After coordinating with science partners, it has been determined that the Basin is full and continues to over-top. A Special Weather Statement has been issued to reflect this. As of 6am Tuesday, the release has NOT begun, but could happen at any point this week. Read More >
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Suicide Basin is a side basin of the Mendenhall Glacier above Juneau, Alaska. Since 2011, Suicide Basin has released glacier lake outburst floods that cause inundation along Mendenhall Lake and River annually with a record major flood event taking place on August 6, 2024. The latest release took place on October 20, 2024. Monitoring Equipment Status: The "Front of Basin" image will now be updated every 2 hours during daytime The USGS monitoring equipment is up and running. We will get 4 images from each of the 2 cameras per day. The USGS laser sensor data is active. There can be jumps or drops in the data from large ice bergs movement within the laser field of view. Latest basin site visit report by UAS from July 14th Last Webpage Update: 7AM Tuesday August 12th, 2025 Current Basin Status:
In past years it has taken up to 6 days for the main release to start after the basin is at full capacity and over topping which started on Sunday August 10th. We are releasing some educational videos about these outburst floods, how to find data, terminology and other information. Look for those videos on NWS Juneau's YouTube channel, here.
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Visit the Juneau Glacial Flood Dashboard to learn more about Suicide Basin and flood impacts including: inundation maps, forecast data basics, history, and other FAQ! |
Latest Basin Image - ScalesMost recent image from the basin, updated at daily to sub-daily intervals (see time-stamp bottom right). The camera is placed at the basin entrance and faces northeast, into the basin. Click on image to enlarge and read basin levels. Click on the links below the image to see a full-season viewer or recent timelapse.
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Latest Basin Image - VectorsMost recent image from the basin (same as on the left) with vectors indicating ice motion direction and magnitude. Click on image to enlarge. Click on the links below the image to see a full-season viewer or recent timelapse.
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Latest Basin Image - Front of BasinMost recent image from the camera taking images with a view of the front of the basin. This image will be updated at daily to sub-daily intervals. Click on the image to enlarge. Click on the links below the image to see a full-season viewer or recent timelapse.
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Suicide Basin Level (Pool Height)Graph showing the current (blue) pool height of Suicide Basin. Click on the image for more details (NWPS). At this time, values are from the USGS laser detection system.
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Mendenhall Lake Stage LevelGraph showing the current (blue) and predicted (purple) stage level at Mendenhall Lake. Stage levels are annotated on the left y-axis on the graph. The graph also shows the Mendenhall River discharge (right y-axis), which is derived from the Mendenhall Lake stage level via rating curve. Click on the image for more details (NWPS).
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Mendenhall River Stage Level @ Backloop BridgeGraph showing the current (blue) stage level of the Mendenhall River at the Backloop Bridge. Stage levels are annotated on the left y-axis on the graph. Click on the image for more details (NWPS). NOTE: Refer to the Mendenhall Lake gauge for forecast data and impact statements.
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Mendenhall River Stage Level @ Pedestrian BridgeGraph showing the current (blue) stage level of the Mendenhall River at the Pedestrian Bridge. Stage levels are annotated on the left y-axis on the graph. Click on the image for more details (NWPS). NOTE: Refer to the Mendenhall Lake gauge for forecast data and impact statements.
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Mendenhall River Stage Level @ Brotherhood BridgeGraph showing the current (blue) stage level of the Mendenhall River at the Brotherhood Bridge. Stage levels are annotated on the left y-axis on the graph. Click on the image for more details (NWPS). NOTE: Refer to the Mendenhall Lake gauge for forecast data and impact statements.
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Mendenhall Lake Forecast ScenariosGraph showing a modeled near 100% release forecast (gray) and the current no-release forecast (blue). This image is updated once daily in the afternoon starting in late May / early June.
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