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Blocking pattern
Posted at 7:06 AM on April 29, 2008
by Paul Huttner
The sun is back today for much of the day in Minnesota.
Look for a few mid level clouds to drift by from time to time.
We're in between low pressure systems today. Atmospherically, a big "Omega" block has set up to our east. So named because they look like the Greek letter Omega on the weather maps, these stubborn features bend the jet stream and tend to keep weather systems in place.
This is why we've been so cool in Minnesota lately. The past 3 months combined have been cooler than average by about 3.3 degrees for the metro. Persistent low pressure in the upper atmosphere over James Bay has kept Minnesota in a northerly flow.
Look for more sun through tomorrow and warmer temps. We should make the 60's Wednesday!
PH
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