Will Katunayake flood in the next hour?

Katunayake flood risk right now: Alert. This is an estimate based on the Badalgama gauge on the Maha Oya (19 km away), which read 18.8 ft as of Tue, 27 Oct, 3:03 am (Sri Lanka time). In the next hour the Maha Oya at Badalgama could rise to about 18.9 ft (18.7–19.4 ft). This is a forecast for the river, not an official warning, and streets can flood before the river reaches a flood mark.

How is the flood risk for Katunayake worked out?

From the nearest river gauge ({gauge}, 19 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 Katunayake flooding?

Katunayake, Gampaha

Katunayake flood risk right now: Alert. This is an estimate based on the Badalgama gauge on the Maha Oya (19 km away), which read 18.8 ft as of Tue, 27 Oct, 3:03 am (Sri Lanka time).

Reading at 3:03 am · 27 min ago

Alert

18.8 ft

Next hour

River rising slowly

Next 24 hours

Risk stays high

Move valuables up, charge your phone

Experimental estimate. There is no river gauge in Katunayake; this uses Badalgama, 19 km away, plus rain at the town and official warnings.

Call 117 Gampaha DMC office

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

Irrigation Department has issued a flood warning for Gampaha
Maha Oya at Badalgama is 18.8 ft, rising (at alert level)
74 mm of rain in the last 24 hours
Water in Katunayake drains through canals into the river. When the river is high, rain can stay on the lowest ground near them.

Your river

Badalgama

Maha Oya · 19 km away

Alert18.8 ft3:03 am

Dunamale

Aththanagalu Oya · 23 km away

Minor flood15.4 ft

Is this right?

Each answer helps us improve the forecast for your area.

Based on: Badalgama gauge on the Maha Oya, 19 km away

Set your street's flood level

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

Rain in Katunayake

Heavy rain in the last 24 hours (74 mm). Moderate rain expected this afternoon, about 13 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.

Official flood map

In the Irrigation Department's maps of past floods (Aththanagalu Oya 2018), these Grama Niladhari divisions around Katunayake were partly or fully under water:

Evariwatta2018
Air Force Camp2018
Muthuwadiya2018

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 Katunayake flooding now?: Katunayake flood risk right now: Alert. This is an estimate based on the Badalgama gauge on the Maha Oya (19 km away), which read 18.8 ft as of Tue, 27 Oct, 3:03 am (Sri Lanka time).
Will Katunayake flood in the next hour?: Katunayake flood risk right now: Alert. This is an estimate based on the Badalgama gauge on the Maha Oya (19 km away), which read 18.8 ft as of Tue, 27 Oct, 3:03 am (Sri Lanka time). In the next hour the Maha Oya at Badalgama could rise to about 18.9 ft (18.7–19.4 ft). This is a forecast for the river, not an official warning, and streets can flood before the river reaches a flood mark.
How is the flood risk for Katunayake worked out?: From the nearest river gauge ({gauge}, 19 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.

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