Thurs 18 Aug 2011

First image is of the winds aloft at 850 mb (approx 5000 ft). Winds over the state were light but from the north. They were a bit stronger off the coast and to the north.  The winds offshore were up to  20 knots — again i’m not sure if that will impact terrestrial migration.  From the reflectivity it doesn’t look like very much.

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.)

Sunset last night was at 8:15 pm pdst.

Density is pretty light considering the favorable wind conditions.