Steep 5-7 day rises in temperature over Greenland typically heralds a developing -NAO and that’s exactly what we’re seeing now which promises a chilly week dominated by northerly winds over the UK.
Temps have went from -55 to -22 and it’s likely to warm further in the next few days. The reason for warming is the height rises over Greenland and a warming air mass.
We’ve a textbook -AO/NAO this week as heights rise in Greenland, they lower over Western Europe.
CFSv2 1-7 day
Credit: Tropical Tidbits
GFS ensemble 1-5 day
Credit: Tropical Tidbits
GFS ensemble has the toasty Greenland, chilly UK in the 1-5 and 6-10.
Credit: Tropical Tidbits
Credit: Tropical Tidbits
Notice both AO/NAO pulls back towards neutral but then takes another nose dive in early to mid December.
The projected weakening and displacement of the polar vortex could be why.
GFS still predicting a major upward pulse of energy from the troposphere to the stratosphere second week of December. This is likely to disrupt with #PolarVortex with long term implications for our weather. Interesting blog tomorrow! https://t.co/WrK3pLgibU pic.twitter.com/Kf5AGzEf0Z
— Judah Cohen (@judah47) November 26, 2017
GFS continues to throw out some incredible #PolarVortex displacement in the extended range. Zonal winds in this run are taking a hit –> https://t.co/ePA7eSQgjF pic.twitter.com/0CI6XzVySo
— wxcharts (@wxcharts) November 27, 2017
FEATURED IMAGE CREDIT: https://kcstormfront.wordpress.com/2013/11/15/winter-weather-in-our-part-of-the-midwest/
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