Alert on 16 km between Nawalapitiya and Watawala
Around Ginigathhena and Watawala, km 126–144.
Also: Watch on 59 km between Gampola and Hatton
You reach it about Tue 16:05, 3 h 30 min after leaving, and are through it by Tue 16:40.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
Since the rainfall within the past 24 hours has exceeded 100 mm, if the rains continue, be on alert on the possibility of landslides, slope failures, rock falls, cut failures and ground subsidence, being ready to evacuate to a safe location if the need arises.
- Dambulla to Madawala
Not listedkm 0–79 - Gampola to Nawalapitiya
Watchkm 79–127 - Ginigathhena to Watawala
Alertkm 127–143 - Hatton
Watchkm 143–155
Alert on 16 km between Nawalapitiya and Watawala
Around Ginigathhena and Watawala, km 139–156.
Also: Watch on 74 km between Galagedara and Hatton
You reach it about Tue 16:30, 3 h 50 min after leaving, and are through it by Tue 17:05.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
Since the rainfall within the past 24 hours has exceeded 100 mm, if the rains continue, be on alert on the possibility of landslides, slope failures, rock falls, cut failures and ground subsidence, being ready to evacuate to a safe location if the need arises.
- Dambulla to Mawathagama
Not listedkm 0–73 - Galagedara
Watchkm 73–80 - Hedeniya
Not listedkm 80–85 - Gampola to Nawalapitiya
Watchkm 85–139 - Ginigathhena to Watawala
Alertkm 139–156 - Hatton
Watchkm 156–168
Alert on 31 km near Kithulgala
km 142–174.
Also: Watch on 53 km between Kegalle and Hatton
You reach it about Tue 16:10, 3 h 30 min after leaving, and are through it by Tue 17:15.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
Since the rainfall within the past 24 hours has exceeded 100 mm, if the rains continue, be on alert on the possibility of landslides, slope failures, rock falls, cut failures and ground subsidence, being ready to evacuate to a safe location if the need arises.
- Dambulla to Polgahawela
Not listedkm 0–88 - Kegalle
Watchkm 88–92 - between Kegalle and Kotiyakumbura
Not listedkm 92–109 - Kotiyakumbura to Kithulgala
Watchkm 109–143 - near Kithulgala
Alertkm 143–174 - Dickoya to Hatton
Watchkm 174–188
Before you go
We don’t know about road closures or damage. Be cautious on the way, especially in the hills in rain.
About the Dambulla–Hatton road
The fastest road we know from Dambulla to Hatton is 156 km, about 4 h 30 min, via Naula, Madawala.
Main roads on it: Kandy-Jaffna Road (45 km), Hatton Road (17 km), Gampola-Nawalapitiya Road (15 km).
We show 3 roads between them, fastest first.
DS divisions on this road
It passes through 17 DS divisions in 3 districts, in travel order:
- Dambulla
- Naula
- Pallepola
- Matale
- Yatawatta
- Ukuwela
- Pathadumbara
- Kundasale
- Kandy Four Gravets & Gangawata Korale
- Harispattuwa
- Yatinuwara
- Udunuwara
- Udapalatha
- Ganga Ihala Korale
- Pasbage Korale
- Ambagamuwa
- Norwood
Past NBRI bulletins
Most often listed on this road, in the 41 NBRI bulletins we have passed on since Sun 20 Sept: Yatinuwara (27), Ambagamuwa (23), Udunuwara (20).
A record of past bulletins, not a forecast. Not being listed doesn’t mean safe.
Steep terrain
About 4 km of it runs through steep terrain (slopes over 30° beside the road). The longest stretch is between Ginigathhena and Watawala.
Terrain beside the road, from a satellite elevation model: not the road’s gradient and not a landslide hazard rating.
How to read this
- Not an official service. NBRI’s warnings are passed on as issued.
- Rain levels compare each division with its own satellite record since 2000. Satellites can miss heavy local downpours.
