M74 off slip junction 9, route-based weather forecasts: EIR release

All weather forecast data held for the period 0000 hours on 23 January to 1200 hours on 25 January for the above location (M74 off slip, junction 9). This should include (if available), but not limited to, textural information for each day and indications of whether they are route-based forecasts for the road concerned or an area-wide forecast associated with a weather out-station. 

What treatment criteria was Scotland Transerv working to at the time of the above incident (between 23 January and 25 January 2018) regarding what forecasts would merit action.