Rain is likely to start in Karachi from the night of April 1, and the Pakistan Meteorological Department (PMD) says chances of rain will be higher on April 2 when a westerly weather system enters Balochistan via Iran.
The Met Office said there would also remain a chance of rain in Karachi on April 3, while rainfall in some areas could reach 50mm or more.
It warned that strong winds could also accompany the system, with wind speeds likely to reach 50 kilometers per hour or more.
According to the department, the weather system could continue to affect the country until April 4.
In a fresh advisory issued on Monday, the PMD warned of widespread rain, thunderstorms and strong winds across much of the country from April 1 to 4 as a westerly wave moves towards southwest Balochistan before gradually spreading to almost all provinces over the next few days.
Sindh is expected to be among the latest provinces to be affected, and Karachi, Hyderabad, Sukkur, Larkana and several other cities are likely to receive isolated rain, thunderstorms and hailstorms from April 2 to 4.
The Met Office warned of serious secondary hazards during the period, saying windstorms and lightning could damage weak structures, electrical infrastructure, billboards and solar panels, while standing crops in Sindh and other provinces could also be at risk from hail and strong winds.
It added that daytime temperatures are expected to drop noticeably across the country during the period and advised the public, tourists and travelers to exercise caution and avoid non-essential travel.
The PMD said the weather system is expected to persist beyond April 4 and an updated advisory will be issued in due course.
All authorities concerned have been directed to remain alert and take necessary measures to avoid any untoward situation during the planned period, the department said.
