Central Europe Arctic outbreak

Updated: 1/7/2019 5:13:40 AM
Lots of snow over the Balkan peninsula, including Greece! Strong Bora winds expected along the Adriatic sea with gusts above 130 km/h.
Source: DORRIS
Updated: 1/5/2019 3:29:43 AM
A strong ridge develops over the northern Atlantic region this weekend, centered over the Norwegian sea, between the British Isles, Iceland and Norway, extending all the way from the Iberian peninsula far into the Arctic region to Greenland and Svalbard island. Warm air mass builds up under the ridge and is adverted northward by deep lows pushing from the broad low pressure area to the west. Expect temperatures up to 8-16 °C higher than normal across parts of the British Isles and Ireland, parts of Scandinavia and the Norwegian sea. Parts of Iceland the Denmark strait and Greenland will be even warmer, up to 16-20 °C above normal for this part of the year.
Source: DORRIS
Updated: 1/4/2019 3:09:53 AM
As soon as the Arctic outbreak reached the southeast Europe, it developed a secondary cyclone over Greece. This system is expected to intensify through the afternoon and track northeast across the Black Sea and towards southwest Russia and Georgia tomorrow. It will bring excessive rainfall across Turkey and indeed a lot of snow into the higher terrain there, and also across the Greater Caucasus mountain range.
Source: DORRIS

Published Tuesday, January 1, 2019

The new year starts with a significant pattern change and a strong Arctic cold air mass outbreak across the eastern half of Europe, including east-central Europe, Balkan peninsula, parts of Mediterranean and black Sea / Turkey region.

After Jan 3rd, a few very cold days are expected over these areas with temperatures locally more than 10 °C below normal.

An extremely cold airmass with temperatures more than 10 °C colder than average will spread on Thursday, Jan 4th and into the weekend days and reach the far south / southeast Mediterranean by late Saturday and Sunday, Jan 6th.

An orographic effect of north / northeasterly flow across the Balkan peninsula should bring quite a lot of snow across the western and southern parts of the peninsula – Bosnia and Herzegovina, Serbia, Montenegro, Greece, Bulgaria and FYROM.

An additional result of the very cold air mass arriving into the Mediterranean region will also be the sea-effect snowfall across the W Adriatic region and south-central Italy.

Strong and cold low / mid-level winds should bring very low wind chills as well – likely below -20 °C in many areas. Locally, hurricane force Bora winds should develop along the E Adriatic region.

When the trough reaches southeastern Europe and Mediterranean, a deep cyclone will likely result and bring a frontal system across Turkey.

Across the coastal areas, a lot of rainfall (200-300 mm possible) is expected and indeed a lot of snow inland across the higher terrain once the very cold air mass overspreads the region. Locally, 50+ cm of fresh snow can be expected.

Another area of interest for an excessive rainfall / snowfall event will also be the west-central Norway where persisting strong orographic precipitation will be on going for several days as very strong north / northwesterlies advect moisture from the Norwegian sea inland.

Locally, more than 250 mm of rainfall cold be possible – and indeed more than a meter (100 cm) of fresh snow into the mountains.

Read more at http://www.severe-weather.eu/
Source: DORRIS

Central Europe Arctic outbreak Facts

Power: 0
Affected Area: 2000 km.
Alert Level: Green
Category: Met
Response: Prepare
Severity: Severe
Urgency: Expected
Certainty: Observed

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