Coastal vagrant weather
I believe that changes in offshore weather correlates with with the occurrence of vagrant land birds at Point
Reyes and on the Farallons, California. The normal weather pattern here in June consists of a high pressure ridge
situated about 1,000 miles west of the coast and a thermal trough in the interior deserts. This pattern results
in strong Northwest wind flow along the coast.
The best conditions are when offshore winds are light (under 10 knots). If winds are from the south or southeast, even better. A high marine layer is usually preferable to clear skies. Dense low fog or clear skies with strong NW winds are the worst.
I use this site: http://www.lajollasurf.org/nocal.html
Arrow vectors immediately show current offshore wind speed and direction. In general we hope for short arrows and arrows pointing towards the north Click on the buoy for your area. For Point Reyes it is the Bodega Buoy:
Each buoy station offers detailed wind direction and speed charts for the past five days. Notice if the plots
show any dips in wind direction. Those are switches from prevailing NW winds to more southerly flow. If these dips
are also accompanied by drops in wind speed, there will likely be vagrants. If favorable conditions persist for
multiple days, along with a stable marine layer, conditions will likely be excellent.
Good vagrant finding!