- Gauge sources: Department of Meteorology and Irrigation Department gauge readings, passed on as published. Met gauge sites are approximate. Compared with each division's own satellite record since 2000. This is not a warning and does not replace NBRI's levels. Satellites can miss heavy local downpours, so it never means a road is safe. Satellite data up to 10 Nov, 07:30. Checked Tue 10 Nov, 12:45.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Ambagamuwa | Alert | 127 |
| Yatinuwara | Watch | 79 |
| Udunuwara | Watch | 83 |
| Udapalatha | Watch | 99 |
| Ganga Ihala Korale | Watch | 105 |
| Pasbage Korale | Watch | 114 |
| Norwood | Watch | 143 |
Rain on route
×Fairly heavy rain, up to 90 mm in 24 h
Rain gauges near your route
Key
- 2 Bowatenna, 55.5 mm, fairly heavy rain
- 6 Ukuwela, 20 mm, moderate rain
- 9 Katugastota, 9 mm, light rain
- 11 Peradeniya, 16 mm, moderate rain
- 16 Nawalapitiya, 77.2 mm, fairly heavy rain
- 20 Norton, 90 mm, fairly heavy rain
16 gauges not reporting.
Gauge coverage: most of the route.
NBRI's warning stays in force after rain eases.
Satellite estimate
- Last 3 days: among the wettest 5% of 3-day periods since 2000 in Ukuwela, Pathadumbara, Kundasale, Kandy Four Gravets & Gangawata Korale +8.
Rain outlook (computer model) · Next day: Chance of a rare wet day
- Next day: a chance of a wet day of the kind that comes about 1–2 days a month in Dambulla, Naula, Pallepola, Matale +13 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 11 Nov, 05:30)
- Next 3 days: a chance of a wet day of the kind that comes about 1–2 days a month in Dambulla, Naula, Pallepola, Matale +13 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 13 Nov, 05:30)
- "Not signalled" never means dry or safe. This is a computer model, not a warning, and it never changes NBRI's levels. Like the satellite, it reads hill-country rain low and can miss heavy local downpours.
- ECMWF ensemble forecast (open data, CC BY 4.0), run 9 Nov, 17:30, compared with each division's own satellite record.
Weather forecast (Met Dept)
×No advisory for this road
- No Department of Meteorology advisory is in force for Matale, Kandy and Nuwara Eliya.
- Forecast issued 10 Nov, 05:30
- Showers or thundershowers will occur at times in the Northern province and in Trincomalee district.
- Showers or thundershowers will occur elsewhere in the island after 1.00 p.m.
- Covers Kandy, Matale and Nuwara Eliya on this road: Heavy falls above 100mm are likely at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle and Matara districts.
- Showers may occur in the coastal areas of the Southern Province during the morning.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Covers Kandy, Matale and Nuwara Eliya on this road: Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle, Matara and Kurunegala districts during the early hours of the morning.
- Forecast for the main cities, Tuesday, 10 November 2026 (issued 9 Nov, 16:00)
- Kandy: Showers or thundershowers after 1.00p.m. Max 30°C, min 24°C.
- A forecast never lowers or replaces the NBRI landslide warning above.
- Forecast and advisories by the Department of Meteorology, Sri Lanka, as issued. LankaWatch is not an official service.
Rivers and catchments
×Crosses 7 named rivers · 2 basins · rain upstream of Mahaweli Ganga: Rare here (1–2 days a month)
Kala Oya · Mahaweli Ganga
River basins along this road
- km 0–15 · Kala Oya basin
- km 15–156 · Mahaweli Ganga basin
Satellite rain over these basins
- Mahaweli Ganga basin · Last 3 days: Unusual here (3 days a month)
A whole-basin satellite average against that basin’s own record since 2000, not the area upstream of any one point. Satellites under-read hill rain. Not a warning.
