Better air quality on Tuesday morning although slight haze may be expected

A flock of pigeons fly across the hazy gray skies at 7.10am on Oct 14, 2014. -- ST PHOTO: NEO XIAOBIN
A flock of pigeons fly across the hazy gray skies at 7.10am on Oct 14, 2014. -- ST PHOTO: NEO XIAOBIN
A slight haze causes a red sky as the sun rises against a HDB block at 7.05am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN
A slight haze causes a red sky as the sun rises against a HDB block at 7.05am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN
A flock of pigeons fly in the slightly hazy gray skies at 7.10am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN
A flock of pigeons fly in the slightly hazy gray skies at 7.10am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN
The traffic along the Central Expressway (CTE)  at 6.55am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN
The traffic along the Central Expressway (CTE)  at 6.55am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN
A woman dries her laundry along the HDB flat corridor in Toa Payoh at 7.20am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN
A woman dries her laundry along the HDB flat corridor in Toa Payoh at 7.20am on Oct 14, 2014.  -- ST PHOTO: NEO XIAOBIN

SINGAPORE - Better air quality continues into Tuesday morning although slight haze may be expected during the day.

The three-hour Pollutant Standards Index (PSI), a measure of air quality here, was 65 at 7am. The 24-hour PSI is in the range of 66 to 79.

The National Environment Agency said that prevailing winds are forecast to be light and variable in direction. Thundery showers are expected for Singapore in the afternoon.

The overall air quality is expected to be in the high-end of the moderate range but may enter the low end of the unhealthy range from time to time should the winds turn unfavourable.

Air quality is considered unhealthy when PSI readings range from 101 to 200. Prolonged or strenuous outdoor physical exertion should then be reduced or avoided under such circumstances.

jermync@sph.com.sg