The Meteorological Service of Singapore reports on 16 June 1999 for the South East Asian region: “Cloudy conditions were observed over northern Sumatra and eastern Borneo. Some small hot spots were observed over Sumatra”.
Fig.1. Regional Surface Winds and Haze/Hot Spot Map, 16 June 1999
The Indonesian Meteorological Agency Badan Meteorologi dan Geofisika publishs the Indonesia Daily Forecasting for 17 June 1999. For the representative selected areas metereological data are provided as follows:
Fig.3. Fire Overview Map for 15 June 1999 of the IFFM project in Samarinda
Summary: Although the current fire weather conditions do under normal conditions not favour extensive land clearing by fire or escaping wildfires in Indonesia, the consequences of the large wildfires of 1997-98 must been taken into consideration. These fires had caused extensive degradation of primary and secondary forests along with the spreading of “alang-alang” (Imperata cylindrica) grasslands. These grasslands facilitate the spread of uncontrolled fires over large areas.