STATION
Deer Flat Dam
GHCND ID
USC00102444
DATE
1921-09-11 · Fall · Day 254 of 1921
TMAX
67°F
TMIN
31°F
TRANGE
36°F
ZONE
canyon_floor
COUNTY
canyon
ELEVATION
765.0m · Canyon Floor
COORDINATES
43.5765°N, -116.7475°W
SOURCE TIER
TIER 1 — PRIMARY FEDERAL SOURCE — NOAA GHCND
CONFIDENCE
0.95
EVENT FLAGSFROST EVENT
SOURCE ORG
NOAA National Centers for Environmental Information — GHCND
RECORD ID
a18bd9fb3f3b4bae
INGESTED
2026-07-14T16:30:54 UTC
PIPELINE
boise-standard-weather-v1.0.0
CONTENT HASH
6a9a416745e42c64
STATION DESC
Lake Lowell / Deer Flat Dam station with records back to 1916 — the oldest station in the dataset. Canyon County floor, water infrastructure context. Records span the full history of modern irrigation agriculture in the Snake River Plain.
RECORD SINCE
1916 — 1921 is year 6 of record
On 1921-09-11 at
Deer Flat Dam
(Canyon Floor, canyon, 765.0m elevation),
the daily high temperature was 67°F
and the daily low was 31°F,
a diurnal range of 36°F.
Season: Fall.
Day 254 of 1921. This date recorded a frost event (tmin ≤ 36°F during growing season).
Source: NOAA National Centers for Environmental Information — GHCND.
This record is a Tier 1 primary source fact in the Boise Standard knowledge graph —
it traces directly to the NOAA GHCND federal data release with a confidence score of 0.95.
Pipeline: boise-standard-weather-v1.0.0.
Record ID: a18bd9fb3f3b4bae.
