typhoon lan

Typhoon Lan Long Range Weather Pattern Eastern US

Typhoon Lan Long Range Weather Pattern Eastern US

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Typhoon Lan Long Range Weather Pattern Eastern US

It isn’t often that we pay attention to typhoons in the Western Pacific but back in the winter of 2014-2015 two typhoons that recurved near Japan and headed toward the Gulf of Alaska were big players in the weather pattern over North America. Recurving typhoons in the Western Pacific can energize a strong storm in the Gulf of Alaska. This creates downstream effects with a strong ridge of high pressure aloft building in the Western US and in turn a deep trough in the Eastern US. Sometimes these typhoon recurvatures can create a weather pattern that can last a few weeks or more. In the case of 2015 it wound up lasting from mid January right until the end of March.

typhoon lan

Typhoon Lan is making landfall near Tokyo right now with 105 mph winds. It will continue northeastward and become a strong extra tropical cyclone in the Northeast Pacific and head for the Bering Sea. From here models strengthen this upper low over Alaska which creates a strong ridge in the Western US and the corresponding deep trough in the Eastern US.

typhoon lan

Whether this is a short term change or longer term remains to be seen however at least for the next 10 days or so this scheme seems to be locked in place. The other development closer to home is the situation in the Northwest Caribbean where pressures will be lower than normal later this week and next weekend. Right now on the satellite loop there is disturbed weather there but for the moment upper level conditions are not conducive for development.
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We mention this because both the GFS & European model develop some sort of tropical system in the Northwest Caribbean next weekend and the European argues for some sort of coastal low early next week riding up the Eastern Seaboard. We are not ready to jump aboard that ship at the moment but it does offer some interesting possibilities going forward.

MANY THANKS TO TROPICAL TIDBITS FOR THE WONDERFUL USE OF THE MAPS

 

 

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