At last there is a forecast of warm southerly airflow for this weekend, a rare thing indeed this spring. This should unlock the floodgates and we should see a mass arrival of summer visitor and the exodus of any remaining winter visitors — it could be a busy weekend.
The last week has seen the continuation of a cold northerly airflow which is still holding up migrants further south. Most long-distance species are now here but in much smaller numbers than we would expect for this time in the spring. However, the weather is set to change over the weekend with a long-overdue warm southerly airflow moving in, which should see the floodgates open — it could be a busy latter half of the weekend, particularly at migration watchpoints and Bird Observatories.