Polar Jet Vs Subtropical Jet

Record-breaking temperatures and summer-like severe thunderstorms will continue a few more days across the Southeastern and Eastern United States.  The northward bulge of near-tropical air is the result of a very strong sub-tropical Jet Stream, which is a by-product of the ongoing El Nino. The strong Southern Jet brings more active weather; including stronger storms,…
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Extreme Australian Weather

Most of the mid-latitudinal Northern Hemisphere is having a very mild winter.  Meanwhile, on the opposite side of the world, Australia is having a rough summer so far. Ten days ago, a rare Australian tornado did significant damage to the suburbs around Sidney.  Wind was measured at 132 mph in Kurnell, near the Sidney airport,…
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El Nino Effects

Locally, November was the fourth warmest in the 135-year temperature record for Fargo Moorhead.  As measured globally by weather satellite, November was the warmest in the 37-year history of the data.  The most anomalously warm regions in general were over the Northern Hemisphere and the tropics.  This is likely a result of the very strong…
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Mild AND Sunny!

Even with a modest snow storm right after Thanksgiving, the temperature has been running more than ten degrees above average for the past couple of weeks.  In addition, the sky has been uncharacteristically clear for this time of year. The weather in November and December is renowned in our region for being as gloomy as…
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Uh-Oh, N-A-O!

El Nino is not the only force influencing our mild fall and winter.  Another important signal, the North Atlantic Oscillation (NAO), has been in the positive mode for months, also supporting a mild weather regime for our area. The NAO is tied to a large, semi-permanent low-pressure area near Iceland.  In its positive phase, a…
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