Pasture NSC monitor

Hockinson, WA (45.7243°N, 122.5184°W) — non-structural carbohydrate prediction

Fetching weather from NWS...
Current NSC
% dry matter
Risk level
Today peak
% DM
Safe window
lowest NSC time
24-hour NSC forecast
Safe (<10% NSC) Caution (10–15%) Avoid (>15%)
Loading...
7-day overview — click a day for hourly detail
Safe day Caution day Avoid peak
Loading...
7-day NSC trend
NSC trend — next 24 hours
NSC % DM  Caution threshold
Grass mix

Default: PNW dairy pasture. Update when you identify your actual seed mix.


Alert thresholds

SMS alerts via Twilio

Sign up at twilio.com for a free account. Alerts fire automatically when NSC crosses your thresholds.


About the NSC model

NSC (non-structural carbohydrates) accumulate in pasture grass under conditions that slow plant growth while photosynthesis continues. This model applies research-based modifiers to a grass-mix baseline: diurnal curve (peaks ~2–4pm, lowest pre-dawn), temperature stress (cool nights + sunny days = high NSC), overnight low near-frost risk, cloud cover vs. sun, and precipitation dilution. Thresholds: <10% NSC generally safe for metabolic horses; 10–15% use caution; >15% avoid grazing. This is a management aid — not a substitute for pasture testing.