During the dry season (from April/May to September), dry southerly and easterly trade winds predominate. This allows for a short period of improved imaging of extremely northerly or southerly sources. Despite its Alpine location, prevailing southerly winds make the climate comparatively mild. Heat waves are rare due to mountains blocking southerly winds. Winter storms are often accompanied by strong southerly winds. This coupled with strong southerly winds in the autumn often brings flooding to the area. Such events occur on clear nights following a day of cold southerly winds. As a result, Sunderland's coastline is likely slightly milder given the more southerly position. The climate here is much colder than in more southerly parts of Britain. Brow Head is the most southerly point of mainland Ireland. Spring was southerly and cold with slight rain. The second are those tributaries that flow in a general southerly direction. The oceanic climate is prevalent in the more southerly parts of Oceania. Past here, Skyline Drive continues along a southerly track. Some species of deer are found on the more southerly islands.