P. Venugopal

Weak offshore trough brightens prospects for rain

Four districts have recorded excess rainfall

Capital district has the highest deficit of 36%

THIRUVANANTHAPURAM: The week ending July 29, which presented only 38 per cent of its normal rainfall to the State, has pushed Kerala back a notch in terms of the overall rainfall received during the monsoon so far.

Against a normal rainfall of 15.7 cm, the actual area-weighted rainfall received by the State during the week came to only 6 cm. During the season so far (from June 1 to July 29), the State received an aggregate of 132 cm rainfall, against a normal of 140.4 cm.

The State is thus 6 per cent behind the long-term average rainfall at this stage of the monsoon, according to data released by the India Meteorological Department on Thursday. Four districts are in receipt of excess rainfall at this stage: Kozhikode (22 per cent), Palakkad (11 per cent), Kannur (six per cent) and Thrissur (three per cent).

Deficit districts

The rain-deficit districts are Thiruvananthapuram (36 per cent), Kollam (27 per cent), Kottayam (24 per cent), Pathanamthitta (21 per cent), Kasaragod (17 per cent), Wayanad (15 per cent), Idukki (12 per cent), Alappuzha (11 per cent), Malappuram (eight per cent) and Ernakulam (six per cent).

The monsoon was active over Kerala during the 24 hours ending at 8.30 a.m. on Thursday, with rain occurring at most of the places in the State. Rainfall was heavy in Kannur (11 cm), Vaikom (eight cm), Kochi airport (eight cm) and Thalasserry (7 cm) during these 24 hours.

A weak offshore trough now lies at mean sea level along the Kerala-Karnataka coast, suggesting that the rain will continue. The department, on Thursday, forecast rain or thundershowers in many places in the State, with heavy rainfall likely in isolated places, for the next two days.