Rio Grande De Manati at Highway 155 near Morovis water level

Name: Rio Grande De Manati at Highway 155 near Morovis water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Rio Grande De Manati, Puerto Rico, United States

Directions

Very low for late October

Water level

2.96ft Down 0.16 ft over the last 24 hours

Measured Oct 21, 2026, 05:15 AM AST (1 hour ago)

Flow: 30.1 cfs

History

7 days 30 days 1 year Years compared

20252026

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

What this means

Low water at Rio Grande De Manati at Highway 155 near Morovis: the gauge reads 2.96 ft, far below normal for late October.

The median for late October is 3.20 ft, based on 9 years of readings, so the river stage is 0.24 ft below typical. It is 19.04 ft below the flood stage of 22.00 ft. On the same day last year the reading was 3.05 ft, a difference of −0.09 ft.

It is still going down, by 0.16 ft over the past 24 hours. Without real rain upstream, that is unlikely to change quickly.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 9 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 3.20 ft0.24 ft below the median for this date
Normal for this date: 3.04 ft – 3.53 ft8 years in 10 fall in this range (9 years of records)
Same day last year: 3.05 ft−0.09 ft
Lowest and highest in 30 days: 2.77 ft – 3.95 ft
Lowest and highest in 12 months: 2.79 ft – 4.86 ft

Paddling and fishing conditions

At low levels, plan for shorter paddling trips and expect to walk your boat through a few shoals.

For reference, flood stage is 22.00 ft.

What happens at each level

25.00 ft: Flood water will begin to reach the inside of a restaurant just downstream of the gage (Puente Licenciado Baltasar Corrado, PR-155). The yard of a house to the other side of the river will be flooded as well, leaving the local roads impassable. Operations to the nearby PRASA facility could be impacted too.
24.00 ft: The river will overflow along the parking space of a restaurant just downstream of the gage (Puente Licenciado Baltasar Corrado, PR-155). There is also a PRASA water facility next to the restaurant that could be impacted as well.
2.96 ft: Right now

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

Weather at the gauge

Rain in the last 3 days: 0.38 in. Rain that falls upstream can take hours or days to show up at a river gauge.

21 Wed 89° 71° 0.03 in, 75% Wind 5 mph

22 Thu 88° 73° 0.03 in, 75% Wind 4 mph

23 Fri 87° 73° 0.05 in, 76% Wind 5 mph

24 Sat 89° 74° 0.04 in, 68% Wind 9 mph

25 Sun 90° 73° – Wind 7 mph

26 Mon 87° 74° 0.08 in, 76% Wind 7 mph

27 Tue 91° 73° – Wind 4 mph

Forecast: Open-Meteo

Sunrise 06:22 AM Sunset 06:00 PM Daylight 11 hr, 38 min Waxing gibbous 76%

Map

Other gauges on the Rio Grande De Manati

Gauge	Level	Compared with normal	24 hours	Distance
Rio Grande De Manati at CialesRiver gauge, Rio Grande De Manati	2.49 ft	Normal	−0.37 ft	3.7 mi
Rio Grande De Manati near ManatiRiver gauge, Rio Grande De Manati	10.88 ft	Normal	−0.56 ft	9 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Rio Bauta near OrocovisRiver gauge, Rio Bauta	3.76 ft	Very low	−0.42 ft	5.3 mi
Rio Corozal at CorozalRiver gauge, Rio Corozal	4.53 ft	Normal	−0.04 ft	7 mi
Rio Cibuco at Vega BajaRiver gauge, Rio Cibuco	4.99 ft	Normal	+0.34 ft	10 mi
Rio Usabon at Highway 162 near BarranquitasRiver gauge, Rio Usabon	2.96 ft	Low	−0.01 ft	12 mi
Rio De La Plata below La Plata DamsiteRiver gauge, Rio De La Plata	6.95 ft	Very low	+0.08 ft	12 mi
Rio Saliente at Coabey near JayuyaRiver gauge, Rio Saliente	3.11 ft	Low	−0.03 ft	12 mi
Rio Guadiana near Guadiana, NaranjitoRiver gauge, Rio Guadiana	1.62 ft	Very low	+0.02 ft	12 mi
Rio Toa Vaca above Lago Toa VacaRiver gauge, Rio Toa Vaca	2.15 ft	Very low	−0.53 ft	12 mi

Questions and answers

Is the Rio Grande De Manati at Highway 155 near Morovis higher than last year?

No, it is 0.09 ft lower than on the same day last year, when the reading was 3.05 ft.

What is flood stage for the Rio Grande De Manati at Highway 155 near Morovis?

The official flood stage is 22.00 ft. The level is currently 19.04 ft below it.

What is a normal level for the Rio Grande De Manati at Highway 155 near Morovis in late October?

The median for late October is 3.20 ft. In 8 years out of 10 the reading falls between 3.04 ft and 3.53 ft, based on 9 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 Grande De Manati at Highway 155 near Morovis today?

On Oct 21, 2026, 05:15 AM AST, the water level was 2.96 ft. Down 0.16 ft over the last 24 hours.

Is Rio Grande De Manati at Highway 155 near Morovis rising or falling?

Down 0.16 ft over the last 24 hours. Up 0.07 ft over the last 7 days.

Is the level of Rio Grande De Manati at Highway 155 near Morovis normal?

Very low for late October. Compared with 9 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:50031000 (Agency page)
Coordinates: 18.29944, -66.41000 (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

Parameter	Last value	Time (UTC)	Quality
Water level	2.96 ft	2026-10-21 09:15	Provisional
Flow	30.1 cfs	2026-10-21 09:15	Provisional

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How to cite

U.S. Geological Survey: Rio Grande De Manati at Highway 155 near Morovis (usgs:50031000). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/puerto-rico/rio-grande-de-manati-at-highway-155-near-morovis

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