COASTAL OCEAN OBSERVATORY CALIFORNIA
Can we watch a Kelvin wave
move up the coast?
A small, transparent test for a northbound non-tidal sea-level signal—using NOAA water-level observations from August 2026 through today.
SIGNAL FIELD / AUG 2026 — TODAY
Northbound anomaly
SEA-LEVEL ANOMALY CM
−12 0 +12
Requesting observed water level and predicted tides
from NOAA CO-OPS…
01 AUGTODAY
OPEN DATA, REPRODUCIBLE METHOD
Measured, not modeled.
The main chart calls NOAA’s public CO-OPS API in your browser whenever it loads. Missing or delayed records are surfaced rather than filled in. DART and satellite layers remain deliberately out of scope for this first pass.