Koudste lucht van seizoen (N Amerika) en waarom
Bericht van: Ronald (Oak Creek, Wisconsin) , 29-11-2013 20:23
Southeast then southerly winds develop into the area along with growing rain prospects the middle and end of next week. But the tenacious cold air mass won’t be content to sit to Chicago’s west. Current indications point to a vigorous cold front sweeping across the city and beginning a temp crash Friday and Friday night next week likely to wind up with the area’s lowest readings of the season yet.
Some of the most aggressive computer model temperature projections have temps next week in southwest Canada diving to levels under 30-below in sections of Alberta and Saskatchewan provinces and to well under 20-below in the coldest sections of Montana and North Dakota.
Abnormal arctic warmth aloft in Alaska and Eastern Russia behind the northward buckling jet stream which is setting the stage for the expansive cold surge
The irony of the predicted arctic outbreak is that the cold air’s severity is to be a by-product of a buckling jet stream over Alaska brought on by abnormal arctic latitude warmth. This development leads to a diversion in upper steering winds around the perimeter of the dome of warmth. This northward-buckling in the flow pattern over our 49th state is to sweep unseasonable “warmth” off the much warmer than normal Gulf of Alaska and Pacific ocean, where water temps are running as much as 5 to 6-degrees above normal. The same pattern is to send bitterly cold air diving from interior Alaska into British Columbia, Alberta, Saskatchewan and the northern Rockies.
The cold air is predicted to fan out across much of the Lower 48 later next week, next weekend and the week which follows.
Some of the most aggressive computer model temperature projections have temps next week in southwest Canada diving to levels under 30-below in sections of Alberta and Saskatchewan provinces and to well under 20-below in the coldest sections of Montana and North Dakota.
Abnormal arctic warmth aloft in Alaska and Eastern Russia behind the northward buckling jet stream which is setting the stage for the expansive cold surge
The irony of the predicted arctic outbreak is that the cold air’s severity is to be a by-product of a buckling jet stream over Alaska brought on by abnormal arctic latitude warmth. This development leads to a diversion in upper steering winds around the perimeter of the dome of warmth. This northward-buckling in the flow pattern over our 49th state is to sweep unseasonable “warmth” off the much warmer than normal Gulf of Alaska and Pacific ocean, where water temps are running as much as 5 to 6-degrees above normal. The same pattern is to send bitterly cold air diving from interior Alaska into British Columbia, Alberta, Saskatchewan and the northern Rockies.
The cold air is predicted to fan out across much of the Lower 48 later next week, next weekend and the week which follows.
http://oakcreekwx.com
