Canal Principal Diversion below Forebay, Isabela water level

Name: Canal Principal Diversion below Forebay, Isabela water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Canal gauge, Canal Principal Diversion, Puerto Rico, United States

Directions

High for mid-October

Water level

5.22ft Steady over the last 24 hours

Measured Oct 19, 2026, 05:30 AM AST (1 hour ago)

Flow: 29.3 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The gauge at Canal Principal Diversion below Forebay, Isabela shows 5.22 ft, above normal for mid-October.

That puts it 0.10 ft above the median of 5.12 ft for mid-October, based on 11 years of readings. A year ago it stood at 5.19 ft (+0.03 ft).

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 5.16 ft and 5.23 ft.

Compared with 11 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 5.12 ft0.10 ft above the median for this date
Normal for this date: 3.82 ft – 5.22 ft8 years in 10 fall in this range (11 years of records)
Same day last year: 5.19 ft+0.03 ft
Lowest and highest in 30 days: 5.16 ft – 5.23 ft
Lowest and highest in 12 months: 4.18 ft – 5.26 ft

Weather at the gauge

Rain in the last 3 days: 0.27 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 86° 74° 0.13 in, 100% Wind 9 mph

18 Sun 86° 71° 0.06 in, 100% Wind 5 mph

19 Mon 86° 72° 0.13 in, 100% Wind 7 mph

20 Tue 86° 72° 0.25 in, 100% Wind 6 mph

21 Wed 86° 71° 0.12 in, 76% Wind 6 mph

22 Thu 87° 70° 0.05 in, 84% Wind 7 mph

23 Fri 87° 73° 0.24 in, 61% Wind 7 mph

Forecast: Open-Meteo

Sunrise 06:24 AM Sunset 06:04 PM Daylight 11 hr, 40 min First quarter 58%

Map

Other gauges on the Canal Principal Diversion

Gauge	Level	Compared with normal	24 hours	Distance
Canal Principal Diversion above Lago GuerreroCanal gauge, Canal Principal Diversion	37.3 cfs	Very high	+3.8 cfs	3.7 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Canal De Moca above Lago Regulador E13 IsabelaCanal gauge, Canal De Moca	1.79 ft	Normal	+0.01 ft	1.1 mi
Canal De Aguadilla above Lago Ramey, AguadillaCanal gauge, Canal De Aguadilla	1.68 ft	Normal	+0.14 ft	7 mi
Rio Guajataca below Lago GuajatacaRiver gauge, Rio Guajataca	7.73 ft	Very high	+2.56 ft	7 mi
Canal De Derivacion at Lago De GuajatacaCanal gauge, Canal De Derivacion	3.40 ft	Normal	−0.01 ft	7 mi
Rio Culebrinas at Highway 404 near MocaRiver gauge, Rio Culebrinas	10.52 ft	Normal	+0.17 ft	9 mi
Rio Culebrinas at Margarita Damsite near AguadaRiver gauge, Rio Culebrinas	11.80 ft	Very high	+0.73 ft	10 mi
Rio Grande De Anasco near San SebastianRiver gauge, Rio Grande De Anasco	3.99 ft	Normal	+0.94 ft	13 mi
Rio Camuy near BayaneyRiver gauge, Rio Camuy	6.17 ft	High	+0.55 ft	13 mi

Questions and answers

How does the Canal Principal Diversion below Forebay, Isabela compare with last year?

It is 0.03 ft higher than on the same day last year, when the reading was 5.19 ft.

What is a normal level for the Canal Principal Diversion below Forebay, Isabela in mid-October?

The median for mid-October is 5.12 ft. In 8 years out of 10 the reading falls between 3.82 ft and 5.22 ft, based on 11 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 Canal Principal Diversion below Forebay, Isabela today?

On Oct 19, 2026, 05:30 AM AST, the water level was 5.22 ft. Steady over the last 24 hours.

Is Canal Principal Diversion below Forebay, Isabela rising or falling?

Steady over the last 24 hours. Steady over the last 7 days.

Is the level of Canal Principal Diversion below Forebay, Isabela normal?

High for mid-October. Compared with 11 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.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:182743067004200 (Agency page)
Coordinates: 18.46204, -67.01168 (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	5.22 ft	2026-10-19 09:30	Provisional
Flow	29.3 cfs	2026-10-19 09:30	Provisional

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How to cite

U.S. Geological Survey: Canal Principal Diversion below Forebay, Isabela (usgs:182743067004200). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/puerto-rico/canal-principal-diversion-below-forebay-isabela

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