I. SITUATION OVERVIEW
a. Oceanic and atmospheric indicators had reached weak La Nina levels in October 2016 (PAGASA termed as borderline La Nina), but this was not sustained. However, La Nina-like conditions continue, as impacts have been seen in some flood- and landslide-prone areas in the country. It is likely that ENSO-neutral conditions will prevail in December-January-February 2017 season.
b. The weather systems that affected the country during the month were the Northeast (NE) Monsoon, tail-end of the cold front, low pressure areas (LPAs), easterlies and the passage of Typhoon (TY) "Nina" (Dec. 22-27). TY "Nina" made eight (8) landfalls that brought strong winds and excessive rains in MIMAROPA, CALABARZON and Bicol Region. Estimated damages to infrastructure amounting to 83 million pesos (mostly roads and river control facilities) were reported in the provinces of Marinduque and Oriental Mindoro, as stated in the NDRRMC Situational Report No. 7.
c. Rainfall assessment for the month of December showed that near to above normal rainfall conditions were experienced in most parts of the country, with some patches of below normal rainfall over Nueva Ecija, Leyte, Sultan Kudarat, Agusan del Norte and Maguindanao.
d. Slightly warmer than average surface air temperatures were observed in most parts of the country during the month. Ranges of temperature recorded were as follows; mountainous areas of Luzon: 13.0°C — 26.4°C; rest of Luzon: 17.0°C-34.7°C; Visayas: 21.0°C — 34.2°C; mountainous areas of Mindanao: 16.0°C —33.0°C; and rest of Mindanao: 21.5°C — 35.6°C.