Ossjøen (Numedalslågen): discharge and water level

Ossjøen (Numedalslågen): discharge 20.6 m³/s (75% of mean flow), water level 1.29 m – below mean flood. Measured 23/10/2026, 18:00 CEST.

Now

20.6 m³/s below mean flood

Water level: 1.288 m (local datum) · Measured: 23/10/2026, 18:00 CEST · uncontrolled

Discharge, recent days (20.5–20.6 m³/s)

Mean flow (catchment statistic)27.4 m³/s
Mean annual flood220 m³/s
5-year flood271 m³/s
50-year flood374 m³/s

NVE flood statistics (culmination values) for 1983–2025.

Source: Data: NVE (Norges vassdrags- og energidirektorat), HydAPI · Licence: NLOD 2.0 · Updated 23/10/2026, 19:45 CEST. Raw data, mostly not yet quality-controlled by NVE. Not an official flood warning – see varsom.no.

🔔 Notify me E-mail on flood levels or your own threshold – not an official warning

Precipitation, last 7 days

6.4 mm fell at MET station Geilo - Oldebråten (16.9 km away).

2026-10-16: 1.8 mm16.1.82026-10-17: 0 mm17.02026-10-18: 0 mm18.02026-10-19: 0 mm19.02026-10-20: 0 mm20.02026-10-21: 0.4 mm21.0.42026-10-22: 4.2 mm22.4.2
Data: MET Norway (Frost API, SN25630) · NLOD 2.0 / CC BY 4.0 · daily values, provisional

Water body status (EU Water Framework Directive)

  • NUMEDALSLAAGEN FRA OSSJOEEN TIL PAALSBUFJORDEN NO015-1284-R
    Ecological status: good (2013) · Chemical: not assessed
  • NUMEDALSLAAGEN FRA OSSJOEEN TIL DAGALI BEKKEFELT NO015-946-R
    Ecological status: good (2012) · Chemical: not assessed

Official assessment of the water body at this gauge from the 2022 river basin management plans (WFD target: at least “good”). It rates the whole water body, not today’s water quality.

EEA WISE – WFD 2022 (3rd RBMP), © EEA, CC BY 4.0