Record-breaking heat explained


TERRE HAUTE, Ind. (WTHI) – The calendar says November, but the thermometer suggests otherwise.

Head out the door, and it looks like fall, but it just doesn’t feel like it. While we didn’t break or tie the high temperature record in Terre Haute on Tuesday, at least twenty spots around the country did. Most of the records ranged from western Texas to Ohio. You can see a few of the cities listed in the graphic above.

Louisville, KY not only bested their record high, but they set the all-time highest recorded temperature (in the city) for November with 85°F.recent-jetstream

You’re probably wondering why we’re stuck in such a hot weather pattern.

It all has to do with the subtropical jet stream, which is a ribbon of air moving west to east (several miles above us) and often found at mid-latitudes.

A strong circulation of high pressure over the Gulf of Alaska is making the jet stay far north, trapping the cold air.

National Weather Service Meteorologist Mike Ryan (from the Indianapolis office) says that this pattern will come to an end soon.

“There’s a lot of cold air sitting up in western Canada and Siberia right now,” said Ryan. “It just hasn’t been able to come down here. Eventually it will, and there’s some thought that in another two to three weeks, by the time we get inla-ninato mid-November, we’re going to see a transition to a colder pattern. ”

Yours truly believes that the weather pattern should favor cooler and wetter conditions this winter as la niña develops. This means that the aforementioned jet stream should start to nose southward soon, allowing for arctic air to spread to the lower 48.

Until then, we play the waiting game.