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Pattern flip and warmer weather over northern, northwestern and parts of central Europe over the next few days

A period of warmer weather is coming for northern, central and western and parts of central Europe over the next few days, as a rex blocking pattern establishes over Europe.

500 mb height anomaly over Europe midday today, December 18. A strong anticyclone is centered over NW Europe, while a cutoff low us positioned over the southern Balkans. Map by

Daytime highs will be climbing higher over the next several days across northern and northwestern Europe. Northern Germany and Denmark and southern Sweden and Norway will likely climb close to 10 °C by the second half of the week. UK and Ireland will likely go above 10 °C, with some areas possibly pushing towards 15 °C, particularly in southern Ireland.

500 mb height anomaly over Europe late on December 19: note the ridge expanding over Scandinavia. Map by

850 mb temperature anomaly map for Europe late on December 19. Map by

Meanwhile, the Mediterranean region and southeastern Europe remain under the influence of a decaying cold core upper low, with temperatures cooler than long term average for this period.