Summer pattern is so much more stable than the Winter. Year-to-year has a pretty good overall correlation, like +0.3. So you can expect at like 62% the same pattern as last year most likely, in terms of the H5.
Fall I don't want to make a call on yet, I want to see if last years trend of +NAO's in the Summer continues or not. More +NAO this May-Aug may bring about a cooler Fall, imo (so more out to sea in the Atlantic late season).
Hard to say on specifics.. watch the MJO. Are you familiar with it? When it's favorable there are like 4x more storms in the Atlantic than when it's unfavorable. And MJO is a 40-day oscillation, so it can be somewhat predictable when you get closer.