Leaving
Level 1 · WatchTue 10 Nov
Watch on 99 km between Pasyala and Kothmale
Around Warakapola and Kegalle, km 50–54, km 56–69, km 74–84 and 1 more.
You reach it about Tue 09:55, 1 h after leaving, and are through it by Tue 13:05.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
NBRI’s advice, as issued
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.
NBRI, issued Mon 9 Nov, 20:00 · valid to Tue 10 Nov, 20:00lankawatch.org
Your road · 212 km~5 h 50 min
NBRI WatchNot listedRiver crossingRain gaugeNo report
- Colombo to Pasyala
Not listedkm 0–56 - Warakapola
Watchkm 56–69 - between Warakapola and Kegalle
Not listedkm 69–74 - Kegalle
Watchkm 74–83 - near Kegalle
Not listedkm 83–88 - Gampola to Kothmale
Watchkm 88–164 - Ohiya (Horton Plains)
Not listedkm 164–212
LandslideWatch4 stretches · NBRI’s adviceRainModerate rain, up to 37.4 mm in 24 hLast 3 days, satellite: About 1–2 days a month are this wet hereWeatherShowers or thundershowers after 1.00p.mColombo 31° / 24° · Nuwara Eliya 22° / 13°Rivers17 crossingsDunamale: Minor flood level · steady · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kelani Ganga: Rare here (1–2 days a month)
Level 1 · WatchTue 10 Nov
Watch on 100 km between Ingiriya and Ratnapura
Around Ingiriya and Kiriella, km 52–153.
You reach it about Tue 09:50, 1 h after leaving, and are through it by Tue 13:05.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
NBRI’s advice, as issued
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.
NBRI, issued Mon 9 Nov, 20:00 · valid to Tue 10 Nov, 20:00lankawatch.org
Your road · 218 km~6 h 10 min
NBRI WatchNot listedRiver crossingRain gaugeNo report
- Colombo to Malabe
Not listedkm 0–52 - Ingiriya to Ratnapura
Watchkm 52–152 - Haldummulla to Ohiya (Horton Plains)
Not listedkm 152–217
LandslideWatch1 stretch · NBRI’s adviceRainHeavy rain, up to 113.5 mm in 24 hLast 3 days, satellite: Only a few days a year are this wet here · Last this wet in Kiriella: November 2025WeatherShowers or thundershowers after 1.00p.mColombo 31° / 24° · Ratnapura 33° / 23°Rivers26 crossingsRathnapura: Below Alert · falling · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Walayal Dola: Rare here (1–2 days a month)
Level 2 · AlertTue 10 Nov
Alert on 31 km between Puwakpitiya and Ginigathhena
Around Dehiowita and Ginigathhena, km 48–63, km 87–105.
Also: Watch on 74 km between Hanwella and Nawalapitiya
You reach it about Tue 10:00, 1 h 10 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.
NBRI’s advice, as issued
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.
NBRI, issued Mon 9 Nov, 20:00 · valid to Tue 10 Nov, 20:00lankawatch.org
Your road · 209 km~6 h 20 min
NBRI AlertNBRI WatchNot listedRiver crossingRain gaugeNo report
- Colombo to Kaduwela
Not listedkm 0–28 - Hanwella to Puwakpitiya
Watchkm 28–49 - Dehiowita
Alertkm 49–62 - Yatiyantota to Kithulgala
Watchkm 62–87 - Ginigathhena
Alertkm 87–105 - Nawalapitiya
Watchkm 105–132 - Talawakele to Ohiya (Horton Plains)
Not listedkm 132–208
LandslideAlert5 stretches · NBRI’s adviceRainHeavy rain, up to 126.5 mm in 24 hLast 3 days, satellite: Only a few days a year are this wet here · Last this wet in Dehiovita: November 2025WeatherShowers or thundershowers after 1.00p.mColombo 31° / 24° · Nuwara Eliya 22° / 13°Rivers22 crossingsHanwella: Below Alert · falling · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kelani Ganga: Rare here (1–2 days a month)
Next update usually today by 17:45.
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 Colombo–Ohiya (Horton Plains) road
The fastest road we know from Colombo to Ohiya (Horton Plains) is 212 km, about 5 h 50 min, via Kegalle, Gampola.
Main roads on it: Colombo-Kandy Road (87 km), Nuwara Eliya Road (51 km), Blackpool-Ambewela Road (13 km).
We show 3 roads between them, fastest first.
