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Home > Current Affairs News > Heavy rainfall warning for Istanbul: Peak hours to coincide with morning traffic

Heavy rainfall warning for Istanbul: Peak hours to coincide with morning traffic

The Turkish State Meteorological Service (MGM) and the Istanbul Governor's Office have announced that heavy rainfall and storms are expected on Tuesday, October 27; experts are issuing warnings regarding morning traffic.

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Published: 26.10.2026 23:16 Updated: 26.10.2026 23:16
Heavy rainfall warning for Istanbul: Peak hours to coincide with morning traffic

The Turkish State Meteorological Service (MGM) and the Istanbul Governor's Office have issued a warning against heavy rain and thunderstorms expected to affect the city on Tuesday, October 27. According to the statement, the rainfall is expected to be heavy starting from the morning hours, and locally very heavy in the northern districts.

The Governor's Office reported that precipitation levels could generally reach the 21-50 kg/m² range, and between 21-75 kg/m² in Arnavutköy, Sarıyer, Beykoz, Eyüp, and Şile. The heavy rainfall is expected to lose its intensity by the evening hours.

Meteorological warning graphic from the Istanbul Governor's Office.
The Istanbul Governor's Office has called on citizens to take precautions against heavy rain and wind.

The warning stated that the wind will blow from northern directions at speeds of 40-60 km/h, with occasional short-term storms potentially reaching 70 km/h. Temperatures are also expected to drop noticeably with the rainfall, remaining 3 to 5 degrees below seasonal norms.

The Governor's Office urged citizens to be careful and take precautions against risks such as flash floods, inundation, strong winds during rainfall, and disruptions in transportation.

MORNING HOURS IDENTIFIED FOR PEAK RAINFALL

Meteorology professor Mikdat Kadıoğlu also stated in a post on his social media account that the most intense rainfall in Istanbul is expected between 03:00 and 12:00. Kadıoğlu pointed out that this time interval coincides with the hours when millions of people set out for work and school.

Emphasizing that the number of people who have to be on the road, especially between 06:00 and 10:00, should be reduced, Kadıoğlu stated that options include late starts for classes, online education, flexible working hours, and district-based decisions, in addition to a full-day holiday.

Mikdat Kadıoğlu's social media post regarding the rainfall warning in Istanbul.
Mikdat Kadıoğlu shared his assessment regarding the hours when the rainfall is expected to be most intense on his social media account.

In his post, Kadıoğlu argued that making decisions after the risk has occurred would be a late step in terms of disaster management, stating, "Disaster management is not declaring a holiday after people are stranded on the road; it is reducing exposure before the danger arrives."

HEAVY RAINFALL ALSO EXPECTED FOR MARMARA AND AEGEAN

According to the latest assessments by the MGM, partly cloudy and very cloudy weather will prevail across Turkey. Intermittent showers and thunderstorms are forecast for most regions, excluding the central and eastern Black Sea coasts, the northeast of Eastern Anatolia, and Artvin.

Turkey weather map for the night of October 27, 2026.
According to meteorological forecasts, heavy rainfall will be effective in the western regions on the night of October 27.

Rainfall is expected to be heavy and locally very heavy throughout the Marmara region, except for Sakarya and Bilecik. While a heavy rainfall warning has been issued for the surroundings of Aydın and Antalya as well as the southern parts of Denizli, it was reported that the rainfall could be severe and locally extreme in the surroundings of Muğla.

Turkey weather map for the morning hours of October 27, 2026.
A heavy rainfall warning is in place for parts of the Marmara, Aegean, and Mediterranean regions for the morning hours of October 27.

Strong and short-term storms are expected from northern directions in the Marmara and North Aegean coasts, and from southern and southeastern directions in the east of Central Anatolia and the coasts of Muğla. Dust transport is forecast for Southeastern Anatolia.

Turkey weather map for the noon hours of October 27, 2026.
The rainy system is expected to continue its effect over a large part of the country during the noon hours.

In the specific forecast for Istanbul, it was stated that temperatures will range between 13 and 15 degrees, heavy rainfall will be seen in the morning hours, and the rainfall will be locally very heavy in the northern districts.

Weekly weather forecast map of the Turkish State Meteorological Service for October 27 - November 2, 2026.
In the MGM's weekly weather forecast, the rainy system is expected to be effective in different regions throughout the week.

Authorities reiterated their call to be careful against adversities such as flash floods, inundation, lightning, local hail, strong winds during rainfall, the risk of tornadoes in coastal areas, and disruptions in transportation.


News Source: 12punto

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Istanbul General Directorate of Meteorology Istanbul Governor's Office Mikdat Kadıoğlu showers storm weather