May 16, 2026

{"conditions":{"outdoor_temp_peak_f":82.0,"outdoor_rh_min_pct":13.0,"solar_peak_w_m2":835.0,"cloud_cover_avg_pct":74.0,"notes":"Sunset after severe hot-dry day: daily score 61.5, both-axis compliance 65.4%, heat and VPD-high each 5.08h, no VPD-low, dp_margin_min 5.6F. Current greenhouse is 67.8F, VPD 0.79 kPa, RH 67%, dew margin 11.4F, mode VENTILATE. Overnight remains dry outside but mild, then Saturday has another dry solar ramp to 82F, 13-14% RH and 835 W/m2 solar."},"stress_windows":[{"kind":"vpd_high","start":"2026-05-15T20:15:00-06:00","end":"2026-05-15T22:30:00-06:00","severity":"medium","mitigation":"short recovery shoulder: engage 1.00, all 1.20, 35s gap, 45/90s delays, fog_escalation 0.50 while fog is blocked; keep 180s sealed cap"},{"kind":"vpd_low","start":"2026-05-15T22:30:00-06:00","end":"2026-05-16T03:00:00-06:00","severity":"low","mitigation":"strong overnight unwind: engage 1.45, all 1.85, 55s gap, fog_escalation 0.90, vpd_hysteresis 0.50, 120/240s mist delays"},{"kind":"vpd_high","start":"2026-05-16T03:00:00-06:00","end":"2026-05-16T08:30:00-06:00","severity":"medium","mitigation":"dry pre-dawn guard: gradually lower engage/all thresholds and gap only if outdoor dry air starts pulling indoor VPD up; avoid peak-day aggression until morning ramp"},{"kind":"vpd_high","start":"2026-05-16T08:30:00-06:00","end":"2026-05-16T12:00:00-06:00","severity":"high","mitigation":"missed-sunrise fallback for Saturday dry ramp: engage 0.90, all 1.05, 20s gap, fog_escalation 0.20, vpd_watch 30s, bias_cool -1.5, d_cool_stage_2 2.0"}],"rationale":[{"parameter":"mister_engage_kpa","old_value":1.00,"new_value":1.45,"forecast_anchor":"Current VPD has recovered to 0.79 kPa near vpd_high 0.82 with dew margin 11.4F; lesson 105 warns to unwind overnight after aggressive dry-day support.","expected_effect":"prevent VPD-low and reduce water after 22:30 while keeping short evening recovery available first."},{"parameter":"mister_all_kpa","old_value":1.20,"new_value":1.85,"forecast_anchor":"No active VPD-high at sunset and fog is time-window blocked; all-zone escalation should not remain near daytime guardrail values overnight.","expected_effect":"avoid expensive all-zone rotation overnight unless VPD rises materially."},{"parameter":"mister_pulse_gap_s","old_value":30.0,"new_value":55.0,"forecast_anchor":"Night air holds humidity better and today's mister budget was fully spent at 600 gal.","expected_effect":"cut overnight water use without increasing dew risk or VPD-low."},{"parameter":"fog_escalation_kpa","old_value":0.60,"new_value":0.90,"forecast_anchor":"Fog is blocked after 17:00 and current VPD is recovered; high escalation prevents stale aggressive fog posture if a fallback persists.","expected_effect":"avoid unnecessary fog/humidity overshoot overnight; lower again only for Saturday morning dry ramp."},{"parameter":"min_fog_off_s","old_value":90.0,"new_value":120.0,"forecast_anchor":"Current dew margin safe but water/cost penalty is high and fog is unavailable overnight.","expected_effect":"keep overnight fog conservative and avoid carryover if firmware window reopens before sunrise plan lands."},{"parameter":"mister_engage_delay_s","old_value":45.0,"new_value":120.0,"forecast_anchor":"Overnight humidity recovery is already achieved; short delays are only needed during active VPD-high VENTILATE stress.","expected_effect":"reduce false starts and water use in stable overnight air."},{"parameter":"mister_all_delay_s","old_value":90.0,"new_value":240.0,"forecast_anchor":"All-zone rotation is costly and not needed while indoor VPD is near band.","expected_effect":"reserve all-zone pulses for sustained VPD rise rather than transient dryness."},{"parameter":"bias_cool","old_value":0.5,"new_value":3.5,"forecast_anchor":"Mild night still has heater potential against crop low band; validated lessons use +2 to +4 to prevent heater-to-vent oscillation.","expected_effect":"avoid post-heating vent dumps and reduce cold stress/chatter."},{"parameter":"bias_heat","old_value":0.0,"new_value":0.5,"forecast_anchor":"Outdoor forecast stays 58-63F, not a cold night; only modest warmth is needed to protect dew margin.","expected_effect":"maintain dew margin without chasing expensive heating."},{"parameter":"vpd_hysteresis","old_value":0.40,"new_value":0.50,"forecast_anchor":"VPD has recovered and the evening objective shifts from recovery to avoiding oscillation and VPD-low.","expected_effect":"reduce short-cycle misting overnight."},{"parameter":"vpd_watch_dwell_s","old_value":45.0,"new_value":75.0,"forecast_anchor":"No active high-VPD stress after recovery; short watch dwell is for confirmed dry ramp.","expected_effect":"avoid reseal loops overnight, then return to 30s for morning fallback."},{"parameter":"mist_backoff_s","old_value":700.0,"new_value":900.0,"forecast_anchor":"Sealed attempts should be less frequent overnight after costly daytime water use.","expected_effect":"space recovery attempts and protect water budget."},{"parameter":"mister_vpd_weight","old_value":2.5,"new_value":2.0,"forecast_anchor":"Zone spread is modest at sunset and peak-day driest-zone weighting is no longer necessary overnight.","expected_effect":"reduce aggressive targeted water spend until live morning ramp."},{"parameter":"d_cool_stage_2","old_value":2.5,"new_value":2.0,"forecast_anchor":"Saturday forecast reaches 82F with RH 13-14% and solar up to 835 W/m2; fallback should not wait too long for fan2.","expected_effect":"pre-stage full ventilation if sunrise cycle misses and dry ramp arrives."}]}

