gage height, Oct 23, 2026 at 2:15 PM CDT · 3 hours ago
Highest since 2009 (USGS)
10.79 ft (June 7, 2020)
Usual range
7.17 to 8.64 ft
USGS marks recent readings as provisional: they can be revised after review.
No National Weather Service alert covering Jefferson Parish was active when this page was generated (Oct 23, 2026 at 5:05 PM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.
Last 7 days
Hourly averages of USGS readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.
How to read this gauge
Gage height is the height of the water surface above this gauge's own zero point, which sits at -6.31 ft NAVD88. It is not a water depth and not an elevation: add -6.31 ft to get the water surface elevation.
Daily highs and lows since September 11, 2026
Annual peaks since 2009
In 18 complete water years of comparable USGS records (since 2009), the highest peak was 10.79 ft on June 7, 2020. So far in water year 2027 (since October 1) the highest reading is 9.33 ft on October 2, 2026, higher than the annual peak in 7 of 18 years.
Each dot is the highest gage height of a water year (October to September), from the USGS annual peak record, with recent years USGS has not published yet taken from its 15-minute readings and this site's own; hover a dot for its date. Dashed lines are NWS flood stages.
NWS historic crests
Date
Crest
Above minor flood stage
July 18, 1997
4.05 ft
—
March 13, 1999
2.97 ft
—
The highest crests the National Weather Service lists for this gauge, as published. They can differ from the USGS annual peaks above: USGS records the year's highest gage height, which is not always the crest the NWS lists for the same flood.
Download the readings
barataria-pass-at-grand-isle.csv (CSV): every reading stored for this gauge since September 11, 2026, 4,046 rows, with time in UTC and Central, gage height in feet, and the USGS approval status.
Source. Gage height from the U.S. Geological Survey. This site is not affiliated with either agency.
