How is the flood risk for Sammanthurai worked out?

From the nearest river gauge ({gauge}, 18 km away), recent and expected rain, the gauge's forecast and any official warning. It is an estimate for the town, not an official warning, and streets can flood before the river reaches a flood mark.

Where does this come from and how often does it update?

River readings come from the Department of Irrigation's gauges, roughly once an hour, and this page checks for new ones every minute. This site is independent and not an official warning service: follow the Disaster Management Centre and call 117 in an emergency.

Is Sammanthurai flooding?

Sammanthurai, Ampara

Sammanthurai flood risk right now: No estimate right now. This is an estimate based on the Ampara gauge on the Gal Oya (18 km away), which read 0.0 as of Tue, 27 Oct, 12:06 am (Sri Lanka time).

Reading at 12:06 am · 2 h ago

No estimate right now

We cannot estimate Sammanthurai right now: the nearest river gauge has no usable reading.

Details

How this estimate works

· Starts from the river gauge's own level and forecast, the same as the gauge page.
· Heavy rain here (50 mm in 6 hours or 100 mm in 24 hours) raises it by one step, never more.
· Your own street level, if you set one, and official warnings can raise it further.
· It never says flooding is happening: only a measurement can show that.

Why

Ampara does not publish flood levels, so the river cannot be judged here
54 mm of rain in the last 24 hours

Your river

Ampara

Gal Oya · 18 km away

No flood levels0.0012:06 am

Is this right?

Each answer helps us improve the forecast for your area.

Based on: Ampara gauge on the Gal Oya, 18 km away

Set your street's flood level

At what Ampara reading does water reach your street? Saved on this device only, never sent anywhere.

Rain in Sammanthurai

Heavy rain in the last 24 hours (54 mm). Moderate rain expected this afternoon, about 8 mm in the next 24 hours.

mm per hour

Tap or hover a bar to see that hour.

Rain map

Did the streets near you get water today?

Your answer helps us check our warnings. It is anonymous: we save only the town and your answer. Nobody sees single answers; we show only totals of 3 or more.

When? (optional)

River map

GaugeReservoirTap a gauge or reservoir for details.

Reservoirs upstream

Senanayake SamudrayaHolding

Official flood map

None of the Grama Niladhari divisions around Sammanthurai is in the Irrigation Department's maps of past floods on the Gal Oya (2016). Low spots can still flood.

This shows where a past flood reached, not a flood now. A bigger flood can go further.

Flood maps: Irrigation Department of Sri Lanka

Flood help and phone numbers

Common questions

Is Sammanthurai flooding now?: Sammanthurai flood risk right now: No estimate right now. This is an estimate based on the Ampara gauge on the Gal Oya (18 km away), which read 0.0 as of Tue, 27 Oct, 12:06 am (Sri Lanka time).
How is the flood risk for Sammanthurai worked out?: From the nearest river gauge ({gauge}, 18 km away), recent and expected rain, the gauge's forecast and any official warning. It is an estimate for the town, not an official warning, and streets can flood before the river reaches a flood mark.
Where does this come from and how often does it update?: River readings come from the Department of Irrigation's gauges, roughly once an hour, and this page checks for new ones every minute. This site is independent and not an official warning service: follow the Disaster Management Centre and call 117 in an emergency.

Gal Oya · Sources: Department of Irrigation gauges, Open-Meteo rain, Disaster Management Centre warnings.