π§ Contact: If you have questions or think we can help with your data needs, contact Ana TΓ‘rano at atarano@asu.edu or Hannah Kerner at hkerner@asu.edu.
ποΈ Last updated: This page was last updated on March 21, 2026 5:32AM (HNL).
Satellite and other geospatial data also allow us to better understand the evolution and impact of the Kona Low in March 2026 on Maui County and Hawaii. There is an abundance of information online about the storm including satellite data, but it can be hard to sort through everything. On this page, we organize the sources of satellite data related to the Kona Low storms and share resources for accessing this satellite data and derived products.
βΉοΈ This interactive map shows total rainfal in inches in Maui Nui (and Hawaii if you zoom out) from March 10th, 2026 through March 16th.
π To see individual stations, zoom in, click on the station βοΈ. Then, select "Display Conditions," and the "Precipitation" button for graphs of the total rainfall over time. Here's an example graph:
π In case of low connectivity, we have linked a screenshot of the total rainfall in Maui Nui from March 10th, 2026 through March 16th.
π In case of low connectivity, we have linked a screenshot of the wind gusts in miles per hour (mph) in Maui Nui on March 14th, some of the highest recorded in the storm.
βΉοΈ Use the animation to track rainfall intensity over time; red areas indicate the highest rates (over 1 in/hr).
Credit: Arizona State University/NASA Acres Team using NASA GPM IMERG data.βΉοΈ This interactive map allows you to see the estimated total rainfall in inches (in) from the first Kona Low Storm using GPM IMERG data. πClick anywhere on the map to see a local time series of rainfall rate (in/hr) and total accumulated rainfall (in) from March 9th through March 16th.
β οΈ Note that this data has not been bias-corrected yet and represent larger areas than the ground-based measurements so the total precipitation during intense rainfall may be underestimated.
π In case of low connectivity, we have linked a screenshot of the accumulated rainfall (inches) in Maui Nui from March 9th to the 16th.
βΉοΈ This interactive map shows the estimated flood extent across Maui Nui from March 13-14 based on NASA SERVIR HYDRAFloods modeling tools. Areas shown in red indicate locations where flooding was detected after filtering out streams, permanent water bodies, and pre-existing wet areas. USGS streamflow conditions from February 2026 are also shown to provide context on how wet conditions leading up to the storm may have influenced flooding. Areas shown in blue represent water detected by HYDRAFloods within mapped reservoirs, which may reflect elevated water levels rather than flooding.
β οΈ These flood estimates are based on a limited time window and have not been fully validated. As a result, they may underestimate the true extent and impacts of flooding, particularly in areas with short-lived or rapidly changing conditions.
π In case of low connectivity, we have linked a screenshot showing the estimated flood extent from March 13β14, including areas of detected flooding and water within mapped water bodies.
π To explore the map, zoom in and βοΈ click on a stream gauge. A panel will appear showing streamflow conditions and additional information for that area. Use the legend to toggle visibility of flood extent and streamflow categories.βΉοΈ The Department of Land and Natural Resources has developed and maintains the Hawaii Flood Hazard Assessment Tool (FHAT). The FHAT is an informational map viewer that displays FEMAβs Geographic Information Systems (GIS) version of the FIRM map. User can search by area of interest, address, TMK number, stream or watershed name, and by a specific Letter of Map Change (LOMC).