Where this road crosses a river or stream
- km 22 · Nalanda Oya (Mahaweli Ganga basin) · flows north-east
131 km² drain to this point - km 29 · Heenganga Ela (Mahaweli Ganga basin) · flows east
10 km² drain to this point - km 54 · Sudu Ganga (Mahaweli Ganga basin) · flows north
17 km² drain to this point - km 61 · Dan Oya (Mahaweli Ganga basin) · flows south
4.4 km² drain to this point - km 63 · Sudu Ganga (Mahaweli Ganga basin) · flows south-west
1.0 km² drain to this point - km 72–73 · Mahaweli Ganga · 2 crossings · flows north
1,194 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Peradeniya, an Irrigation Department gauge 9.4 km upstream (1,143 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 16 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 12:01.
River level 3.2 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5, minor flood 7, major flood 9 m) - km 78–85 · Mahaweli Ganga · 7 crossings · flows north-west
1,068 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Peradeniya, an Irrigation Department gauge 2.9 km downstream (1,143 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 16 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 12:01.
River level 3.2 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5, minor flood 7, major flood 9 m) - km 89–91 · Geli Oya (Mahaweli Ganga basin) · 2 crossings · flows north-east
12 km² drain to this point - km 89 · Mada Ela (Mahaweli Ganga basin) · flows north-west
20 km² drain to this point - km 115–120 · Mahaweli Ganga · 4 crossings · flows north
187 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Nawalapitiya, an Irrigation Department gauge 1.2 km upstream (187 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 77.2 mm in the 24 hours to 10 Nov, 08:30 (Fairly heavy); 0 mm in the 3 hours to 10 Nov, 12:01.
River level 1.62 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 126–144 · Mahaweli Ganga · 17 crossings · flows north-west
25 km² drain to this point - km 149–150 · Mahaweli Ganga · 2 crossings · flows north-west
11 km² drain to this point
And 8 more unnamed streams on our map
Where this road runs beside a river
- km 72–74 · beside the Mahaweli Ganga
- km 114–115 · beside the Mahaweli Ganga
- km 132–133 · beside the Mahaweli Ganga
- km 133–135 · beside the Mahaweli Ganga
- km 135–138 · beside the Mahaweli Ganga
- km 141–142 · beside the Mahaweli Ganga
- km 149–151 · beside the Mahaweli Ganga
Rivers and basins come from our own map of Sri Lanka’s river network. Flow direction, where shown, is worked out from the height of the land. This is orientation only, not a flood warning.
The area draining to a crossing is worked out from a terrain model (about 90 m cells) and is approximate. The rain over it is the satellite average for that same area, against its own record since 2000. Areas under about 150 km² are smaller than the satellite can see, so they show no rain.
River levels are the Irrigation Department’s own readings at its gauge, against its own thresholds. This is not a flood warning: flood warnings come from the Irrigation Department and DMC.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Ambagamuwa | Alert | 139 |
| Thumpane | Watch | 73 |
| Yatinuwara | Watch | 85 |
| Udunuwara | Watch | 96 |
| Udapalatha | Watch | 108 |
| Ganga Ihala Korale | Watch | 123 |
| Pasbage Korale | Watch | 127 |
| Norwood | Watch | 156 |
Rain on route
×Fairly heavy rain, up to 90 mm in 24 h
Rain gauges near your route
Key
- 10 Peradeniya, 16 mm, moderate rain
- 15 Nawalapitiya, 77.2 mm, fairly heavy rain
- 19 Norton, 90 mm, fairly heavy rain
18 gauges not reporting.
Gauge coverage: most of the route.
NBRI's warning stays in force after rain eases.
Satellite estimate
- Last 3 days: among the wettest 5% of 3-day periods since 2000 in Mawathagama, Pujapitiya, Thumpane, Harispattuwa +7.
Rain outlook (computer model) · Next day: Chance of a rare wet day
- Next day: a chance of a wet day of the kind that comes about 1–2 days a month in Dambulla, Galewela, Ibbagamuwa, Rideegama +11 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 11 Nov, 05:30)
- Next 3 days: a chance of a wet day of the kind that comes about 1–2 days a month in Dambulla, Galewela, Ibbagamuwa, Rideegama +11 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 13 Nov, 05:30)
- "Not signalled" never means dry or safe. This is a computer model, not a warning, and it never changes NBRI's levels. Like the satellite, it reads hill-country rain low and can miss heavy local downpours.
