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Rio Maunabo at Lizas water level

River gauge, Rio Maunabo, Puerto Rico, United States

Directions

Right now

Normal for mid-October

Water level

3.72ft Up 0.07 ft over the last 24 hours

Flow
4.4 cfs
5 10 15 Highest onrecord 17.46 ft Minor floodstage 10.00 ft

History

History
3.54.04.5ftOct 13Oct 14Oct 15Oct 17Oct 183.54.04.5ftOct 13Oct 15Oct 18
3.54.04.5ftSep 20Sep 27Oct 4Oct 11Oct 183.54.04.5ftSep 20Oct 4Oct 18
345ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026345ftOct 2025Apr 2026Oct 2026
345ftJanMarMayJulSepNov2026345ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

The gauge at Rio Maunabo at Lizas reads 3.72 ft, a normal level for mid-October.

The median for mid-October is 3.83 ft, based on 30 years of readings, so the river stage is 0.10 ft below typical. It is 6.28 ft below the flood stage of 10.00 ft. On the same day last year the reading was 3.68 ft, a difference of +0.04 ft.

The water is rising: up 0.07 ft over the past 24 hours. There is still 6.28 ft of room before flood stage. Over the past 30 days it has moved between 3.48 ft and 4.40 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 30 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
3.83 ft0.10 ft below the median for this date
Normal for this date
3.32 ft – 4.23 ft8 years in 10 fall in this range (30 years of records)
Same day last year
3.68 ft+0.04 ft
Lowest and highest in 30 days
3.48 ft – 4.40 ft
Lowest and highest in 12 months
3.48 ft – 4.87 ft
Highest on record
17.46 ftSeptember 20, 1994

What the stage means on the water

A normal level is usually prime time for floating and wade fishing, as long as the weather holds upstream.

The National Weather Service puts flood stage for this gauge at 10.00 ft, still 6.28 ft away.

What happens at each level

11.00 ft
Flooding along PR-759 in sector Garona. Several neighborhoods affected, such as Tumbao, Palo Seco, Matuyas & Lizas. Updated on Aug 24/erg
3.72 ft
Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

RankLevelDate
117.46 ftSeptember 20, 1994
217.40 ftSeptember 21, 2008
316.69 ftSeptember 10, 1996
414.84 ftNovember 25, 1977
514.64 ftSeptember 16, 1975
614.57 ftAugust 31, 1979
713.26 ftOctober 11, 1973
812.53 ftSeptember 20, 1976
911.86 ftSeptember 20, 2017
1011.27 ftNovember 8, 2004

Weather at the gauge

Rain in the last 3 days: 0.19 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 86° 76° 0.13 in, 66% Wind 8 mph
18 Sun 86° 75° 0.08 in, 84% Wind 6 mph
19 Mon 86° 73° 0.13 in, 81% Wind 7 mph
20 Tue 86° 73° 0.06 in, 59% Wind 5 mph
21 Wed 85° 73° 0.06 in, 39% Wind 7 mph
22 Thu 84° 74° 0.12 in, 77% Wind 7 mph
23 Fri 85° 73° 0.34 in, 66% Wind 7 mph

Forecast: Open-Meteo

Sunrise 06:19 AM Sunset 06:00 PM Daylight 11 hr, 41 min First quarter 54%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Rio Guayanes near YabucoaRiver gauge, Rio Guayanes 10.61 ft Normal +0.43 ft 3.4 mi
Rio Marin near PatillasRiver gauge, Rio Marin 6.52 ft Normal −0.02 ft 4.6 mi
Rio Guayanes at Central RoigRiver gauge, Rio Guayanes 13.10 ft Normal +0.52 ft 5.1 mi
Canal De Patillas at ForebayCanal gauge, Canal De Patillas 1.57 ft High +0.01 ft 5.5 mi
Rio Grande De Patillas below Lago PatillasCanal gauge, Rio Grande De Patillas 4.32 ft Low −0.01 ft 5.5 mi
Rio Grande De Patillas near PatillasRiver gauge, Rio Grande De Patillas 4.74 ft Normal +0.06 ft 6.1 mi
Rio Grande De Loiza at Quebrada ArenasRiver gauge, Rio Grande De Loiza 5.11 ft Normal +0.01 ft 7 mi
Rio Cayaguas at Cerro GordoRiver gauge, Rio Cayaguas 5.99 ft Normal +0.04 ft 9 mi

Questions and answers

Is the Rio Maunabo at Lizas higher than last year?

Yes, it is 0.04 ft higher than on the same day last year, when the reading was 3.68 ft.

What is flood stage for the Rio Maunabo at Lizas?

The official flood stage is 10.00 ft. The level is currently 6.28 ft below it.

What is a normal level for the Rio Maunabo at Lizas in mid-October?

The median for mid-October is 3.83 ft. In 8 years out of 10 the reading falls between 3.32 ft and 4.23 ft, based on 30 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Rio Maunabo at Lizas today?

On Oct 18, 2026, 07:30 PM AST, the water level was 3.72 ft. Up 0.07 ft over the last 24 hours.

Is Rio Maunabo at Lizas rising or falling?

Up 0.07 ft over the last 24 hours. Down 0.68 ft over the last 7 days.

Is the level of Rio Maunabo at Lizas normal?

Normal for mid-October. Compared with 30 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:50090500 (Agency page)
Coordinates
18.02722, -65.94000 (WGS84)
Vertical datum
PRVD02
Update interval
every 15 minutes
Licence
Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Water level 3.72 ft 2026-10-18 23:30 Provisional
Flow 4.4 cfs 2026-10-18 23:30 Provisional

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How to cite

U.S. Geological Survey: Rio Maunabo at Lizas (usgs:50090500). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/puerto-rico/rio-maunabo-at-lizas

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.