Nattandiya
Nattandiya DS division · Puttalam district
Outside NBRI areaFri 9 Oct
Outside NBRI’s warning area
NBRI issues no landslide warnings for the districts this road crosses, so the bulletin says nothing about it. This is not a guarantee that the road is safe or open.
NBRI, issued Fri 9 Oct, 16:00 · valid to Sat 10 Oct, 16:00lankawatch.org
Rain hereAbout 1–2 days a month are this wet hereLast 24 hours · Satellite estimateMet advisoryWarm Weather AdvisoryAmber, as issuedRivers4 named rivers hereRatmal Oya basin rain: Rare here (1–2 days a month)
Next update usually tomorrow by 17:45.
Rain here
×Rain here
Last 24 hours: Rare here (1–2 days a month) · Amber · Warm Weather Advisory
- Last 24 hours: among the wettest 5% of 24-hour periods since 2000 in Nattandiya.
- Last 3 days: among the wettest 10% of 3-day periods since 2000 in Nattandiya.
- 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 9 Oct, 13:30.
Weather forecast (Department of Meteorology) · Amber · Warm Weather Advisory
- Amber · Warm Weather Advisory. For Northern, North-Central, Eastern, North-Western provinces and Monaragala and Hambantota districts.. Heat index, the temperature felt on human body is likely to increase up to ‘Caution level’ at some places in Northern, North-Central, Eastern and North-Western provinces and in Monaragala and Hambantota districts during the daytime. The Heat Index Forecast is calculated by using relative humidity and maximum temperature and this is the condition that is felt on your body. This is not the forecast of maximum temperature. It is generated by the Department of Meteorology for the next day period and prepared by using global numerical weather prediction model data. Effect of the heat index on human body is mentioned in the above table and it is prepared on the advice of the Ministry of Health and Indigenous Medical Services. Issued 9 Oct, 16:00 · Valid until 11 Oct, 00:00.
- Forecast issued 9 Oct, 14:00
- Showers or thundershowers will occur in the most part of the island after 1.00 p.m.
- Covers Puttalam on this road: Fairly heavy falls above 75 mm are likely at some places in Western, Sabaragamuwa, Central, Uva, North-Western and Southern provinces.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces 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.
Rain outlook (computer model) · Next day: Not signalled
- Next day: unusually heavy rain is not signalled for the divisions on this road. (10 Oct, 05:30 to 11 Oct, 05:30)
- Next 3 days: a chance of a wet day of the kind that comes about 1–2 days a month in Nattandiya (the wettest 5% of days there; several times the usual chance). (10 Oct, 05:30 to 13 Oct, 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 Oct, 05:30, compared with each division's own satellite record.
None of these changes NBRI’s level.
Weather forecast (Met Dept)
×- Amber · Warm Weather Advisory. For Northern, North-Central, Eastern, North-Western provinces and Monaragala and Hambantota districts.. Heat index, the temperature felt on human body is likely to increase up to ‘Caution level’ at some places in Northern, North-Central, Eastern and North-Western provinces and in Monaragala and Hambantota districts during the daytime. The Heat Index Forecast is calculated by using relative humidity and maximum temperature and this is the condition that is felt on your body. This is not the forecast of maximum temperature. It is generated by the Department of Meteorology for the next day period and prepared by using global numerical weather prediction model data. Effect of the heat index on human body is mentioned in the above table and it is prepared on the advice of the Ministry of Health and Indigenous Medical Services. Issued 9 Oct, 16:00 · Valid until 11 Oct, 00:00.
- Forecast issued 9 Oct, 14:00
- Showers or thundershowers will occur in the most part of the island after 1.00 p.m.
- Covers Puttalam on this road: Fairly heavy falls above 75 mm are likely at some places in Western, Sabaragamuwa, Central, Uva, North-Western and Southern provinces.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces 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.
Rivers and catchments here
×4 named rivers here · 2 basins · Ratmal Oya basin rain: Rare here (1–2 days a month)
River basins this division lies in
- Ratmal Oya basin
- Maha Oya basin
Satellite rain over these basins
- Ratmal Oya basin · Last 24 hours: Rare here (1–2 days a month)
- Maha Oya basin · Last 24 hours: Rare here (1–2 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
- Ratmal Oya · about 12 km inside
- Koswatta Oya (Ratmal Oya basin) · about 5 km inside
- Negambo Puttalam Canal (Maha Oya basin) · about 3 km inside
- Gin Oya (Maha Oya basin) · about 2 km inside
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.
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.