- ECMWF ensemble forecast (open data, CC BY 4.0), run 9 Nov, 17:30, compared with each division's own satellite record.
Weather forecast (Met Dept)
×No advisory for this road
- No Department of Meteorology advisory is in force for Matale, Kurunegala, Kandy and Nuwara Eliya.
- Forecast issued 10 Nov, 05:30
- Showers or thundershowers will occur at times in the Northern province and in Trincomalee district.
- Showers or thundershowers will occur elsewhere in the island after 1.00 p.m.
- Covers Kandy, Matale and Nuwara Eliya on this road: Heavy falls above 100mm are likely at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle and Matara districts.
- Showers may occur in the coastal areas of the Southern Province during the morning.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Covers Kandy, Matale, Nuwara Eliya and Kurunegala on this road: Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle, Matara and Kurunegala districts during the early hours of the morning.
- A forecast never lowers or replaces the NBRI landslide warning above.
- Forecast and advisories by the Department of Meteorology, Sri Lanka, as issued. LankaWatch is not an official service.
Rivers and catchments
×Crosses 10 named rivers · 4 basins · rain upstream of Mahaweli Ganga: Rare here (1–2 days a month)
Kala Oya · Deduru Oya · Mahaweli Ganga …
River basins along this road
- km 0–22 · Kala Oya basin
- km 22–79 · Deduru Oya basin
- km 79–101 · Mahaweli Ganga basin
- km 101–106 · Maha Oya basin
- km 106–168 · Mahaweli Ganga basin
Satellite rain over these basins
- Deduru Oya basin · Last 3 days: Unusual here (3 days a month)
- Mahaweli Ganga basin · Last 3 days: Unusual here (3 days a month)
- Maha Oya basin · Last 3 days: Unusual here (3 days a month)
A whole-basin satellite average against that basin’s own record since 2000, not the area upstream of any one point. Satellites under-read hill rain. Not a warning.
Where this road crosses a river or stream
- km 9 · Welamitiya Oya (Kala Oya basin) · flows west
17 km² drain to this point - km 11 · Mala Oya (Kala Oya basin) · flows north-west
39 km² drain to this point - km 30 · Kimbulwana Oya (Deduru Oya basin) · flows north-west
44 km² drain to this point - km 41 · Kuda Oya (Deduru Oya basin) · flows west
37 km² drain to this point - km 44 · Deduru Oya · flows north-west
123 km² drain to this point - km 55–58 · Kaspatu Oya (Deduru Oya basin) · 4 crossings · flows north-west
104 km² drain to this point - km 65 · Kaspatu Oya (Deduru Oya basin) · flows north-west
41 km² drain to this point - km 72–76 · Dik Oya (Deduru Oya basin) · 4 crossings · flows north-west
2.2 km² drain to this point - km 72 · Narankaha Ela (Deduru Oya basin) · flows south-west
16 km² drain to this point - km 94 · Nanu Oya (Mahaweli Ganga basin) · flows south-east
45 km² drain to this point - km 113 · Mahaweli Ganga · flows north-east
900 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Peradeniya, an Irrigation Department gauge 15.4 km downstream (1,143 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 16 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 12:01.
River level 3.2 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5, minor flood 7, major flood 9 m) - km 124–132 · Mahaweli Ganga · 6 crossings · flows north
187 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Nawalapitiya, an Irrigation Department gauge 1.2 km upstream (187 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 77.2 mm in the 24 hours to 10 Nov, 08:30 (Fairly heavy); 0 mm in the 3 hours to 10 Nov, 12:01.
River level 1.62 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 138–156 · Mahaweli Ganga · 17 crossings · flows north-west
25 km² drain to this point - km 162 · Mahaweli Ganga · 2 crossings · flows north-west
11 km² drain to this point
And 7 more unnamed streams on our map
Where this road runs beside a river
- km 56–57 · beside the Kaspatu Oya
- km 57–58 · beside the Kaspatu Oya
- km 75–77 · beside the Dik Oya
- km 127–128 · beside the Mahaweli Ganga
- km 144–145 · beside the Mahaweli Ganga
- km 145–147 · beside the Mahaweli Ganga
- km 147–150 · beside the Mahaweli Ganga
- km 153–154 · beside the Mahaweli Ganga
- km 161–163 · beside the Mahaweli Ganga
Rivers and basins come from our own map of Sri Lanka’s river network. Flow direction, where shown, is worked out from the height of the land. This is orientation only, not a flood warning.
