02/20/2018 04:20 UTC: Significant server issues are affecting the dissemination of OPC products. Please carefully check issuance times.
Experimental Freezing Spray GuidanceCAUTION: Some images below have not updated recently
The Overland* and Stallabrass images above depict the forecast ice accumulation rate (in cm/hour) at 12 hours, 24 hours, and 36 hours. The rate is an instantaneous forecast, not cumulative.
The guidance is based on the Global Forecast System (GFS) model data.
*More information on the Fetch Factor applied to Overland freezing spray algorithm (pdf).