Meteorology

A storm system named Cassandra is expected to affect western Greece on Friday, bringing clouds, rain, and isolated thunderstorms, according to a bulletin from the National Meteorological Service (EMY).

The severe weather is expected to ease by nighttime.

The weather forecast for October 3 in Bulgaria indicates mostly sunny conditions, with high clouds expected in the northwestern regions and medium clouds developing later in the day, according to the National Institute of Meteorology and Hydrology. A mild southerly wind will prevail, with temperatures reaching between 23°C and 28°C, and around 25°C in Sofia.

This week, significant warming is anticipated, with temperatures expected to reach between 28 and 30 degrees Celsius, according to weather forecaster Anastasia Stoycheva from the National Institute of Meteorology and Hydrology.

Weather is forecast today in the Ionian Sea and Epirus until the afternoon, while in the rest of Greece cloudy with a chance of rain is expected in the west and north at noon. Although cloudy, the weather will resemble summer with temperatures exceeding 30 degrees and continuing their upward trend until Sunday.

A summer-like weather pattern is expected starting Friday, as temperatures will exceed 34 degrees Celsius; however, this warm spell will be followed by a cold air mass on Sunday, bringing a drop in temperatures.

In a post today on X, meteorologist Thodoris Kolyda noted:

Temperatures will gradually rise through the end of the week. According to the latest forecast data from meteo.gr / National Observatory of Athens, during the next few days the atmospheric circulation will favor the transfer of warm air masses towards our country.

The names that bad weather systems will have by September 2025, Thodoros Kolydas revealed.

Through a post he made on X (formerly Twitter), the EMY director spoke of cooperation between Greece, Cyprus and Israel even on names for severe weather events.

It seems that summer has bid us farewell for good, as after the bad weather Atena that hit the country, from Friday the weather scene will be affected – not significantly and only temporarily in the western parts of our country – by a new barometric low.

The information is confirmed in a post by meteorologist Yannis Kallianos, stating:

Minister of Climate Crisis and Civil Protection Vassilis Kikilias has not ruled out the possibility of local flooding from the Atena storm which is moving east from the central Mediterranean, sweeping through part of the county from Monday night until Wednesday. 

The state and the General Secretariat for Civil Protection are on high alert as storm Atena has already started affecting the country. According to meteorological forecasts, it will continue until Wednesday afternoon. Yesterday, the first alerts from the 112 emergency service were sent to citizens’ mobile phones in Western Greece, Macedonia, and Thessaly.