0 (11.1) |
| Daily mean °F (°C) | 22.2 (−5.4) |
24.7 (−4.1) |
30.2 (−1.0) |
35.4 (1.9) |
43.2 (6.2) |
49.5 (9.7) |
58.7 (14.8) |
57.8 (14.3) |
50.3 (10.2) |
39.1 (3.9) |
27.6 (−2.4) |
20.4 (−6.4) |
38.3 (3.5) |
| Mean daily minimum °F (°C) | 11.1 (−11.6) |
11.7 (−11.3) |
16.1 (−8.8) |
21.5 (−5.8) |
29.2 (−1.6) |
34.9 (1.6) |
41.4 (5.2) |
40.3 (4.6) |
34.2 (1.2) |
26.3 (−3.2) |
16.7 (−8.5) |
10.3 (−12.1) |
24.5 (−4.2) |
| Average precipitation inches (mm) | 5.65 (144) |
4.60 (117) |
5.07 (129) |
3.76 (96) |
2.76 (70) |
2.38 (60) |
0.73 (19) |
0.75 (19) |
1.39 (35) |
2.74 (70) |
4.84 (123) |
6.72 (171) |
41.39 (1,053) |
| Source 1: XMACIS2 | |||||||||||||
| Source 2: NOAA (Precipitation) | |||||||||||||
References
- ^ "Banner Creek Summit". Idaho Transportation Department. Archived from the original on December 26, 2014. Retrieved January 14, 2013.
- ^ "National Elevation Dataset". USGS. Retrieved January 14, 2013.
- ^ Banner Summit (Map). 1:24000. USGS 7.5'. USGS. 1972.
- ^ "xmACIS2". National Oceanic and Atmospheric Administration. Retrieved November 24, 2023.
- ^ "Banner Summit, Idaho 1991-2020 Monthly Normals". Retrieved November 24, 2023.
External links
- Idaho Byways - Ponderosa Pine Scenic Byway
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