Weather: Today begins the first atmospheric disturbance – Where the weather will bring “P” type rain phenomenon

Today begins one of the two atmospheric disturbances that will affect our country, with the other expected Saturday. The main feature of the weather today will be showers and occasional thunderstorms possibly locally heavy on the islands of the eastern Aegean and the Dodecanese.

As Thodoros Kolydas says in his post in “X”, on Saturday a big drop in temperature of 10 degrees Celsius (locally even more) is expected. Precipitation heights will be reduced and will not be capable of producing significant snowfall based on current data.

Precipitation will be satisfactory today and tomorrow (Weather P), tapering off by Saturday afternoon into the middle of next week.

The director of EMY also presents the meteorogram of Athens and the movement of the frontal surfaces that will affect us. This is followed by the 6-hour precipitation totals, as well as the temperature change at the 850 hPa level.

Significant temperature drop in Europe

A significant drop in temperature will occur in Central and Eastern Europe from Wednesday 20/11 due to the transport of cold air masses. According to the latest forecast data from meteo.gr / National Observatory of Athens, temperatures are expected to be close to zero and snowfall is expected even in low altitude areas.

Map 1 shows the temperature expected at noon on Thursday 21/11 at an altitude of 1500 meters above mean sea level*. Blue/blue shades show the cooler air masses and yellow/red shades show the warmer air masses. Map 2 shows the estimated snow cover by noon on Friday 22/11.

It is worth noting that in our country the prevailing southerly winds keep the temperature at levels slightly above climatic values until Friday 22/11. A significant drop in temperature is expected from Saturday 23/11.

The weather today

Cloudy weather is expected mainly in the west, southwest, north, eastern parts of the Aegean Sea, Cyclades and Crete, but from noon in the northern and eastern mainland it will be cloudy. Localised showers will occur in the western and northern parts of the country as well as in the eastern parts of the Aegean and Crete but from midday they will be limited to parts of the western Peloponnese, the southern Ionian and the eastern parts of the Aegean. Sporadic thunderstorms are expected until noon in the west and southwest as well as in the eastern parts of Thrace and the Aegean. Dust concentrations in the atmosphere will be relatively increased until noon, mainly in the east and south.

The temperature in Western Macedonia will range from 2 to 12 degrees Celsius, in the rest of Macedonia and Thrace from 3 to 17, in Thessaly from 6 to 19, in Epirus from 4 to 17, in Western Central Greece from 9 to 17, in the rest of Central Greece from 9 to 19, in the Peloponnese from 10 to 21, in the Ionian islands from 11 to 18, in the North and East Aegean islands from 10 to 20, in the Cyclades from 15 to 22, in the Dodecanese from 14 to 20 and in Crete from 16 to 25 degrees Celsius. It is noted that the minimum temperature is expected towards the end of the 24-hour period.

Winds in the North Aegean will initially blow from southern directions from 4 to 6 Beaufort. In the sea areas of Lemnos and Samothrace until the morning they will locally reach up to 7 Beaufort. From noon the winds in the North Aegean will shift to westerly 3 to 5 Beaufort and towards the evening they will become northerly to northeasterly 3 to 5 Beaufort. In the Central and South Aegean, winds will initially blow from southerly directions 4 to 6 Beaufort but from the afternoon they will shift to westerly 3 to 5 Beaufort. In the Ionian Sea the winds will initially blow from westerly directions from 5 to 7 Beaufort but from the morning they will shift to north-westerly 3 to 5 Beaufort and towards the evening they will become variable 2 to 4 Beaufort.

FRIDAY 22-11-2024

Initially in the Dodecanese and gradually in the Ionian Sea, the western and northern mainland, clouds are forecasted, partly cloudy with showers and occasional thunderstorms that will intensify in the west from midday. In the rest of the regions a few clouds which will gradually increase and there will be local showers on the eastern Aegean islands, the Cyclades and western Crete.

The winds will initially blow west southwest 4 to 5 and gradually in the sea 6 to 7 Beaufort, while locally in the northern Aegean from the evening hours will increase and will reach 8 Beaufort.

The temperature will not change significantly. It will reach 17 to 19 degrees Celsius in the northern mainland, while in other areas it will reach 19 to 22 degrees Celsius and locally in Crete and the Dodecanese 23 degrees Celsius.

SATURDAY 23-11-2024

Initially in the Ionian Sea, the western and northern mainland, the islands of the eastern Aegean and gradually the Dodecanese, increasing clouds with rain and occasional thunderstorms are forecast. In the rest of the regions, a few clouds, partly cloudy, with local showers mainly in the eastern mainland, the Sporades, Evia and Crete. Possibility of light snowfall in the northwestern mountains.

From the mid-morning hours and from the west a gradual improvement of the weather is expected.

The winds will initially blow west southwest 5 to 6 and in the seas 7, locally in the Aegean Sea 8 Beaufort, while quickly in the west and gradually in the eastern seas they will turn to northerly directions with the same intensity.

The temperature will drop, mainly in the central and northern regions. It will reach 13 to 16 and locally 17 to 18 degrees Celsius in the central and northern mainland, while in the rest of the country it will reach 19 to 22 and locally 23 degrees Celsius in Crete and the Dodecanese. The minimum temperatures will range in the northern and central lowlands around -1 (minus one) to 4 degrees Celsius.

SUNDAY 24-11-2024
Generally clear weather over most of the country. Occasional clouds until noon in the Sporades, Evia, eastern Central Greece, the southwestern Aegean and Crete.

The winds will blow in the west initially northeast at 4 to 6 Beaufort and from the afternoon hours variable 3 to 4 Beaufort. In the east it will blow north at 5 to 6 Beaufort and in the Aegean Sea 7, locally in the south 8 Beaufort.

The temperature will drop further across the country and there will be frost mainly in the northern mainland, strong in places.

MONDAY 25-11-2024
Generally clear weather throughout the country with a few clouds, partly cloudy in the northeast.

The winds will blow from northern directions 3 to 4 and in the Aegean Sea 5 to 6, locally in the south 7 Beaufort.

The temperature will rise slightly in the west.

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