DS divisions on this road
It passes through 21 DS divisions in 6 districts, in travel order:
- Colombo
- Thimbirigasyaya
- Kolonnawa
- Kelaniya
- Biyagama
- Mahara
- Gampaha
- Attanagalla
- Mirigama
- Warakapola
- Galigamuwa
- Kegalle
- Rambukkana
- Mawanella
- Yatinuwara
- Udunuwara
- Udapalatha
- Kothmale East
- Nuwara Eliya
- Welimada
- Haldummulla
Past NBRI bulletins
Most often listed on this road, in the 41 NBRI bulletins we have passed on since Sun 20 Sept: Mawanella (38), Kegalle (31), Warakapola (27).
A record of past bulletins, not a forecast. Not being listed doesn’t mean safe.
Steep terrain
About 12 km of it runs through steep terrain (slopes over 30° beside the road).
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, 09:00.
Was this page useful?Thanks, noted.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Warakapola | Watch | 50 |
| Kegalle | Watch | 74 |
| Mawanella | Watch | 88 |
| Yatinuwara | Watch | 99 |
| Udunuwara | Watch | 102 |
| Udapalatha | Watch | 113 |
| Kothmale East | Watch | 136 |
Rain on route
×Moderate rain, up to 37.4 mm in 24 h
Rain gauges near your route
12345678910111213141516171819202122
0212 km
Key
DryLight rainModerate rainHeavy rainVery heavy rainNo rain report
- 1 Nagalagam Street, 0 mm, dry
- 2 Colombo, 8.6 mm, light rain
- 3 Dunamale, 37.4 mm, moderate rain
- 19 Nuwara Eliya, 9.4 mm, light 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 Warakapola, Galigamuwa, Kegalle, 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 Mirigama, Warakapola, Galigamuwa, Kegalle +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 Attanagalla, Mirigama, Warakapola, Galigamuwa +10 (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 Colombo, Gampaha, Kegalle, Kandy, Nuwara Eliya and Badulla.
- 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, Kandy, Nuwara Eliya, Colombo, Gampaha 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 Kegalle, Kandy, Nuwara Eliya, Colombo, Gampaha 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)
- Colombo: Showers or thundershowers after 1.00p.m. Max 31°C, min 24°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 16 named rivers · 5 basins · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kelani Ganga: Rare here (1–2 days a month) · Minor flood level
Kelani Ganga · Attanagala Oya · Maha Oya …
DunamaleMinor flood level · River level 4.6 mDepartment’s thresholds: Alert 3.3, minor flood 4.4, major flood 5.5 m
River basins along this road
- km 0–23 · Kelani Ganga basin
- km 23–56 · Attanagala Oya basin
- km 56–101 · Maha Oya basin
- km 101–105 · Mahaweli Ganga basin
- km 105–111 · Maha Oya basin
- km 111–201 · Mahaweli Ganga basin
- km 201–207 · Walawe Ganga basin
- km 207–212 · Mahaweli Ganga basin
Satellite rain over these basins
- Kelani 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)
- Attanagala 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 2 · Heea Ela (Kelani Ganga basin)
1.6 km² drain to this point - km 5 · Heea Ela (Kelani Ganga basin)
3.5 km² drain to this point - km 7 · Kelani Ganga · flows west
2,256 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Nagalagam Street, an Irrigation Department gauge 0.6 km downstream (2,256 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 0 mm in the 24 hours to 9 Nov, 08:30 (Dry); 0 mm in the 3 hours to 10 Nov, 08:01.
River level 2.7 ft · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 4, minor flood 5, major flood 7 ft) - km 26–27 · Uruwal Oya (Attanagala Oya basin) · 2 crossings · flows west
42 km² drain to this point - km 32 · Dondugam Oya (Attanagala Oya basin) · flows west
183 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Dunamale, an Irrigation Department gauge 6.3 km upstream (150 km² upstream): 37.4 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 09:02.
River level 4.6 m · Minor flood level · steady over about 3 hours (Department’s thresholds: Alert 3.3, minor flood 4.4, major flood 5.5 m) - km 46 · Diyaelle Oya (Attanagala Oya basin) · flows north-west
21 km² drain to this point - km 58–60 · Kuda Oya (Maha Oya basin) · 2 crossings · flows north
54 km² drain to this point - km 67 · Rogala Oya (Maha Oya basin) · flows north-east
3.6 km² drain to this point - km 68–71 · Galigamuwa Oya (Maha Oya basin) · 2 crossings · flows west
8.5 km² drain to this point - km 91 · Maha Oya · flows west
199 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 93–95 · Hingul Oya (Maha Oya basin) · 3 crossings · flows west
39 km² drain to this point - km 118 · 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, 09:01.
