Wednesday, 27 August 2014

East Coast Fall 26th and 27th August 2014

The first significant fall of the autumn occurred on the east coast on 26th and 27th August. Driven by a switch from a westerly to an easterly airflow, Norfolk received the bulk of the drift migrants with Pied Flycatcher, Barred Warbler, Wryneck, Red-breasted Flycatcher, Corncrake, Red-backed Shrike, Icterine Warbler and Greenish Warbler (at least two in Durham and Yorkshire on 26th and at least four in Norfolk on 27th) being the key species.
On 26th August the easterly airflow was driven by the northern edge of a low pressure system (L993) and the southern edge of a high pressure (H1014)

On 27th this switched to the airflow being dominated by an east to north-east flow from the high pressure system (H1018)