Sep 5, 2025
Trans-Pacific Spotlight: West Coast Gateways Steady Amid Typhoon Diversions
US West Coast gateways held steady week-over-week while typhoon-led diversions raised anchorage dwell across East Asia. Our 30-day baseline shows variance within normal bands and a healthy recovery trajectory.
Executive summary
West Coast gateways maintained stable flow, with LA/LB tracking near seasonal averages. Diversions into South China raised short-lived anchorage dwell; those spikes normalized within 72 hours as weather windows reopened. Rail fluidity into PRR/Vancouver improved, reducing inland congestion risk.
By the numbers (30-day window)
- USLAX avg_wait_hours p50: 18.4h; p95: 38.2h
- USLGB avg_wait_hours p50: 17.9h; p95: 36.5h
- CNSZX (Yantian/Shekou) p95 peak: 42h (D-2); normalized ~28h by D
- HPHCM feeder roll ratio edged up 3–4 pp on week-end bunching
Signals to monitor next week
- Weekend bunching in South China hubs after weather holds; watch feeder rotations.
- Rail dwell into inland ramps for ex-Vancouver cargo; monitor PRR yard meters.
- Schedule reliability of your top-3 carriers into LA/LB; add exception alerts at 0.7+ congestion_score.
How to reproduce with API
- Pull trend for USLAX and CNSZX over 30 days; fields=avg_wait_hours,congestion_score.
- Flag days where congestion_score > 0.65 or avg_wait_hours ↑30% w/w.
- Trigger Slack/webhook with last 5 points and a recommended buffer (+1–3 days).
Actionable checklist
- For critical SKUs on TP1/TP2 strings, hold +1 day buffer until South China variability stabilizes.
- Keep exceptions live for weekend arrivals at LA/LB (Friday–Monday).
- Review inland rail bridges on SKUs routed via PRR to avoid last-mile delays.