River level 3.55 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5, minor flood 7, major flood 9 m) - km 123–124 · Atabaga Oya (Mahaweli Ganga basin) · 2 crossings · flows south
44 km² drain to this point - km 137 · Gamburu Oya (Mahaweli Ganga basin) · flows south-west
0.3 km² drain to this point - km 162 · Puna Oya (Mahaweli Ganga basin) · flows west
6.8 km² drain to this point - km 175 · Nanu Oya (Mahaweli Ganga basin) · flows west
6.0 km² drain to this point - km 211 · Ellatotakanda Oya (Mahaweli Ganga basin) · flows north-east
0.4 km² drain to this point
And 3 more unnamed streams on our map
Where this road runs beside a river
- km 94–95 · beside the Hingul 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.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Ingiriya | Watch | 52 |
| Kiriella | Watch | 64 |
| Ratnapura | Watch | 90 |
| Balangoda | Watch | 135 |
Rain on route
×Heavy rain, up to 113.5 mm in 24 h
Rain gauges near your route
123456789101112131415161718192021
0218 km
Key
DryLight rainModerate rainHeavy rainVery heavy rainNo rain report
- 1 Nagalagam Street, 0 mm, dry
- 2 Colombo, 8.6 mm, light rain
- 4 Ratmalana, 14.6 mm, moderate rain
- 7 Ellagawa, 93.4 mm, fairly heavy rain
- 8 Kiriella, 113.5 mm, heavy rain
- 11 Ratnapura, 8.3 mm, light rain
- 18 Samanala Wawa, 0 mm, dry
14 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.
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 +2 (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 Ingiriya, Kiriella, Ratnapura, Balangoda +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 Colombo, Kalutara, Ratnapura and Badulla.
- 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, Colombo, Kalutara 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, Colombo, Kalutara 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)
- Colombo: Showers or thundershowers after 1.00p.m. Max 31°C, min 24°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 23 named rivers · 5 basins · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Walayal Dola: Rare here (1–2 days a month)
Kelani Ganga · Bolgoda Ganga · Kalu Ganga …
RathnapuraBelow Alert · River level 4.83 mDepartment’s thresholds: Alert 5.2, minor flood 7.5, major flood 9.5 m
River basins along this road
- km 0–21 · Kelani Ganga basin
- km 21–47 · Bolgoda Ganga basin
- km 47–137 · Kalu Ganga basin
- km 137–195 · Walawe Ganga basin
- km 195–218 · Mahaweli 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)
- Walawe Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Bolgoda Ganga 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 · Kolonnawa Ela (Kelani Ganga basin)
43 km² drain to this point - km 9 · Diyawannawa Oya (Kelani Ganga basin)
43 km² drain to this point - km 19 · Maha Ela (Kelani Ganga basin)
3.1 km² drain to this point - km 29 · Nudun Ela (Bolgoda Ganga basin) · flows south-west
35 km² drain to this point - km 34 · Maha Oya (Bolgoda Ganga basin) · flows west
27 km² drain to this point - km 44 · Pinwala Ela (Bolgoda Ganga basin) · flows south
20 km² drain to this point - km 53 · Mahawak Oya (Kalu Ganga basin) · flows south
77 km² drain to this point - km 59 · Ingiriya Ela (Kalu Ganga basin) · flows south
24 km² drain to this point - km 62 · Nambapana Ela (Kalu Ganga basin) · flows south
3.8 km² drain to this point - km 66 · Walayal Dola (Kalu Ganga basin) · flows south-east
1,447 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 68 · Yatipauwa Ela (Kalu Ganga basin)
34 km² drain to this point - km 80 · 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 91 · 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 96 · 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 99 · Katugas Ela (Kalu Ganga basin) · flows south
12 km² drain to this point - km 104–106 · 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)): 39.5 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 09:04.
River level 4.83 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5.2, minor flood 7.5, major flood 9.5 m) - km 111 · 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)): 39.5 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 09:04.
