Fri 19 Aug 2011

First image is of the winds aloft at 850 mb (approx 5000 ft). Winds over the state were light (10 knots) but from the north. They were stronger off the coast and to the north.  The winds offshore were up to  25 knots, and much closer to shore than yesterday — again i’m not sure if that will impact terrestrial migration, but along the coast it should bring a few migration-ready birds along with it.  From the reflectivity it doesn’t look like very much though.

Second image is a snapshot of the base velocity showing north to south directionality at a peak of 20 to 25 knots.

Third image is an animated gif with snapshots every half hour of the base reflectivity above radar station RTX.  Animation runs from around 8:00 pm pdst yesterday evening through 5:00 am pdst this morning. (Click on the thumbnails to view the full-sized images and animation.)

Fourth image is a snapshot of the base velocity from May 16, 2011 to show the south to north directionality of spring migration.  Just in case anyone is wondering if we’re really looking at birds.

Sunset last night was at 8:13 pm pdst.

Density is pretty light considering the favorable wind conditions, but there is movement.