Hatton

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, 20:00

Rain gauges near Hatton

• Hatton (NBRI) · about 1 km away
  19 mm, Moderate rain
• Dikoya · about 1 km away
  no report
• Kotagala (NBRI) · about 3 km away
  31.4 mm, Moderate rain
• Lethenty Tea Estate (NBRI) · about 4 km away
  11.2 mm, Moderate rain

Rain in the 24 hours to Mon 9 Nov, 08:30, as published by Department of Meteorology · Irrigation Department · NBRI. Nearest first; Met gauge sites are approximate.

• No Department of Meteorology advisory is in force for 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 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 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.
• 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.

4 named rivers here · 2 basins · Kelani Ganga basin rain: Rare here (1–2 days a month)

River basins this division lies in

• Kelani Ganga basin
• 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.

Named rivers through this division

• Hambamata Oya (Kelani Ganga basin) · about 16 km inside
• Mahaweli Ganga · about 8 km inside
• Kehelgama Ganga (Kelani Ganga basin) · about 3 km inside
• Agra Oya (Mahaweli Ganga basin) · about 1 km inside

Irrigation Department gauges on these rivers

• Norwood, an Irrigation Department gauge in this division (97 km² upstream): at least 6.7 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 1.2 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 1.5, minor flood 3, major flood 4.5 m)

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.