- Oct 22, 2014
- 22,333
Stepped out this AM to a clear sky, 27ºF (-3ºC). There is a brisk wind biting me under my fleece. It is 06:00. Still dark here on the 45th Parallel at this time of year. The rain from yesterday has gone. The Humidity is so low that I charge up walking on the nylon carpet with my wool socks and discharge on the dog. We both jump.
What is causing this weather phenomena? Feels like those Canadians are sending their Yukon Chill south again. Start the Windy App...
The surface temps confirm You guys in the Northern Midwest and East coast are cold today.
All that blue and purple is 15º to -5ºF (-10 to -20º C)
What is bringing the Yukon Cold south? Well a couple of causes. The current High pressure cells are strong in Alaska and the Yukon of Canada. They rotate clockwise. That clockwise rotation and the close proximity of these cells provide strong pressure gradients that compact and resolve in increased wind flow.
How are these highs affecting the artmosphere? Well they are disrupting the normal pattern of the Arctic jet stream.
A normal strong Arctic Jet stream tracks along the 60th Parallel.
Todays image shows how it has been disrupted. This is the Jet at 30,000 ft (9,000m). The white areas are wind speed in excess of 100knots.
What does all this mean... Well since Ground Hog Day is only 4 days away our weather buddy Punxsutawney Phil is likely to come out of his warm hole take one look at the sun and head back into his warm nest for another 6 weeks. Unlike our intrepid retired leader @Phil Herring who is likely to see clouds and hope this all will pass in 2 weeks.
Ain't weather fun.
What is causing this weather phenomena? Feels like those Canadians are sending their Yukon Chill south again. Start the Windy App...
The surface temps confirm You guys in the Northern Midwest and East coast are cold today.
All that blue and purple is 15º to -5ºF (-10 to -20º C)
What is bringing the Yukon Cold south? Well a couple of causes. The current High pressure cells are strong in Alaska and the Yukon of Canada. They rotate clockwise. That clockwise rotation and the close proximity of these cells provide strong pressure gradients that compact and resolve in increased wind flow.
How are these highs affecting the artmosphere? Well they are disrupting the normal pattern of the Arctic jet stream.
A normal strong Arctic Jet stream tracks along the 60th Parallel.
Todays image shows how it has been disrupted. This is the Jet at 30,000 ft (9,000m). The white areas are wind speed in excess of 100knots.
What does all this mean... Well since Ground Hog Day is only 4 days away our weather buddy Punxsutawney Phil is likely to come out of his warm hole take one look at the sun and head back into his warm nest for another 6 weeks. Unlike our intrepid retired leader @Phil Herring who is likely to see clouds and hope this all will pass in 2 weeks.
Ain't weather fun.