The area draining to a crossing is worked out from a terrain model (about 90 m cells) and is approximate. The rain over it is the satellite average for that same area, against its own record since 2000. Areas under about 150 km² are smaller than the satellite can see, so they show no rain.
River levels are the Irrigation Department’s own readings at its gauge, against its own thresholds. This is not a flood warning: flood warnings come from the Irrigation Department and DMC.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Ambagamuwa | Alert | 143 |
| Kegalle | Watch | 88 |
| Yatiyanthota | Watch | 109 |
| Bulathkohupitiya | Watch | 114 |
| Norwood | Watch | 174 |
Rain on route
×Heavy rain, up to 125 mm in 24 h
Rain gauges near your route
Key
- 5 Kurunegala, 14.6 mm, moderate rain
- 9 Holombuwa, ≥ 3.9 mm, light rain or more (incomplete day)
- 14 Pambegama Tea Factory, 100.5 mm, heavy rain
- 17 Kithulgala, ≥ 52 mm, fairly heavy rain or more (incomplete day)
- 20 Laxapana, 92.8 mm, fairly heavy rain
- 22 Norton, 90 mm, fairly heavy rain
- 24 Castlereigh, 125 mm, heavy rain
18 gauges not reporting.
Gauge coverage: most of the route.
NBRI's warning stays in force after rain eases.
Satellite estimate
- Last 3 days: among the wettest 5% of 3-day periods since 2000 in Mallawapitiya, Kurunegala, Polgahawela, Rambukkana +6.
Rain outlook (computer model) · Next day: Chance of a rare wet day
- Next day: a chance of a wet day of the kind that comes about 1–2 days a month in Dambulla, Galewela, Ibbagamuwa, Mallawapitiya +9 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 11 Nov, 05:30)
- Next 3 days: a chance of a wet day of the kind that comes about 1–2 days a month in Dambulla, Galewela, Ibbagamuwa, Mallawapitiya +8 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 13 Nov, 05:30)
- "Not signalled" never means dry or safe. This is a computer model, not a warning, and it never changes NBRI's levels. Like the satellite, it reads hill-country rain low and can miss heavy local downpours.
- ECMWF ensemble forecast (open data, CC BY 4.0), run 9 Nov, 17:30, compared with each division's own satellite record.
Weather forecast (Met Dept)
×No advisory for this road
- No Department of Meteorology advisory is in force for Matale, Kurunegala, Kegalle and Nuwara Eliya.
- Forecast issued 10 Nov, 05:30
- Showers or thundershowers will occur at times in the Northern province and in Trincomalee district.
- Showers or thundershowers will occur elsewhere in the island after 1.00 p.m.
- Covers Kegalle, Matale and Nuwara Eliya on this road: Heavy falls above 100mm are likely at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle and Matara districts.
- Showers may occur in the coastal areas of the Southern Province during the morning.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Covers Kegalle, Matale, Nuwara Eliya and Kurunegala on this road: Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle, Matara and Kurunegala districts during the early hours of the morning.
- A forecast never lowers or replaces the NBRI landslide warning above.
- Forecast and advisories by the Department of Meteorology, Sri Lanka, as issued. LankaWatch is not an official service.
