Watch on 53 km near Ratnapura
Around Ratnapura, km 87–141.
You reach it about Tue 20:35, 2 h 40 min after leaving, and are through it by Tue 22:35.
This bulletin ends Tue 20:00, before you get there. The next one usually comes out 16:45–17:45: check it before you set off.
Since 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.
- Nuwara Eliya to Haldummulla
Not listedkm 0–88 - Ratnapura
Watchkm 88–141
Alert on 54 km between Ginigathhena and Kiriella
Around Ginigathhena and Dehiowita, km 64–82, km 106–146.
Also: Watch on 107 km between Nuwara Eliya and Ratnapura
You reach it about Tue 20:05, 2 h 10 min after leaving, and are through it by Tue 22:25.
This bulletin ends Tue 20:00, before you get there. The next one usually comes out 16:45–17:45: check it before you set off.
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.
- Nuwara Eliya
Not listedkm 0–8 - Kothmale to Nawalapitiya
Watchkm 8–65 - Ginigathhena
Alertkm 65–82 - Kithulgala to Yatiyantota
Watchkm 82–107 - Dehiowita
Alertkm 107–120 - near Dehiowita
Watchkm 120–123 - Eheliyagoda
Alertkm 123–146 - Kiriella to Ratnapura
Watchkm 146–169
Alert on 27 km between Yatiyantota and Eheliyagoda
Around Dehiowita and Eheliyagoda, km 119–146.
Also: Watch on 110 km between Nawalapitiya and Ratnapura
You reach it about Tue 22:10, 4 h 10 min after leaving, and are through it by Tue 22:55.
This bulletin ends Tue 20:00, before you get there. The next one usually comes out 16:45–17:45: check it before you set off.
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.
- Nuwara Eliya to Talawakele
Not listedkm 0–37 - Nawalapitiya to Yatiyantota
Watchkm 37–119 - Dehiowita to Eheliyagoda
Alertkm 119–146 - Ratnapura
Watchkm 146–175
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 Nuwara Eliya–Ratnapura road
The fastest road we know from Nuwara Eliya to Ratnapura is 141 km, about 4 h 40 min, via Bogahakumbura, Haldummulla.
Main roads on it: Ratunapura-Wellawaya Road (38 km), Keppetipola-Boralande-Haputale Road (27 km), Ratnapura-Wewelwatte Road (24 km).
We show 3 roads between them, fastest first.
DS divisions on this road
It passes through 7 DS divisions in 3 districts, in travel order:
Past NBRI bulletins
Most often listed on this road, in the 41 NBRI bulletins we have passed on since Sun 20 Sept: Ratnapura (35), Imbulpe (19), Balangoda (17).
A record of past bulletins, not a forecast. Not being listed doesn’t mean safe.
Steep terrain
About 15 km of it runs through steep terrain (slopes over 30° beside the road). The longest stretch is near Haldummulla.
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, 02:30. Checked Tue 10 Nov, 08:40.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Balangoda | Watch | 88 |
| Ratnapura | Watch | 104 |
Rain on route
×Light rain, up to 9.4 mm in 24 h
Rain gauges near your route
Key
- 1 Nuwara Eliya, 9.4 mm, light rain
- 9 Samanala Wawa, 0 mm, dry
- 16 Ratnapura, 8.3 mm, light rain
13 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 Nuwara Eliya, Imbulpe, Balangoda, Ratnapura.
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 Nuwara Eliya, Welimada, Haputale, Haldummulla +3 (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 Nuwara Eliya, Welimada, Haputale, Haldummulla +3 (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 Nuwara Eliya, Badulla and Ratnapura.
- 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 Ratnapura, Nuwara Eliya and Badulla 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 Ratnapura, Nuwara Eliya and Badulla 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)
- Nuwara Eliya: Showers or thundershowers after 1.00p.m. Max 22°C, min 13°C.
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°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 11 named rivers · 3 basins · Walawe Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kalu Ganga: Rare here (1–2 days a month)
Mahaweli Ganga · Walawe Ganga · Kalu Ganga
River basins along this road
- km 0–45 · Mahaweli Ganga basin
- km 46–104 · Walawe Ganga basin
- km 104–141 · Kalu Ganga basin
Satellite rain over these basins
- Walawe Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kalu Ganga basin · Last 3 days: Rare here (1–2 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 31 · Kandapuhulpola Kandura (Mahaweli Ganga basin) · flows east
13 km² drain to this point - km 37 · Ellatotakanda Oya (Mahaweli Ganga basin) · flows north
28 km² drain to this point - km 51 · Diyakana Oya (Walawe Ganga basin) · flows south-west
0.5 km² drain to this point - km 56 · Patana Oya (Walawe Ganga basin) · flows east
0.2 km² drain to this point - km 62 · Weli Oya (Walawe Ganga basin) · flows south-east
23 km² drain to this point - km 68 · Malape Oya (Walawe Ganga basin) · flows south-east
2.7 km² drain to this point - km 74 · Kiriketi Oya (Walawe Ganga basin) · flows south-east
19 km² drain to this point - km 77 · Belihul Oya (Walawe Ganga basin) · flows south-east
50 km² drain to this point - km 88 · Walawe Ganga · flows south-east
132 km² drain to this point - km 112 · Randi Oya (Kalu Ganga basin) · flows south-west
18 km² drain to this point - km 130 · Kalu Ganga
2.1 km² drain to this point
Rathnapura, an Irrigation Department gauge on this river (640 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): at least 12.4 mm in the 24 hours to 9 Nov, 08:30 (1 hourly reading missing); 0 mm in the 3 hours to 10 Nov, 08:01.
