Friday 21 September 2012

The weather has changed slightly as an upper level low pressure trough has pushed a  marine layer inland bringing cooler temperatures and a little precipitation.  The winds are light and variable with a bit of a southerly bias.

This will pose little challenge to determined southbound migrants but conditions are not optimal.  So last night we again saw only moderate amounts of birds moving through the area.  On the regional composite you can see sharply diminished returns along the coast and the Puget Sound again has the highest density of birds.  Through the night the bulk of the returns where along the western flanks of the Cascades.

I’ll be in the field again this weekend.  So, unless something inspiring happens this weekend to get me to post in the evening, the next update should be Monday the 24th.