Rivers and catchments
×Crosses 19 named rivers · 5 basins · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Maha Oya: Rare here (1–2 days a month)
Kala Oya · Deduru Oya · Maha Oya …
River basins along this road
- km 0–22 · Kala Oya basin
- km 22–70 · Deduru Oya basin
- km 70–94 · Maha Oya basin
- km 95–187 · Kelani Ganga basin
- km 187–188 · Mahaweli Ganga basin
Satellite rain over these basins
- Kelani Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Deduru Oya basin · Last 3 days: Unusual here (3 days a month)
- Maha Oya basin · Last 3 days: Unusual here (3 days a month)
- Mahaweli Ganga basin · Last 3 days: Unusual here (3 days a month)
A whole-basin satellite average against that basin’s own record since 2000, not the area upstream of any one point. Satellites under-read hill rain. Not a warning.
Where this road crosses a river or stream
- km 9 · Welamitiya Oya (Kala Oya basin) · flows west
17 km² drain to this point - km 11 · Mala Oya (Kala Oya basin) · flows north-west
39 km² drain to this point - km 30 · Kimbulwana Oya (Deduru Oya basin) · flows north-west
44 km² drain to this point - km 48 · Deduru Oya · flows north-west
7.5 km² drain to this point - km 55 · Getuwana Ela (Deduru Oya basin) · flows north
2.5 km² drain to this point - km 58 · Magur Oya (Deduru Oya basin) · flows north-west
1.3 km² drain to this point - km 80 · Maha Oya · flows south-west
558 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 84 · Ambodeniya Ela (Maha Oya basin) · flows north-west
15 km² drain to this point - km 94 · Galigamuwa Oya (Maha Oya basin) · flows north-west
4.6 km² drain to this point - km 100 · Gurugoda Oya (Kelani Ganga basin) · flows west
119 km² drain to this point
Holombuwa, an Irrigation Department gauge 4.3 km downstream (154 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): at least 3.9 mm in the 24 hours to 10 Nov, 08:30 (1 hourly reading missing); 0 mm in the 3 hours to 10 Nov, 12:05.
River level 1.2 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 109 · Babaragaha Ela (Kelani Ganga basin) · flows west
6.9 km² drain to this point - km 110 · Haloluwa Ela (Kelani Ganga basin) · flows north-west
217 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 116 · Ritigaha Oya (Kelani Ganga basin) · 2 crossings · flows south
82 km² drain to this point - km 121 · We Oya (Kelani Ganga basin) · flows south-west
73 km² drain to this point - km 126 · Ekki Oya (Kelani Ganga basin) · flows west
537 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 131 · Kelani Ganga · flows west
506 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 8.9 km upstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): at least 52 mm in the 24 hours to 10 Nov, 08:30 (1 hourly reading missing); 0 mm in the 3 hours to 10 Nov, 12:02.
River level 2.2 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 137 · Bibili Oya (Kelani Ganga basin) · flows south
488 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 139 · Girankitte Oya (Kelani Ganga basin) · flows south-west
470 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 143 · Kelani Ganga · flows west
418 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 2 km downstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): at least 52 mm in the 24 hours to 10 Nov, 08:30 (1 hourly reading missing); 0 mm in the 3 hours to 10 Nov, 12:02.
River level 2.2 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 171–178 · Kehelgama Ganga (Kelani Ganga basin) · 7 crossings · flows north-west
148 km² drain to this point
And 10 more unnamed streams on our map
Where this road runs beside a river
- km 174–176 · beside the Kehelgama Ganga
- km 176–177 · beside the Kehelgama Ganga
Rivers and basins come from our own map of Sri Lanka’s river network. Flow direction, where shown, is worked out from the height of the land. This is orientation only, not a flood warning.
The area draining to a crossing is worked out from a terrain model (about 90 m cells) and is approximate. The rain over it is the satellite average for that same area, against its own record since 2000. Areas under about 150 km² are smaller than the satellite can see, so they show no rain.
River levels are the Irrigation Department’s own readings at its gauge, against its own thresholds. This is not a flood warning: flood warnings come from the Irrigation Department and DMC.
NBRI’s advice, as issued
×Watch · NBRI adviceSince the rainfall within the past 24 hours has exceeded 75mm, if the rain continues, be watchful on the possibility of landslides, slope failures, rock falls, cutting failures and ground subsidence.
NBRI, issued Mon 9 Nov, 20:00 · valid to Tue 10 Nov, 20:00