A La Niña winter is on the way for the US

The global average temperature for September was a new record.

Enlarge / The global average
temperature for September was a new record. (credit: NOAA)

September apparently wasn’t feeling like doing anything
unusual, so it ended up being the warmest September on record for
the globe. That’s been something of a trend this year, with each
month landing in its respective top three. It has become
increasingly clear that 2020 will likely be the second warmest year
on record, if it isn’t the
first
.

Unlike in August, the contiguous US didn’t set a record in
September, though it was still above the 20th century average. A
high-pressure ridge
dominated
over the West Coast again, leading to even more warm
and dry weather for much of the Western US. But a trough set up
over the Central US in mid-September, bringing cooler air
southward.

Two more hurricanes—Sally and Beta—led to above-average
rainfall in the Southeast. Total precipitation for the contiguous
US was a touch above average as a result, but the average as usual
masks local differences. Drought conditions have expanded and
worsened over much of the West, and there has been little relief
for wildfire
conditions.

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Source: FS – All – Science – News
A La Niña winter is on the way for the US