Weather Blog

See the convergence zone in action

See the convergence zone in action

Normally I do these time lapses on Friday, but this afternoon's is too good to pass up.

This is time lapse video taken from atop the University of Washington Atmospheric Sciences building between 11:30 a.m. and 1:30 p.m. on Monday.

It's a perfect illustration of a Puget Sound Convergence Zone in action. (Read more about them at this link.)

This camera is looking toward the west. Note how the clouds are moving south to north when we had a south wind this morning, feeding the Convergence Zone over Everett.

Then, the zone moved south and passed through the University District around 1 p.m. and watch the clouds slow their northward trek, swirl around a bit, then abruptly switch to flowing from north to south as the zone passes by.