NAO in negative phase

NAO means North Atlantic Oscillation, and when it’s in “negative” phase there’s a good possibilty of inclement weather. Usually in a negative NAO phase, low pressure systems ride along a trough (a dip in the jet stream) every few days on a boundary line line of warm humid air and and cooler air masses to the north of the trough. This NAO will remain in place for at least the next 10 days with cooler and wetter than normal conditions here in the northeast. Keep an umbrella handy!

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