Lake Ontario OFS Currents Forecast Guidance

Effective on May 20, 2020 beginning at 18z Coordinated Universal Time (UTC), two major changes for NOS OFS datasets on THREDDS will be implemented. Please see the Service Change Notice for details

1. Retention period change - Only the most recent 31 days of OFS output files will be available on CO-OPS THREDDS.

2. File structure changes - To improve THREDDS performance related to file access and data aggregation

All model nowcast and forecast information is based on a hydrodynamic model and should be considered as computer-generated nowcast and forecast guidance.


Currents Forecast Guidance
This near surface current velocity animation was created from the latest LOOFS forecast guidance. The forecast guidance is for the next 30 hours of current velocities as simulated by the model when it is forced by coastal water levels and winds that are predicted by National Weather Service models. Currents through the deeper navigation channel are stronger than those in the shallower areas.