L Pontchartrain at Crossover 4 near Mandeville water level

Name: L Pontchartrain at Crossover 4 near Mandeville water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Lake, L Pontchartrain, Louisiana, United States

Directions

High for mid-October

Water level

1.21ft Down 0.12 ft over the last 24 hours

Measured Oct 20, 2026, 11:00 AM CDT (53 min ago)

History

What this means

At 1.21 ft, L Pontchartrain at Crossover 4 near Mandeville is holding more water than usual for mid-October.

That puts it 0.29 ft above the median of 0.92 ft for mid-October, based on 7 years of readings. A year ago it stood at 1.29 ft (−0.08 ft).

It is still going down, by 0.12 ft over the past 24 hours. The 30-day range is 0.28 ft – 2.49 ft.

Lakes and reservoirs often sit lower in fall after a summer of evaporation and use, and recover with winter rain and spring snowmelt.

Compared with 7 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 0.92 ft0.29 ft above the median for this date
Normal for this date: 0.29 ft – 1.42 ft8 years in 10 fall in this range (7 years of records)
Same day last year: 1.29 ft−0.08 ft
Lowest and highest in 30 days: 0.28 ft – 2.49 ft
Lowest and highest in 12 months: −1.76 ft – 2.49 ft
Highest on record: 6.14 ftOctober 29, 1985

Boating and fishing at L Pontchartrain at Crossover 4 near Mandeville

Slightly high water rarely causes problems on the water itself, though some low-lying shoreline spots may be wet.

Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.

Highest crests on record

Rank	Level	Date
1	6.14 ft	October 29, 1985
2	4.77 ft	July 30, 1995

Weather at the gauge

No rain in the last 3 days.

20 Tue 75° 64° – Wind 22 mph

21 Wed 76° 67° – Wind 16 mph

22 Thu 80° 62° – Wind 6 mph

23 Fri 80° 64° – Wind 12 mph

24 Sat 76° 65° – Wind 15 mph

25 Sun 77° 65° – Wind 15 mph

26 Mon 78° 64° – Wind 13 mph

Forecast: Open-Meteo

Sunrise 07:06 AM Sunset 06:25 PM Daylight 11 hr, 19 min Waxing gibbous 70%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Inner Harbor Navigation Canal near Seabrook bridgeRiver gauge, Inner Harbor Navigation Canal	2.29 ft	High	+0.46 ft	13 mi
Tchefuncte River at MadisonvilleRiver gauge, Tchefuncte River	1.60 ft	Normal	−0.10 ft	14 mi
GIWW East Storm Surge Barrier at New OrleansRiver gauge, GIWW East Storm Surge Barrier	1.74 ft	Normal	−0.24 ft	18 mi
Bayou Liberty near SlidellRiver gauge, Bayou Liberty	2.15 ft	High	−0.11 ft	19 mi
Bogue Falaya River at Boston St. at CovingtonRiver gauge, Bogue Falaya River	1.99 ft	High	−0.06 ft	19 mi
Abita River north of Abita SpringsRiver gauge	6.91 ft	Low	−0.01 ft	20 mi
Tchefuncte River near CovingtonRiver gauge, Tchefuncte River	9.09 ft	Very low	±0	21 mi
Bogue Falaya at CovingtonRiver gauge, Bogue Falaya	3.85 ft	Normal	−0.01 ft	21 mi

Questions and answers

How does L Pontchartrain at Crossover 4 near Mandeville compare with last year?

It is 0.08 ft lower than on the same day last year, when the reading was 1.29 ft.

What is a normal level for L Pontchartrain at Crossover 4 near Mandeville in mid-October?

The median for mid-October is 0.92 ft. In 8 years out of 10 the reading falls between 0.29 ft and 1.42 ft, based on 7 years of records.

What is the water level of L Pontchartrain at Crossover 4 near Mandeville today?

On Oct 20, 2026, 11:00 AM CDT, the water level was 1.21 ft. Down 0.12 ft over the last 24 hours.

Is L Pontchartrain at Crossover 4 near Mandeville rising or falling?

Down 0.12 ft over the last 24 hours. Up 0.55 ft over the last 7 days.

Is the level of L Pontchartrain at Crossover 4 near Mandeville normal?

High for mid-October. Compared with 7 years of daily readings for this time of year.

What is the highest water level ever recorded at L Pontchartrain at Crossover 4 near Mandeville?

The highest level on record is 6.14 ft on October 29, 1985.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:301200090072400 (Agency page)
Coordinates: 30.19964, -90.12275 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	1.21 ft	2026-10-20 16:00	Provisional

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How to cite

U.S. Geological Survey: L Pontchartrain at Crossover 4 near Mandeville (usgs:301200090072400). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/louisiana/l-pontchartrain-at-crossover-4-near-mandeville

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer