ERA5 Hindcast — 2026-05-21

Reconstructed from ERA5 reanalysis — not a live forecast rep

This page is built after the fact from ERA5 reanalysis: it shows what the weather actually did along the corridor on this date, not a forecast or analog that was issued at the time. The live daily practice reps (with analog matching and convergence tracking) begin 2026-05-28 — see the Daily Analysis overview. Past-month setup context only; pre-race research, frozen into the build (RRS 41).

Reanalysis actuals · Newport→Bermuda corridor · T−29 to the 2026 start · « all hindcast days · live Daily Analysis

What the corridor did — 2026-05-21

At the 37°N Gulf Stream crossing, ERA5 has the day's wind moderate — max 18 kn, gusting 25 kn, dominant WSW, mean sea-level pressure 1022 hPa. Peak corridor wave 1.6 m.

Corridor profile (ERA5 actuals)

waypoint	wind max	gust max	dominant dir	MSLP
Start / coastal	16 kn	23 kn	N	1019 hPa
Continental shelf	21 kn	26 kn	WSW	1019 hPa
Gulf Stream crossing	18 kn	25 kn	WSW	1022 hPa
Post-Stream	10 kn	14 kn	SW	1024 hPa
Bermuda approach	5 kn	8 kn	SSE	1025 hPa

Wind in knots (10 m), gust = daily max, MSLP = daily mean. Source: ERA5 reanalysis via the Open-Meteo Archive API. Ocean/SST and Gulf Stream wall geometry are observational products, not reconstructed here — see the Gulf Stream pages.