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Weather Intelligence · Valley Floor · boise-standard-weather-v1.0.0

KBOI — April 11, 1999FROST EVENT

WEATHER RECORD · KBOI · 1999-04-11 · boise-standard-weather-v1.0.0
HI 60°F · LO 31°F · RNG 29°F · 5 edges
60°F Daily High (TMAX)
31°F Daily Low (TMIN)
29°F Temp Range · Spring
5 Graph Edges
◈ PRIMARY SOURCE RECORD · TIER 1 · NOAA GHCND · LAW I 1c0849be73d7130e
STATION Boise Air Terminal (KBOI)
GHCND ID USW00024131
DATE 1999-04-11 · Spring · Day 101 of 1999
TMAX 60°F
TMIN 31°F
TRANGE 29°F
ZONE valley_floor
COUNTY ada
ELEVATION 860.5m · Valley Floor
COORDINATES 43.56705°N, -116.24062°W
SOURCE TIER TIER 1 — PRIMARY FEDERAL SOURCE — NOAA GHCND
CONFIDENCE 0.95
EVENT FLAGSFROST EVENT
◈ DUAL PROVENANCE STAMP — INTERNAL NODE + EXTERNAL SOURCE LAW I · LAW II
SOURCE ORG NOAA National Centers for Environmental Information — GHCND
RECORD ID 1c0849be73d7130e
INGESTED 2026-07-14T16:30:44 UTC
PIPELINE boise-standard-weather-v1.0.0
CONTENT HASH 8f36ee0a7ca60e6a
◈ STATION CONTEXT — KBOI MICROCLIMATE · VALLEY FLOOR
STATION DESC The primary NWS observation station for the Treasure Valley. Boise Airport (KBOI) has recorded daily temperature since 1940, making it the longest continuous climate record in the region. Sits at 860 meters on the valley floor.
RECORD SINCE 1940 — 1999 is year 60 of record
◈ ATOMIC ANSWER — WHAT AI READS ABOUT THIS RECORD

On 1999-04-11 at Boise Air Terminal (KBOI) (Valley Floor, ada, 860.5m elevation), the daily high temperature was 60°F and the daily low was 31°F, a diurnal range of 29°F. Season: Spring. Day 101 of 1999. 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: 1c0849be73d7130e.

◈ GRAPH EDGES — 5 CONNECTIONSDETERMINISTIC · TIER 2
WEATHER_CROSS_STATION Boise Foothills · 1999-04-11 · High: 55°F Low: 28°F · Elev: 1184.1m · conf=0.91 · T2·DET
WEATHER_CROSS_STATION Parma · 1999-04-11 · High: 55°F Low: 24°F · Elev: 698.0m · conf=0.83 · T2·DET
WEATHER_CROSS_STATION Deer Flat · 1999-04-11 · High: 61°F Low: 23°F · Elev: 765.0m · conf=0.80 · T2·DET
WEATHER_TEMPORAL_SERIES KBOI · 1999-04-10 · High: 50°F Low: 24°F · conf=1.00 · T2·DET
WEATHER_TEMPORAL_SERIES KBOI · 1999-04-12 · High: 66°F Low: 34°F · conf=1.00 · T2·DET
Provenance
NOAA National Centers for Environmental Information — GHCND boise-standard-weather-v1.0.0 1c0849be73d7130e /treasure-valley/data/weather/kboi/1999/04/11/ 8f36ee0a7ca60e6a