Because of Typhoon Meranti’s path which right now is on track to continue inland and then dissipate, people living in the Eastern U.S. and parts of eastern Canada will be seeing some above-normal temperatures over the next week or so.
“Cool shots, like the one spanning Thursday and Friday in the northeastern U.S. this week, will be brief up until around the end of the month,” according to AccuWeather’s Long-Range Meteorologist Mike Doll.
The cooler air is still bottled up near the U.S.-Canadian border across about half of the boundary, but further north in Eastern Canada, as can be seen in this weather map below.
But as normal temperatures begin a downward trend, this weekend and through the next week will actually see a number of days with above -normal temperatures as far north as Nova Scotia, which will see temperatures reaching into the low-70s by Tuesday.
How the path of a Pacific tropical cyclone can affect weather in the U.S. and Canada
The warm surge we will experience during the middle and latter part of next week is largely due to the path Typhoon Meranti has taken.
So right now, Meranti is expected to continue on a track that will carry it well inland where it will eventually dissipate. So how does this particular movement affect people in the eastern half of the U.S.?
It has to do with the failure of the tropical cyclone to recurve east and away from Asia. Tropical revolving storms (TRS) in the Northern Hemisphere usually form between 10 and 30 degrees away from the equator and travel in a west or west-northwest direction. During their passages, they curve away from the equator, which means they curve toward the north or northeast.
The Typhoon Rule
When they don’t recurve, they usually end up making landfall. In this case, Meranti did not recurve, failing to obey something called the “Typhoon Rule.”
The typhoon rule has been around for ages and was used by Joe Bastardi when he was at AccuWeather. Basically, it says, “If a typhoon recurves as it approaches Japan, whether it be too late to miss the Korean Peninsula or completely miss Japan OTS, the weather in the Eastern US is teleconnected 6-10 days later.”
Well, because Meranti failed to recurve, that means the weather across the Pacific and North America will have a buildup of warmth in the Eastern part of the U.S. and Canada over the next six to 10 days. Conversely, if Meranti had gone ahead and recurved, we would be seeing and feeling much cooler weather next week.
“One such typhoon, Malakas, (as seen in the above map), is projected to curve away from Asia this weekend into early next week, which would set into motion much cooler air in the eastern U.S. just prior to the end of September,” Doll said.
