Will Thawalama flood in the next hour?

Thawalama flood risk right now: Alert. This is an estimate based on the Thawalama gauge on the Gin Ganga (under 1 km away), which read 17.6 ft as of Tue, 27 Oct, 2:01 am (Sri Lanka time). In the next hour the Gin Ganga at Thawalama should stay about the same (17.3–17.9 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 Thawalama worked out?

From the nearest river gauge ({gauge}, under 1 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 Thawalama flooding?

Thawalama, Galle

Thawalama flood risk right now: Alert. This is an estimate based on the Thawalama gauge on the Gin Ganga (under 1 km away), which read 17.6 ft as of Tue, 27 Oct, 2:01 am (Sri Lanka time).

Reading at 2:01 am · 45 min ago

Alert

17.6 ft

Next hour

River steady

Next 24 hours

Risk stays high

Move valuables up, charge your phone

Experimental estimate from the Thawalama river gauge, plus rain at the town and official warnings.

Call 117 Galle 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 Gin Ganga
Gin Ganga at Thawalama is 17.6 ft, rising (at alert level)
55 mm of rain in the last 24 hours
33 mm of rain expected in the next 24 hours

Your river

Thawalama

Gin Ganga · under 1 km away

Alert17.6 ft2:01 am

Is this right?

Each answer helps us improve the forecast for your area.

Based on: Thawalama gauge on the Gin Ganga, under 1 km away

Set your street's flood level

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

Rain in Thawalama

Moderate rain in the last 24 hours (55 mm). Moderate rain expected this morning, about 33 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 (Gin Ganga 2017), these Grama Niladhari divisions around Thawalama were partly or fully under water:

Batahena2017
Thawalama North2017
Habarakada West2017
Habarakada East2017
Kudugalpala2017

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 Thawalama flooding now?: Thawalama flood risk right now: Alert. This is an estimate based on the Thawalama gauge on the Gin Ganga (under 1 km away), which read 17.6 ft as of Tue, 27 Oct, 2:01 am (Sri Lanka time).
Will Thawalama flood in the next hour?: Thawalama flood risk right now: Alert. This is an estimate based on the Thawalama gauge on the Gin Ganga (under 1 km away), which read 17.6 ft as of Tue, 27 Oct, 2:01 am (Sri Lanka time). In the next hour the Gin Ganga at Thawalama should stay about the same (17.3–17.9 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 Thawalama worked out?: From the nearest river gauge ({gauge}, under 1 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.

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