River level 4.98 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5.2, minor flood 7.5, major flood 9.5 m) - km 135–137 · Kalu Ganga · 4 crossings
199 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Rathnapura, an Irrigation Department gauge on this river (640 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): at least 12.4 mm in the 24 hours to 9 Nov, 08:30 (1 hourly reading missing); 0 mm in the 3 hours to 10 Nov, 08:01.
River level 4.98 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5.2, minor flood 7.5, major flood 9.5 m)
And 7 more unnamed streams on our map
Where this road runs beside a river
- km 136–137 · beside the Kalu 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 | 65 |
| Dehiovita | Alert | 107 |
| Eheliyagoda | Alert | 125 |
| Kothmale East | Watch | 8 |
| Kothmale West | Watch | 34 |
| Pasbage Korale | Watch | 57 |
| Yatiyanthota | Watch | 82 |
| Seethawaka | Watch | 120 |
| Kiriella | Watch | 146 |
| Ratnapura | Watch | 163 |
Rain on route
×Heavy rain, up to 113.5 mm in 24 h
Rain gauges near your route
Key
- 1 Nuwara Eliya, 9.4 mm, light rain
- 5 Kotmale, 38.9 mm, moderate rain
- 6 Nawalapitiya, 36.6 mm, moderate rain
- 10 Kithulgala, 35.9 mm, moderate rain
- 25 Kiriella, 113.5 mm, heavy rain
- 28 Ratnapura, 8.3 mm, light rain
22 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 1% of 3-day periods since 2000 in Dehiovita, Kiriella.
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 Nuwara Eliya, Kothmale East, Kothmale West, Pasbage Korale +3 (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 Nuwara Eliya, Kothmale East, Kothmale West, Pasbage Korale +4 (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 Nuwara Eliya, Kandy, Kegalle, Colombo and Ratnapura.
- 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, Ratnapura, Kandy, Nuwara Eliya and Colombo 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, Ratnapura, Kandy, Nuwara Eliya and Colombo 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)
- Nuwara Eliya: Showers or thundershowers after 1.00p.m. Max 22°C, min 13°C.
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°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 13 named rivers · 3 basins · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kuru Ganga: Rare here (1–2 days a month)
Mahaweli Ganga · Kelani Ganga · Kalu Ganga
River basins along this road
- km 0–71 · Mahaweli Ganga basin
- km 71–132 · Kelani Ganga basin
- km 132–169 · Kalu Ganga basin
Satellite rain over these basins
- Kelani Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kalu Ganga basin · Last 3 days: Rare here (1–2 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 10 · Puna Oya (Mahaweli Ganga basin) · flows west
6.8 km² drain to this point - km 27 · Puna Oya (Mahaweli Ganga basin) · flows north-west
52 km² drain to this point - km 34–35 · Pundul Oya (Mahaweli Ganga basin) · 2 crossings · flows north-west
458 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 58 · Mahaweli Ganga · 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)): 36.6 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:01.
River level 1.72 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 63 · Mahaweli Ganga · flows east
72 km² drain to this point
Nawalapitiya, an Irrigation Department gauge 4.4 km downstream (187 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 36.6 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:01.
River level 1.72 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 66–70 · Mahaweli Ganga · 5 crossings · flows east
14 km² drain to this point
Nawalapitiya, an Irrigation Department gauge 8.7 km downstream (187 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 36.6 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:01.
River level 1.72 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 82 · 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)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 86 · 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 88 · 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 94 · 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)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 99 · 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 101–104 · Kelani Ganga · 2 crossings · flows south-west
542 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 14.7 km upstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 101 · Madelle Oya (Kelani Ganga basin) · flows north
542 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 109 · Godellakumbura Ela (Kelani Ganga basin) · flows west
17 km² drain to this point - km 121 · Gatahatta oya (Kelani Ganga basin) · flows north
51 km² drain to this point - km 126 · Gatahatta oya (Kelani Ganga basin) · flows north-east
42 km² drain to this point - km 153 · Kuru Ganga (Kalu Ganga basin)
1,267 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 164 · Maha Ela (Kalu Ganga basin) · flows south-east
699 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 168 · Katugas Ela (Kalu Ganga basin) · flows south-west
657 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
And 9 more unnamed streams on our map
Where this road runs beside a river
- km 69–70 · 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 |
|---|---|---|
| Dehiovita | Alert | 119 |
| Eheliyagoda | Alert | 139 |
| Kothmale West | Watch | 37 |
| Pasbage Korale | Watch | 48 |
| Ganga Ihala Korale | Watch | 68 |
| Bulathkohupitiya | Watch | 79 |
| Yatiyanthota | Watch | 110 |
| Kuruvita | Watch | 146 |
| Kiriella | Watch | 160 |
| Ratnapura | Watch | 169 |
Rain on route
×Moderate rain, up to 36.6 mm in 24 h
Rain gauges near your route
Key
- 1 Nuwara Eliya, 9.4 mm, light rain
- 6 Upper Kotmale, 15.9 mm, moderate rain
- 9 Nawalapitiya, 36.6 mm, moderate rain
- 23 Ratnapura, 8.3 mm, light rain
19 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 1% of 3-day periods since 2000 in Dehiovita, Kuruvita, Kiriella.
