Watch on 53 km near Ratnapura
Around Ratnapura, km 0–53.
It starts where you set off; you are through it by Tue 10:45.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
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.
- Ratnapura
Watchkm 0–53 - Haldummulla to Nuwara Eliya
Not listedkm 53–141
Alert on 54 km between Kiriella and Ginigathhena
Around Eheliyagoda and Dehiowita, km 23–63, km 87–105.
Also: Watch on 107 km between Ratnapura and Nuwara Eliya
You reach it about Tue 09:20, 40 min after leaving, and are through it by Tue 11:40.
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.
- Ratnapura to Kiriella
Watchkm 0–23 - Eheliyagoda
Alertkm 23–46 - near Dehiowita
Watchkm 46–49 - Dehiowita
Alertkm 49–62 - Yatiyantota to Kithulgala
Watchkm 62–87 - Ginigathhena
Alertkm 87–104 - Nawalapitiya to Kothmale
Watchkm 104–161 - Nuwara Eliya
Not listedkm 161–169
Alert on 27 km between Eheliyagoda and Yatiyantota
Around Eheliyagoda and Dehiowita, km 28–56.
Also: Watch on 110 km between Ratnapura and Nawalapitiya
You reach it about Tue 09:40, 50 min after leaving, and are through it by Tue 10:30.
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.
- Ratnapura
Watchkm 0–29 - Eheliyagoda to Dehiowita
Alertkm 29–56 - Yatiyantota to Nawalapitiya
Watchkm 56–137 - Talawakele to Nuwara Eliya
Not listedkm 137–175
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 Ratnapura–Nuwara Eliya road
The fastest road we know from Ratnapura to Nuwara Eliya is 141 km, about 4 h 40 min, via Haldummulla, Bogahakumbura.
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, 03:30. Checked Tue 10 Nov, 08:50.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Ratnapura | Watch | 0 |
| Balangoda | Watch | 36 |
Rain on route
×Light rain, up to 9.4 mm in 24 h
Rain gauges near your route
Key
- 1 Ratnapura, 8.3 mm, light rain
- 8 Samanala Wawa, 0 mm, dry
- 16 Nuwara Eliya, 9.4 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 Ratnapura, Balangoda, Imbulpe, Nuwara Eliya.
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 Ratnapura, Balangoda, Imbulpe, 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 Ratnapura, Balangoda, Imbulpe, 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 Ratnapura, Badulla 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 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)
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°C.
- Nuwara Eliya: Showers or thundershowers after 1.00p.m. Max 22°C, min 13°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 · Kalu Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kalu Ganga: Rare here (1–2 days a month)
Kalu Ganga · Walawe Ganga · Mahaweli Ganga
River basins along this road
- km 0–37 · Kalu Ganga basin
- km 37–95 · Walawe Ganga basin
- km 95–141 · Mahaweli Ganga basin
Satellite rain over these basins
- Kalu Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Walawe 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 4–6 · 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) - km 11 · 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 29 · Randi Oya (Kalu Ganga basin) · flows south-west
18 km² drain to this point - km 52 · Walawe Ganga · flows south-east
132 km² drain to this point - km 64 · Belihul Oya (Walawe Ganga basin) · flows south-east
50 km² drain to this point - km 67 · Kiriketi Oya (Walawe Ganga basin) · flows south-east
19 km² drain to this point - km 72 · Malape Oya (Walawe Ganga basin) · flows south-east
2.7 km² drain to this point - km 79 · Weli Oya (Walawe Ganga basin) · flows south-east
23 km² drain to this point - km 85 · Patana Oya (Walawe Ganga basin) · flows east
0.2 km² drain to this point - km 89 · Diyakana Oya (Walawe Ganga basin) · flows south-west
0.5 km² drain to this point - km 104 · Ellatotakanda Oya (Mahaweli Ganga basin) · flows north
28 km² drain to this point - km 110 · Kandapuhulpola Kandura (Mahaweli Ganga basin) · flows east
13 km² drain to this point
And 7 more unnamed streams on our map
Where this road runs beside a river
- km 4–5 · 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 |
|---|---|---|
| Eheliyagoda | Alert | 23 |
| Dehiovita | Alert | 44 |
| Ambagamuwa | Alert | 87 |
| Ratnapura | Watch | 0 |
| Kiriella | Watch | 6 |
| Seethawaka | Watch | 46 |
| Yatiyanthota | Watch | 62 |
| Pasbage Korale | Watch | 104 |
| Kothmale West | Watch | 112 |
| Kothmale East | Watch | 135 |
Rain on route
×Heavy rain, up to 113.5 mm in 24 h
Rain gauges near your route
Key
- 1 Ratnapura, 8.3 mm, light rain
- 4 Kiriella, 113.5 mm, heavy rain
- 19 Kithulgala, 35.9 mm, moderate rain
- 23 Nawalapitiya, 36.6 mm, moderate rain
- 24 Kotmale, 38.9 mm, moderate rain
- 28 Nuwara Eliya, 9.4 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 Kiriella, Dehiovita.
