The Istanbul Governor's Office issued a warning for the megacity, citing evaluations from the Meteorology General Directorate. Intermittent and locally intense heavy rainfall, accompanied by thunderstorms, is expected to begin early morning. Strong winds from the north are also forecast after noon, with wind speeds of 40–60 kilometres per hour and gusts of 50–70 kilometres per hour.
According to the warning, the potential consequences include flooding, waterlogging, traffic disruptions, landslides and lightning. The rainfall estimate of 21–50 kilograms per square meter gives residents an indication of the scale of the forecast. The Governor's Office advised the public to be careful and take necessary precautions against the forecast conditions.
The forecast distinguishes two periods: rain and thunderstorms are expected from early morning, while the stronger northerly winds are due after noon. Together, the details cover both the forecast rainfall and wind hazard, with flooding and traffic disruption among the possible effects identified in the warning.
The Governor's Office advised the public to be careful and take necessary precautions against the forecast conditions.