ENST — Sandnessjøen Airport; Stokka

fog forecast & climatology · Alstahaug city page · full 10-year analysis →
No fog forecast feed exists for this station. September typically brings about 4 hours of dense fog here (10-year average).

Fog hours per year
31 h below CAT I minima (2016–2026 average)
Fog season
July and April
Typical fog event
~1 h once it forms (middle half 1–2 h, n=128)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Sandnessjøen Airport; Stokka spends 31 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in July and April. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~1 hJanFebruary: ~4 hFebMarch: ~4 hMarApril: ~9 hAprMay: ~9 hMayJune: ~6 hJunJuly: ~13 hJulAugust: ~8 hAugSeptember: ~4 hSepOctober: ~1 hOctNovember: ~4 hNovDecember: ~5 hDec
Fog season is February, March, April, May, June, July, August, September, November, December, peaking in July; fog is mostly a midnight–4 AM phenomenon; typically thinning out by 5 AM; a typical event lasts about 1 hour once it forms local time · 10-yr average

For flight operations

EFVS crews: the CHASE board ranks airports by live fog status, approach lighting, go-around height and flight time from your base. Forecast probabilities publish here per-airport once the calibrated model beats climatology on live verification — receipts on the scorecard. Methodology.

Sources: NOAA/NWS National Blend of Models guidance · METAR observations 2016–2026 (Iowa Environmental Mesonet) · FAA NASR. Machine access: data.json · llms.txt. Not for operational use.