BENGALURU: Weathermen have predicted fairly widespread rainfall with isolated heavy to very heavy rainfall in Karnataka, mainly the coastal region, in the next three to four days. On Sunday, several places in south interior and north interior Karnataka received thunderstorms.The impending storms will be accompanied by gusty wind with speed up to 30-40kmph. The India Meteorological Department predicted squally weather with wind speed reaching 40-75kmph over the Karnataka coast for the next few days. High waves in the range of 3.5m to 4.5m are forecast for Monday along the coast from Mangaluru to Karwar. Fishermen have been advised not to venture into these areas. However, the monsoon may arrive in Karnataka only in a couple of days. CS Patil, scientist at IMD, said weather systems are not yet adequate for monsoon to enter the state. “It’s expected to enter Karnataka on Wednesday provided the required conditions are met. The state will receive isolated rainfall for the next few days,” he added.