Mauna Loa Observatory - NOAA Global Monitoring Laboratory

The 2022 eruption of the Mauna Loa volcano cut off road access to the Mauna Loa Baseline Observatory. Construction on the temporary Mauna Loa Access road was completed on 26 March, 2026.

At this time, there is no site access for the general public to the Mauna Loa Observatory and NOAA has not yet established a public opening date. GML and scientific partners are working together to bring mission critical scientific projects back online. It is still unclear when utility infrastructure will be replaced and power re-established to the site.

We will provide another update as more information becomes available.

Media contact: Theo Stein at (303) 819-7409 or theo.stein@noaa.gov.

NOAA Mauna Loa Web Meteorology System

Organization(s):

NOAA logo National Oceanic and Atmospheric Administration (NOAA),
Earth System Research Laboratory (ESRL)

What does this program measure?

UV Index Plot
It measures temperature in Fahrenheit, wind direction in degrees, wind speed in mph, humidity in %, rain in inches, solar radiation in W m-2, and UV index.

How does this program work?

Solar Radiation Plot
A Davis Advantage pro plus weather station measures continuously at MLO, and data is made available at the MLO web site to the public (via internet). Click here to view today's Web Meteorology page.

Why is this research important?

Hourly Rain Plot
This system was set up for aiding staff and visitors on the conditions at the observatory site prior to arriving at the station by using a web browser.