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 Nuwara Eliya, Thalawakelle, Kothmale West, Pasbage Korale +4 (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 Nuwara Eliya, Thalawakelle, Kothmale West, Pasbage Korale +6 (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 Nuwara Eliya, Kandy, Kegalle and Ratnapura.
- 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, Ratnapura, Kandy 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, Ratnapura, Kandy 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)
- Nuwara Eliya: Showers or thundershowers after 1.00p.m. Max 22°C, min 13°C.
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°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 18 named rivers · 4 basins · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Sitawaka Gaga: Very rare here (a few days a year)
Mahaweli Ganga · Maha Oya · Kelani Ganga …
River basins along this road
- km 0–68 · Mahaweli Ganga basin
- km 68–78 · Maha Oya basin
- km 78–141 · Kelani Ganga basin
- km 141–175 · Kalu Ganga basin
Satellite rain over these basins
- Kelani Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kalu Ganga basin · Last 3 days: Rare here (1–2 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 4–6 · Nanu Oya (Mahaweli Ganga basin) · 3 crossings · flows north-west
24 km² drain to this point - km 13 · Nanu Oya (Mahaweli Ganga basin) · flows west
67 km² drain to this point - km 19–22 · Dambagastalawa Oya (Mahaweli Ganga basin) · 5 crossings · flows north
211 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
irr-calidonia, an Irrigation Department gauge 5.4 km upstream (186 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): no report.
River level: no current data - km 22–24 · Kotmale Oya (Mahaweli Ganga basin) · 4 crossings · flows west
303 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 58 · Mahaweli Ganga · flows north-east
145 km² drain to this point
Nawalapitiya, an Irrigation Department gauge 0.3 km upstream (187 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 36.6 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:01.
River level 1.72 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 77 · Maha Oya · flows north
4.4 km² drain to this point - km 80 · We Oya (Kelani Ganga basin) · flows south-west
5.7 km² drain to this point - km 87–88 · Uruletota Oya (Kelani Ganga basin) · 2 crossings · flows west
7.0 km² drain to this point - km 94 · Uruletota Oya (Kelani Ganga basin) · 2 crossings · flows south-west
15 km² drain to this point - km 95 · Ketala Ela (Kelani Ganga basin) · flows south-east
27 km² drain to this point - km 98–106 · Ritigaha Oya (Kelani Ganga basin) · 9 crossings · flows west
30 km² drain to this point - km 112 · We Oya (Kelani Ganga basin) · flows south-west
73 km² drain to this point - km 115 · Welibela Oya (Kelani Ganga basin)
85 km² drain to this point - km 116 · Kelani Ganga · flows north
547 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 17.5 km upstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 122 · Godellakumbura Ela (Kelani Ganga basin) · flows west
17 km² drain to this point - km 127 · Maha Oya (Kelani Ganga basin) · flows south-west
23 km² drain to this point - km 132 · Sitawaka Gaga (Kelani Ganga basin) · flows west
300 km² drain to this point · rain over that area, Last 3 days: Very rare here (a few days a year)
Deraniyagala (Irrigation Dept), an Irrigation Department gauge 9.9 km upstream (162 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): at least 116.7 mm in the 24 hours to 9 Nov, 08:30 (2 hourly readings missing); 0 mm in the 3 hours to 10 Nov, 08:02.
River level 1.15 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 4.8, minor flood 5.8, major flood 7 m) - km 133–137 · Ambalanpitiya Oya (Kelani Ganga basin) · 4 crossings · flows north
70 km² drain to this point - km 145 · N C (Kalu Ganga basin)
0.6 km² drain to this point - km 155 · Kuru Ganga (Kalu Ganga basin)
15 km² drain to this point - km 170 · Maha Ela (Kalu Ganga basin) · flows south-east
699 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 174 · Katugas Ela (Kalu Ganga basin) · flows south-west
657 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
And 22 more unnamed streams on our map
Where this road runs beside a river
- km 5–6 · beside the Nanu Oya
- km 19–20 · beside the Dambagastalawa Oya
- km 98–101 · beside the Ritigaha Oya
- km 103–105 · beside the Ritigaha Oya
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.