River level 4.83 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5.2, minor flood 7.5, major flood 9.5 m) - km 129 · Randi Oya (Kalu Ganga basin) · flows south-west
18 km² drain to this point - km 152 · Walawe Ganga · flows south-east
132 km² drain to this point - km 164 · Belihul Oya (Walawe Ganga basin) · flows south-east
50 km² drain to this point - km 167 · Kiriketi Oya (Walawe Ganga basin) · flows south-east
19 km² drain to this point - km 172 · Malape Oya (Walawe Ganga basin) · flows south-east
2.7 km² drain to this point - km 179 · Weli Oya (Walawe Ganga basin) · flows south-east
23 km² drain to this point - km 185 · Patana Oya (Walawe Ganga basin) · flows east
0.2 km² drain to this point - km 189 · Diyakana Oya (Walawe Ganga basin) · flows south-west
0.5 km² drain to this point - km 204 · Ellatotakanda Oya (Mahaweli Ganga basin) · flows north
28 km² drain to this point
And 7 more unnamed streams on our map
Where this road runs beside a river
- km 104–105 · 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 |
|---|---|---|
| Dehiovita | Alert | 49 |
| Ambagamuwa | Alert | 87 |
| Seethawaka | Watch | 28 |
| Yatiyanthota | Watch | 62 |
| Pasbage Korale | Watch | 105 |
| Kothmale West | Watch | 122 |
Rain on route
×Heavy rain, up to 126.5 mm in 24 h
Rain gauges near your route
123456789101112131415161718192021222324252627282930
0209 km
Key
DryLight rainModerate rainHeavy rainVery heavy rainNo rain report
- 1 Nagalagam Street, 0 mm, dry
- 2 Colombo, 8.6 mm, light rain
- 3 Hanwella, 3 mm, light rain
- 5 Penrith Estate, 126.5 mm, heavy rain
- 15 Kithulgala, 35.9 mm, moderate rain
- 19 Nawalapitiya, 77.2 mm, fairly heavy rain
- 22 Upper Kotmale, 15.9 mm, moderate rain
- 26 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 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 Yatiyanthota, Ambagamuwa, Pasbage Korale, Kothmale West +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 Ambagamuwa, Pasbage Korale, Kothmale West, Thalawakelle +2 (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 Colombo, Kegalle, Nuwara Eliya, Kandy and Badulla.
- 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, Kandy, Nuwara Eliya, Colombo 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 Kegalle, Kandy, Nuwara Eliya, Colombo 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)
- Colombo: Showers or thundershowers after 1.00p.m. Max 31°C, min 24°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 15 named rivers · 2 basins · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kelani Ganga: Rare here (1–2 days a month)
Kelani Ganga · Mahaweli Ganga
HanwellaBelow Alert · River level 6.05 mDepartment’s thresholds: Alert 6.5, minor flood 7.5, major flood 9.5 m
River basins along this road
- km 0–99 · Kelani Ganga basin
- km 99–209 · Mahaweli Ganga basin
Satellite rain over these basins
- 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 7 · Heea Ela (Kelani Ganga basin)
1.3 km² drain to this point - km 17–18 · Maha Ela (Kelani Ganga basin) · 2 crossings
24 km² drain to this point - km 17 · Kelani Ganga · flows south-west
2,060 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Hanwella, an Irrigation Department gauge 15 km upstream (1,820 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 3 mm in the 24 hours to 10 Nov, 08:30 (Light); 0 mm in the 3 hours to 10 Nov, 09:04.
River level 6.05 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 6.5, minor flood 7.5, major flood 9.5 m) - km 23–27 · Kelani Ganga · 3 crossings · flows west
1,937 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Hanwella, an Irrigation Department gauge 3.9 km upstream (1,820 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 3 mm in the 24 hours to 10 Nov, 08:30 (Light); 0 mm in the 3 hours to 10 Nov, 09:04.
River level 6.05 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 6.5, minor flood 7.5, major flood 9.5 m) - km 28 · Puswell Oya (Kelani Ganga basin)
1,937 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - 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 82 · 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 84 · 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)): 77.2 mm in the 24 hours to 10 Nov, 08:30 (Fairly heavy); 0 mm in the 3 hours to 10 Nov, 09:01.
River level 1.7 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 107 · 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)): 77.2 mm in the 24 hours to 10 Nov, 08:30 (Fairly heavy); 0 mm in the 3 hours to 10 Nov, 09:01.
River level 1.7 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-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)): 77.2 mm in the 24 hours to 10 Nov, 08:30 (Fairly heavy); 0 mm in the 3 hours to 10 Nov, 09:01.
River level 1.7 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 145–148 · 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 148–151 · 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 157 · Nanu Oya (Mahaweli Ganga basin) · flows west
67 km² drain to this point - km 164–166 · Nanu Oya (Mahaweli Ganga basin) · 3 crossings · flows north-west
24 km² drain to this point - km 198 · Kandapuhulpola Kandura (Mahaweli Ganga basin) · flows east
13 km² drain to this point
And 21 more unnamed streams on our map
Where this road runs beside a river
- km 23–24 · beside the Kelani Ganga
- km 99–100 · beside the Mahaweli Ganga
- km 150–151 · beside the Dambagastalawa Oya
- km 164–165 · 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.