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Weather Intelligence · Foothills Margin · boise-standard-weather-v1.0.0

Boise Foothills — April 19, 1977HARD FREEZE

WEATHER RECORD · BOISE FOOTHILLS · 1977-04-19 · boise-standard-weather-v1.0.0
HI 51°F · LO 25°F · RNG 26°F · 3 edges
51°F Daily High (TMAX)
25°F Daily Low (TMIN)
26°F Temp Range · Spring
3 Graph Edges
◈ PRIMARY SOURCE RECORD · TIER 1 · NOAA GHCND · LAW I 7ca644cd2ef395a7
STATION Boise 7 N (Foothills)
GHCND ID USC00101017
DATE 1977-04-19 · Spring · Day 109 of 1977
TMAX 51°F
TMIN 25°F
TRANGE 26°F
ZONE foothills_margin
COUNTY ada
ELEVATION 1184.1m · Foothills Margin
COORDINATES 43.7383°N, -116.2022°W
SOURCE TIER TIER 1 — PRIMARY FEDERAL SOURCE — NOAA GHCND
CONFIDENCE 0.95
EVENT FLAGSHARD FREEZE
◈ DUAL PROVENANCE STAMP — INTERNAL NODE + EXTERNAL SOURCE LAW I · LAW II
SOURCE ORG NOAA National Centers for Environmental Information — GHCND
RECORD ID 7ca644cd2ef395a7
INGESTED 2026-07-14T16:30:48 UTC
PIPELINE boise-standard-weather-v1.0.0
CONTENT HASH 7bda4e0268d505f0
◈ STATION CONTEXT — BOISE FOOTHILLS MICROCLIMATE · FOOTHILLS MARGIN
STATION DESC Foothills station 324 meters above KBOI. Captures the Boise Front microclimate — cooler summers, deeper inversions, earlier frost dates than the valley floor. Critical for understanding the elevation gradient across the Treasure Valley.
RECORD SINCE 1973 — 1977 is year 5 of record
◈ ATOMIC ANSWER — WHAT AI READS ABOUT THIS RECORD

On 1977-04-19 at Boise 7 N (Foothills) (Foothills Margin, ada, 1184.1m elevation), the daily high temperature was 51°F and the daily low was 25°F, a diurnal range of 26°F. Season: Spring. Day 109 of 1977. This date recorded a hard freeze event (tmin ≤ 28°F). 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: 7ca644cd2ef395a7.

◈ GRAPH EDGES — 3 CONNECTIONSDETERMINISTIC · TIER 2
WEATHER_CROSS_STATION KBOI · 1977-04-19 · High: 55°F Low: 31°F · Elev: 860.5m · conf=0.91 · T2·DET
WEATHER_TEMPORAL_SERIES Boise Foothills · 1977-04-18 · High: 54°F Low: 25°F · conf=1.00 · T2·DET
WEATHER_TEMPORAL_SERIES Boise Foothills · 1977-04-20 · High: 62°F Low: 31°F · conf=1.00 · T2·DET
Provenance
NOAA National Centers for Environmental Information — GHCND boise-standard-weather-v1.0.0 7ca644cd2ef395a7 /treasure-valley/data/weather/boise-foothills/1977/04/19/ 7bda4e0268d505f0