Water Temperature Data for Opalescent Spring, Yellowstone National Park

Hot spring located at the northwest end of Porcelain Terrace.

The water is neutral-to-alkaline, and rich in Cl. Water rising into the pool is boiling (~92°C). The temperature is measured at ~10 cm depth, toward the edge of the pool. The water level in the pool appears to have remained stable in recent years. The site is off-limits to the public and is surrounded by unstable thermal ground.

Opalescent Geyser, Norris Geyser Basin, Yellowstone National Park....

Opalescent Geyser, Norris Geyser Basin, Yellowstone National Park. (Credit: Lowenstern, Jacob. Public domain.)

Water temperature is measured beneath the pool surface. Temperature increases may reflect increased inflow of thermalwater. Sudden decreases in temperature could be a result of a drop in water level beneath that of the temperature probe. This will usually result in large diurnal (24-hour) variations as the probe measures air temperature instead of water temperatures. Smaller diurnal variations are normal in pools.

Daily Temperature Graph

Daily Temperature Graph - Opalescent Spring

Weekly Temperature Graph

Weekly Temperature Graph - Opalescent Spring

Monthly Temperature Graph

Monthly Temperature Graph - Opalescent Spring

Additional Information