Air Quality Forecast
The 1-hr PM2.5 concentration readings over the next 24 hours are expected to be in Band I (Normal). Overall, the PSI for the next 24 hours is forecast to be in the Good to Moderate range.
Health Advisory
Given the air quality forecast for the next 24 hours, everyone can continue with normal activities. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.
Refer to the 1-hr PM2.5 for immediate activities, and the 24-hr PSI forecast to plan ahead.
Singapore, 4 August 2019 – It has been occasionally windy with brief showers over a few areas of Singapore in the afternoon today. The prevailing winds have been blowing from the south-southeast, and the air quality has been in the Moderate range. For the rest of today, it is forecast to be fair, with prevailing winds blowing from the southeast or south. As at 7 pm today, the 24-hr PSI was 53-57, in the Moderate range, and the 1-hr PM2.5 was 11-17 µg/m3 in Band I (Normal).
2 Persistent hotspots with smoke haze were detected in recent days over Sumatra as well as Kalimantan, which have been experiencing dry weather conditions. Due to cloud cover, a total of 16 hotspots were detected in Sumatra today, and smoke haze from persistent hotspots continue to be observed in Riau and Jambi provinces of Sumatra.
3 For tomorrow, the prevailing winds over Singapore are forecast to blow from the southeast or south. Occasionally windy conditions with passing showers are expected. The 24-hr PSI for the next day is forecast to be in the Good to Moderate range. The 1-hr PM2.5 concentration for the next 24 hours is expected to be in Band I (Normal).
4 For the next few days, dry conditions are forecast to persist over Sumatra, and the prevailing winds in the region are forecast to continue blowing from the southeast or south. There is a possibility that Singapore could experience slightly hazy conditions if there is further escalation of hotspot activities in Sumatra and the winds change to blow from the southwest. NEA is monitoring closely and will provide updates when necessary.
5 The health impact of haze is dependent on one’s health status, the PSI level, and the length and intensity of outdoor activity. Reducing outdoor activities and physical exertion can help limit the ill effects from haze exposure. Given the air quality forecast for the next 24 hours, everyone can continue with normal activities. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.
6 Air quality indicators and health advisories during periods of transboundary haze refer primarily to the24-hour PSI. There are no accompanying health advisories for any other air quality indicators. In addition, the main air pollutant during the haze season is PM2.5. Hence, the 1-hour PM2.5 concentration readings are a good indicator of the current air quality. Use this for immediate activities like going for a jog.
7 For updates, visit our NEA website (www.nea.gov.sg), MSS website (www.weather.gov.sg), the haze microsite (www.haze.gov.sg), mobile apps (myEnv and Weather@SG) or follow us on NEA Facebook (www.facebook.com/NEASingapore) and NEA Twitter (@NEAsg).
