Kathy Berg from Birch Bay sent this out on her e-mail list. It’s from Barry Wenger at the state Department of Ecology, which measures water levels with automatic gauges. The following graphic shows the levels from Padilla Bay, in Skagit County. Note the effects of the tsunami.
As part of our national monitoring program we maintain 4 water quality stations in the Bay, operating 24/7 and sampling every 30 minutes with automated data feeds to the NOAA network. We also maintain one of these with a water level recorder tied to NOAA elevation datum.
Attached is the water level data for last week showing our nice, normal tides (two highs and two lows per day) on March 8th-10th. Note the change shortly after the Japan tsunami…some of these “bounces” are well over a foot, and then they continue for nearly 3 days with rebound from land masses.
Click here for a clearer version of the image posted above.