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 Ratnapura, Yatiyanthota, Ambagamuwa, 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 Ratnapura, Kiriella, Eheliyagoda, Ambagamuwa +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 Ratnapura, Kegalle, Colombo, Nuwara Eliya and Kandy.
- 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)
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°C.
- Nuwara Eliya: Showers or thundershowers after 1.00p.m. Max 22°C, min 13°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 · Kalu Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kuru Ganga: Rare here (1–2 days a month)
Kalu Ganga · Kelani Ganga · Mahaweli Ganga
River basins along this road
- km 0–38 · Kalu Ganga basin
- km 38–98 · Kelani Ganga basin
- km 99–169 · Mahaweli Ganga basin
Satellite rain over these basins
- Kalu Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kelani 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 1 · 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) - km 5 · 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 17 · 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 43 · Gatahatta oya (Kelani Ganga basin) · flows north-east
42 km² drain to this point - km 49 · Gatahatta oya (Kelani Ganga basin) · flows north
51 km² drain to this point - km 60 · Godellakumbura Ela (Kelani Ganga basin) · flows west
17 km² drain to this point - km 65–68 · 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 68 · 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 70 · 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 75 · 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 81 · 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 83 · 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 87 · 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 99–103 · 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 106 · 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 112 · 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 135–136 · 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 143 · Puna Oya (Mahaweli Ganga basin) · flows north-west
52 km² drain to this point - km 159 · Puna Oya (Mahaweli Ganga basin) · flows west
6.8 km² drain to this point
And 9 more unnamed streams on our map
Where this road runs beside a river
- km 99–100 · 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 |
|---|---|---|
| Eheliyagoda | Alert | 29 |
| Dehiovita | Alert | 35 |
| Ratnapura | Watch | 0 |
| Kiriella | Watch | 6 |
| Kuruvita | Watch | 14 |
| Yatiyanthota | Watch | 56 |
| Bulathkohupitiya | Watch | 65 |
| Ganga Ihala Korale | Watch | 96 |
| Pasbage Korale | Watch | 107 |
| Kothmale West | Watch | 127 |
Rain on route
×Moderate rain, up to 36.6 mm in 24 h
Rain gauges near your route
Key
- 1 Ratnapura, 8.3 mm, light rain
- 14 Nawalapitiya, 36.6 mm, moderate rain
- 18 Upper Kotmale, 15.9 mm, moderate rain
- 22 Nuwara Eliya, 9.4 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 Kiriella, Kuruvita, Dehiovita.
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 Ratnapura, Yatiyanthota, Bulathkohupitiya, Ganga Ihala 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 Ratnapura, Kiriella, Kuruvita, Eheliyagoda +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 Ratnapura, Kegalle, 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 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)
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°C.
- Nuwara Eliya: Showers or thundershowers after 1.00p.m. Max 22°C, min 13°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 · Kalu Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Sitawaka Gaga: Very rare here (a few days a year)
Kalu Ganga · Kelani Ganga · Maha Oya …
River basins along this road
- km 0–34 · Kalu Ganga basin
- km 34–97 · Kelani Ganga basin
- km 97–107 · Maha Oya basin
- km 107–175 · Mahaweli Ganga basin
Satellite rain over these basins
- Kalu Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kelani Ganga basin · Last 3 days: Rare here (1–2 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 1 · 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) - km 5 · 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 20 · Kuru Ganga (Kalu Ganga basin)
15 km² drain to this point - km 30 · N C (Kalu Ganga basin)
0.6 km² drain to this point - km 38–42 · Ambalanpitiya Oya (Kelani Ganga basin) · 4 crossings · flows north
70 km² drain to this point - km 43 · 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 48 · Maha Oya (Kelani Ganga basin) · flows south-west
23 km² drain to this point - km 53 · Godellakumbura Ela (Kelani Ganga basin) · flows west
17 km² drain to this point - km 59 · 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 60 · Welibela Oya (Kelani Ganga basin)
85 km² drain to this point - km 63 · We Oya (Kelani Ganga basin) · flows south-west
73 km² drain to this point - km 69–77 · Ritigaha Oya (Kelani Ganga basin) · 9 crossings · flows west
30 km² drain to this point - km 80 · Ketala Ela (Kelani Ganga basin) · flows south-east
27 km² drain to this point - km 81 · Uruletota Oya (Kelani Ganga basin) · 2 crossings · flows south-west
15 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 95 · We Oya (Kelani Ganga basin) · flows south-west
5.7 km² drain to this point - km 98 · Maha Oya · flows north
4.4 km² drain to this point - km 117 · 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 151–153 · 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 153–156 · 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 162 · Nanu Oya (Mahaweli Ganga basin) · flows west
67 km² drain to this point - km 169–171 · Nanu Oya (Mahaweli Ganga basin) · 3 crossings · flows north-west
24 km² drain to this point
And 22 more unnamed streams on our map
Where this road runs beside a river
- km 70–72 · beside the Ritigaha Oya
- km 74–77 · beside the Ritigaha Oya
- km 155–156 · beside the Dambagastalawa Oya
- km 169–170 · beside the Nanu 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.