{"conditions":{"outdoor_temp_peak_f":79.0,"outdoor_rh_min_pct":17.0,"solar_peak_w_m2":834.0,"cloud_cover_avg_pct":69.0,"notes":"Humid dawn with indoor VPD 0.36 kPa and dew margin 5.6F, then a dry ramp: outdoor RH falls below 25% by 11:00 and reaches 17-20% from noon through evening. Solar is strongest 10:00-12:00, peaking near 834 W/m2, then clouds increase but dry air persists."},"stress_windows":[{"kind":"vpd_low","start":"2026-05-16T05:50:00-06:00","end":"2026-05-16T08:30:00-06:00","severity":"low","mitigation":"guard humid dawn with moderate thresholds, 45s gaps, conservative fog escalation, and no pre-ramp peak-day misting until live/outdoor dryness confirms"},{"kind":"vpd_high","start":"2026-05-16T09:30:00-06:00","end":"2026-05-16T18:30:00-06:00","severity":"high","mitigation":"band-coupled mist thresholds near active vpd_high, 30-60s delays, 15-25s peak gaps, fog_escalation 0.15-0.25 during the firmware fog window, and vpd_watch 30-45s"},{"kind":"heat","start":"2026-05-16T11:00:00-06:00","end":"2026-05-16T16:00:00-06:00","severity":"medium","mitigation":"bias_cool -1.0 to -1.5, d_cool_stage_2 2.0, summer vent gate on, dwell gate on, and mist_max_closed_vent_s capped at 180s so THERMAL_RELIEF can flush heat"},{"kind":"vpd_high","start":"2026-05-16T18:30:00-06:00","end":"2026-05-16T22:30:00-06:00","severity":"medium","mitigation":"short dry-evening recovery shoulder with engage 1.10/all 1.35/gap 35 while outdoor VPD remains high, then unwind by 22:30 to avoid VPD-low overnight"}],"rationale":[{"parameter":"mister_engage_kpa","old_value":1.10,"new_value":0.88,"forecast_anchor":"noon forecast 79F, RH 17%, solar 834 W/m2; recent vpd_high_moisture_guardrail clamps pulled conservative requests toward band-coupled values","expected_effect":"reduce VPD-high during the dry solar pulse without pre-misting the humid dawn"},{"parameter":"mister_all_kpa","old_value":1.35,"new_value":1.05,"forecast_anchor":"active vpd_high about 0.83; guardrail recommends all-zone near vpd_high+0.25 during VPD-high/VENTILATE stress","expected_effect":"make all-zone assist available during peak dry stress while still unwinding after solar decline"},{"parameter":"mister_pulse_gap_s","old_value":35.0,"new_value":15.0,"forecast_anchor":"RH below 20% from noon through late afternoon with high solar at noon; validated dry-day lessons recommend 15-25s gaps in this window","expected_effect":"speed VPD recovery during the steepest dry ramp while limiting that cadence to the peak"},{"parameter":"fog_escalation_kpa","old_value":0.45,"new_value":0.15,"forecast_anchor":"PR-A makes VENTILATE fog the high-leverage tool for hot-dry stress; today has a short but real noon solar/dry pulse","expected_effect":"use fog earlier during the firmware window for stubborn VPD-high instead of extending sealed mist"},{"parameter":"min_fog_off_s","old_value":75.0,"new_value":45.0,"forecast_anchor":"recent guardrail clamps shortened fog-off dwell during live VPD-high stress and dew margin is above 5F","expected_effect":"allow timely fog cycling only during the confirmed dry peak"},{"parameter":"bias_cool","old_value":2.0,"new_value":-1.5,"forecast_anchor":"forecast reaches 79F with 728-834 W/m2 around 11:00-12:00; heat stress dominated yesterday","expected_effect":"start cooling/fan support earlier during peak solar without carrying cold-night anti-chatter into daytime"},{"parameter":"vpd_watch_dwell_s","old_value":45.0,"new_value":30.0,"forecast_anchor":"VPD ramp begins after 08:30 and outdoor RH falls to the teens by noon","expected_effect":"enter bounded recovery promptly during confirmed dry stress while restoring longer dwell overnight"},{"parameter":"mist_max_closed_vent_s","old_value":180.0,"new_value":180.0,"forecast_anchor":"lessons warn not to extend sealed mist during warm dry solar periods because it becomes a heat trap","expected_effect":"avoid trading VPD recovery for heat stress"},{"parameter":"mister_vpd_weight","old_value":2.4,"new_value":3.0,"forecast_anchor":"south/west mist paths are the most effective during dry solar stress and zone spread is modest","expected_effect":"prioritize productive zones during peak without over-watering overnight"}]}