Mississippi Sound at Usgs Merrill Shell Bank Light water level

Name: Mississippi Sound at Usgs Merrill Shell Bank Light water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Estuary gauge, Mississippi Sound, Mississippi, United States

Directions

High for late October

Water level

3.81ft Down 0.39 ft over the last 24 hours

Measured Oct 21, 2026, 04:45 AM CDT (38 min ago)

Water temperature: 70 °F

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

High water at Mississippi Sound at Usgs Merrill Shell Bank Light: the latest reading is 3.81 ft, above normal for late October.

That puts it 0.46 ft above the median of 3.35 ft for late October, based on 20 years of readings. A year ago it stood at 3.64 ft (+0.17 ft).

It is still going down, by 0.39 ft over the past 24 hours. The 30-day range is 2.82 ft – 5.02 ft.

The sensor also reports a water temperature of 70 °F.

Compared with 20 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 3.35 ft0.46 ft above the median for this date
Normal for this date: 0.75 ft – 4.22 ft8 years in 10 fall in this range (20 years of records)
Same day last year: 3.64 ft+0.17 ft
Lowest and highest in 30 days: 2.82 ft – 5.02 ft
Lowest and highest in 12 months: 0.87 ft – 5.18 ft

Weather at the gauge

No rain in the last 3 days.

21 Wed 74° 63° – Wind 18 mph

22 Thu 75° 65° – Wind 11 mph

23 Fri 73° 61° – Wind 10 mph

24 Sat 72° 63° – Wind 13 mph

25 Sun 70° 62° – Wind 14 mph

26 Mon 71° 61° – Wind 12 mph

27 Tue 72° 63° – Wind 8 mph

Forecast: Open-Meteo

Sunrise 07:04 AM Sunset 06:21 PM Daylight 11 hr, 17 min Waxing gibbous 76%

Map

Other gauges on the Mississippi Sound

Gauge	Level	Compared with normal	24 hours	Distance
Mississippi Sound at Usgs Round Island LightTidal gauge, Mississippi Sound	2.94 ft	No reference yet	−0.08 ft	40 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Wolf River at Belle Ferry Road near Long BeachTidal gauge, Wolf River	2.87 ft	Below flood stage	−0.24 ft	11 mi
Jourdan River near Bay St LouisRiver gauge, Jourdan River	1.65 ft	Normal	−0.15 ft	16 mi
Wolf River near LandonRiver gauge, Wolf River	4.14 ft	Very low	−0.01 ft	17 mi
Biloxi River near LymanRiver gauge, Biloxi River	2.16 ft	Below flood stage	−0.10 ft	21 mi
Biloxi River at WorthamRiver gauge, Biloxi River	−0.94 ft	Very low	−0.01 ft	23 mi
Biloxi Bay at Point Cadet Harbor at BiloxiEstuary gauge, Biloxi Bay	1.10 ft	Normal	−0.11 ft	25 mi
Tchoutacabouffa River near D'ibervilleRiver gauge, Tchoutacabouffa River	1.91 ft	Below flood stage	−0.07 ft	27 mi
Pearl River at I-10 near SlidellRiver gauge, Pearl River	2.63 ft	Very low	−0.04 ft	28 mi

Questions and answers

How does the Mississippi Sound at Usgs Merrill Shell Bank Light compare with last year?

It is 0.17 ft higher than on the same day last year, when the reading was 3.64 ft.

What is a normal level for the Mississippi Sound at Usgs Merrill Shell Bank Light in late October?

The median for late October is 3.35 ft. In 8 years out of 10 the reading falls between 0.75 ft and 4.22 ft, based on 20 years of records.

What is the water level of Mississippi Sound at Usgs Merrill Shell Bank Light today?

On Oct 21, 2026, 04:45 AM CDT, the water level was 3.81 ft. Down 0.39 ft over the last 24 hours.

Is Mississippi Sound at Usgs Merrill Shell Bank Light rising or falling?

Down 0.39 ft over the last 24 hours. Up 0.57 ft over the last 7 days.

Is the level of Mississippi Sound at Usgs Merrill Shell Bank Light normal?

High for late October. Compared with 20 years of daily readings for this time of year.

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.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:301429089145600 (Agency page)
Coordinates: 30.23825, -89.24282 (WGS84)
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	3.81 ft	2026-10-21 09:45	Provisional
Water temperature	70 °F	2026-10-21 09:45	Provisional

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How to cite

U.S. Geological Survey: Mississippi Sound at Usgs Merrill Shell Bank Light (usgs:301429089145600). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/mississippi/mississippi-sound-at-usgs-merrill-shell-bank-light

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