Posted at 8:20 AM on July 16, 2009 by Paul Huttner Get ready for
an arctic outbreak. No we're not talking sub-zero air in July,
but if the weather maps looked like this in January we would be.
The jet stream and surface winds are blowing air directly from
the Arctic Circle into Minnesota over the next 48 hours. The
source region for Friday's air mass is the Arctic Ocean. When
this happens in meteorology we call it "cross-polar flow." When
it happens to you in July, you call the weatherman "names." High
temperatures Friday may be in the low 50s in northern Minnesota.
We should make the September like 60s here in the south. The
forecast high is around 67 degrees tomorrow in the metro. That's
the average high for the last week in September! The record low
maximum temperature for Friday is 66 degrees set back in 1939.
We have a shot at that record tomorrow. The only thing that may
save us is the higher sun angle at this latitude compared to the
Arctic. The increased solar energy will tend to modify the
chilly air