Badulla to Ohiya (Horton Plains)

Today’s warning doesn’t mention this road

NBRI, issued Mon 9 Nov, 20:00 · valid to Tue 10 Nov, 20:00

We don’t know about road closures or damage. Be cautious on the way, especially in the hills in rain.

Next update usually today by 17:45.

Moderate rain, up to 15.6 mm in 24 h

Rain gauges near your route

• 1 Badulla, 15.6 mm, moderate rain

5 gauges not reporting.

Gauge coverage: part of the route.

Satellite estimate

• Last 3 days: among the wettest 10% of 3-day periods since 2000 in Badulla, Hali-Ela, Welimada.

Crosses 4 named rivers · 1 basin

Mahaweli Ganga

River basins along this road

• km 0–51 · 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 2–6 · Badulu Oya (Mahaweli Ganga basin) · 3 crossings · flows east
  126 km² drain to this point
  Thaldena, an Irrigation Department gauge 18.6 km downstream (279 km² upstream · rain over that area, Last 3 days: Unusual here (3 days a month)): 10.2 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 12:01.
  River level 0.78 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 5 m)
• km 23–24 · Uma Oya (Mahaweli Ganga basin) · 2 crossings · flows west
  369 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month)
• km 25–28 · Dougolla Oya (Mahaweli Ganga basin) · 3 crossings · flows east
  190 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month)
• km 41 · Kandapuhulpola Kandura (Mahaweli Ganga basin) · flows south-east
  16 km² drain to this point

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.

Moderate rain, up to 15.6 mm in 24 h

Rain gauges near your route

• 1 Badulla, 15.6 mm, moderate rain
• 6 Bandarawela, 13.3 mm, moderate rain

7 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 10% of 3-day periods since 2000 in Badulla, Hali-Ela, Ella, Bandarawela +2.

Crosses 6 named rivers · 1 basin

Mahaweli Ganga

River basins along this road

• km 0–68 · 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 2–10 · Badulu Oya (Mahaweli Ganga basin) · 6 crossings · flows east
  126 km² drain to this point
  Thaldena, an Irrigation Department gauge 18.6 km downstream (279 km² upstream · rain over that area, Last 3 days: Unusual here (3 days a month)): 10.2 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 12:01.
  River level 0.78 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 5 m)
• km 14 · Nawela Oya (Mahaweli Ganga basin) · flows south-west
  59 km² drain to this point
• km 15–17 · Badulu Oya (Mahaweli Ganga basin) · 3 crossings · flows north
  36 km² drain to this point
• km 22–23 · Badulu Oya (Mahaweli Ganga basin) · 2 crossings · flows north
  4.3 km² drain to this point
• km 34–37 · Uma Oya (Mahaweli Ganga basin) · 4 crossings · flows north
  28 km² drain to this point
• km 44 · Mahatotila Oya (Mahaweli Ganga basin)
  100 km² drain to this point
• km 52 · Haputale Oya (Mahaweli Ganga basin) · flows west
  61 km² drain to this point
• km 55 · Ellatotakanda Oya (Mahaweli Ganga basin) · flows north
  28 km² drain to this point

Where this road runs beside a river

• km 15–16 · beside the Badulu Oya
• km 22–23 · beside the Badulu Oya
• km 34–35 · beside the Uma 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.

Amber · Thunderstorms Amber Warning (Be Prepared)

• Amber · Thunderstorms Amber Warning (Be Prepared). Districts: Ampara, Badulla, Batticaloa, Colombo, Galle, Gampaha, Hambantota, Jaffna, Kalutara, Kandy, Kegalle, Kilinochchi, Mannar, Matale, Matara, Moneragala, Mullaitivu, Nuwara Eliya, Polonnaruwa, Ratnapura, Trincomalee, Vavuniya. Warning Description: There is an increased likelihood of severe lightning associated with thundershowers at several places in the following areas during the evening or night. Heavy falls above 100mm are likely at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle and Matara districts. Strong gusty winds of 60–70 kmph and very rough sea conditions can be expected temporarily during thundershowers in the sea areas. Action Required: • Stop paddy and plantation work, outdoor sports and construction when storms approach. • Move into a substantial building or an enclosed hard-topped vehicle; do not shelter under trees, open huts, tents or bus halts. • Avoid open fields, hilltops, beaches, tanks, rivers and other water bodies. • Fishermen and small-boat operators should not go to sea and should return to shore early. • Avoid bathing, using wired phones and handling electrical appliances during thunder. • Avoid travelling on tree-lined roads and through flooded roads. • Follow flood warnings and landslide warnings. • Protect livestock, crops and property, and be ready to move to a safe shelter if advised. Damage Expected: • Widespread thunderstorms with frequent lightning, strong gusty winds and heavy rain. • Risk of injury or death for people in open areas such as paddy fields, plantations, playgrounds, beaches, and for people on boats. • Trees uprooted and damage to roofs of non-engineered houses, including tin and thatched roofs. • Localized flash floods and slope failures in vulnerable areas. • Power and communication interruptions and damage to electrical equipment. • Damage to crops, plantations and livestock. • Dangerous conditions for small fishing boats and craft. • Disruption to road, rail and air transport. Issued 10 Nov, 12:45 · Valid until 11 Nov, 01:00.
• 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 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 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.
• 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.