Alabama's Real-Time Coastal Observing System (ARCOS)

Since 2003, Dauphin Island Sea Lab (DISL) has been collecting real-time environmental monitoring data in and around Mobile Bay. The meteorological and hydrographic data provided by DISL is very important for understanding the complex ecosystems of Mobile Bay. Our overall goals and objectives are to continue to make this high-quality data available for decision makers, researchers, and the general public, not only to assist our users in forming effective strategies when faced with natural and man-made disasters, but also to enhance the economy, and to protect the environment.

If you’d like to download the data please see The Data section below.

About Us

ARCOS is maintained by a team of dedicated technicians and data managers.

Heashot of Pat David

Pat David

Data Architect

Heashot of Josh Goff

Josh Goff

Lead ARCOS Technician

Contact Us

Sponsors and Partners

Current Sponsors

Current Partners

Previous Sponsors

The Data

We have generated data outputs for you to download; broken down by station, met/hydro, and year.
Please note that timestamps in these files are normalized to Coordinated Universal Time (UTC).
Data parameters for the files can be found in the parameters section below.
Data range parameters can be found on the Data Range Page.

Battleship Park

30.682697, -88.012211


2022 2023


2022 2023

Bon Secour

30.328767, -87.829267

Cedar Point

30.308450, -88.139533

Dauphin Island

30.251286, -88.077813

Katrina Cut

30.258267, -88.213083

Meaher Park

30.667152, -87.936459

Middle Bay Lighthouse

30.438457, -88.011351

Perdido Pass

30.279100, -87.556083



Parameter Column Name Unit
Air Temperature airtemp1 Degrees Celsius, °C
Wind Speed windspeed1 knots, kn
Wind Direction winddir1 Degrees, °
Precipitation precip1 Inches, in
Quantum Radiation quantumrad1 µEinsteins/m2/s
Solar Radation solarrad1 Kilowatt per square meter, KW/m2
Barometric Pressure bar_pressure1 Inches of Mercury, “Hg
Relative Humidity relhumid1_avg Percent Relative Humidity, %


Parameter Column Name Unit
Water Temperature watertemp1_avg Degrees Celsius, °C
Salinity salinity1_avg Practical Salinity Unit, PSU
Pressure pressure Pounds per square inch, PSI
Depth depth1_avg Meters, m
Dissolved Oxygen % dis_oxy1_avg Percent, %
Dissolved Oxygen dis_oxy2_avg Milligram per Liter, mg/L
Turbidity turbidity1_avg Formazin Nephelometric Units, FNU


The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided “as is” without warranty of any kind, either expressed, implied, or statutory. This is to include, but is not limited to, the implied warranties or merchantability and fitness for a particular purpose. The user assumes the entire risk as to quality and performance of the data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the Dauphin Island Sea Lab (DISL) be liable for direct, indirect, incidental, consequential or special damages of any kind. DISL does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers, transformations, or conversions, nor is there responsibility assumed to maintain the data in any manner or form. These data have been developed from the best available sources. Efforts have been made to ensure that the data are accurate and reliable, however, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors and other circumstances specific to these data. The user is responsible for understanding accuracy limitations of the data and determining fitness for its use. These data have been processed successfully on computer systems at the DISL, however, no guarantee, expressed or implied is made by DISL regarding the use of these data on any other system, nor does the act of distribution constitute or imply such a warranty. Distribution of these data is intended for information purposes only.