""Our assessment of the science finds that the atmosphere and ocean have warmed, the amount of snow and ice has diminished, the global mean sea level has risen and the concentrations of greenhouse gases have increased," said Qin Dahe, the other co-chair of the working group."...(parag. 15).
10/3/13, "Blizzard Eyes Areas From Wyoming to South Dakota," Accuweather.com
============================10/3/13, "Winter Storm Atlas Forecast: Snow to Impact Montana, Idaho, Colorado, Wyoming, South Dakota, Western Nebraska," Weather.com
"The calendar may have just turned to October; however, Winter Storm Atlas is poised to bring heavy snow to the northern Rockies, some snow even at lower elevations, and perhaps the season's first snow to parts of the Northern Plains.
Timeline
Thursday night: Rain changes to snow on the Plains of Wyoming, the Black Hills of South Dakota and perhaps the Nebraska Panhandle. Strong north to northeast winds in these areas may produce areas of limited visibility.
Friday: Snow, possibly heavy,
will persist in much of Wyoming and the Black Hills of South Dakota, the mountains of northern Colorado and northeast Utah. Rain may mix with or change to wet snow in parts of western Nebraska and western South Dakota. Strong north winds will lead to reduced visibility in eastern Wyoming, the mountains of northern Colorado, western Nebraska and western South Dakota.
Friday night: Rain should change to wet snow in western Nebraska, lower elevations of western and central South Dakota, and perhaps parts of central and/or southwest North Dakota. Reduced visibility thanks to strong north to northwest winds can be expected as well. Snow tapers to flurries or light snow showers over most of Wyoming and the mountains of northern Colorado, and may end entirely over Utah.
Saturday: Wet snow may persist in parts of the Dakotas and northern and western Nebraska. Clearing skies but chilly temperatures over the Rockies and adjacent foothills.
(CITY FORECASTS: Cheyenne, Wyo. | Casper, Wyo. | Rapid City, S.D. | Pierre, S.D.)
Now, let's address the impacts of Winter Storm Atlas, including snow accumulations, wind and potential for power outages.
Impacts
As you can see in our snowfall forecast map at right, the heaviest snow accumulations from Winter Storm Atlas are expected to be over the highest elevations of southern Montana, Wyoming and far northern Colorado. More than a foot of total snow is likely over the Tetons, Bighorns and Beartooth Ranges of Wyoming and far southwest Montana, as well as the Black Hills of South Dakota and mountains of far northern Colorado.
With that said, significant accumulations, possibly more than six inches, are also expected over some lower-elevation cities including Casper, Cheyenne and Laramie, Wyo.
As the winter storm treks east, the forecast for snow in the northern Plains and Upper Midwest becomes more dicey, typical of an early or late-season event.
There's a chance that we could see rain change to or mix with snow at times from the Dakotas into western Nebraska Friday into Saturday. This will be dependent on how much cold air comes southward from Canada in combination with how much cold air the storm can generate itself, as well as time of day (nighttime being cooler and more favorable for snow to accumulate).
If this happens, there is a potential for at least one, if not several inches of wet snow from western Nebraska into western and central South Dakota, and perhaps a small part of North Dakota.
If any snowflakes do fly through the air, it would be the first of the season for parts of this region, and could be among the earliest one-inch-plus snowfalls on record for locations such as Pierre, S.D.
Note that this same low-pressure system will bring severe weather farther southeast over the central and southern Plains and parts of the Midwest. Click here for more on the severe weather threat.
(PHOTOS: Northern Rockies Snow Last Week)
If that weren't enough, strong winds will pick up Thursday night, and continue through much of Friday and Friday night in these areas.
The combination of wet, heavy snow and strong winds will lead to reduced visibility with local blizzard conditions in parts of Wyoming, the mountains of far northern Colorado and the Black Hills of South Dakota from late Thursday through Friday night.
In addition, the weight of wet snow and force from strong winds will lead to some downed trees or tree limbs, particularly on trees still yet to drop their leaves. Power outages will also be an issue in these areas.
Check back with weather.com and The Weather Channel for more updates on Winter Storm Atlas." via IceAgeNow.info
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Source for 2013 UN IPCC prediction of less snow:
9/27/13, "IPCC Climate Change Report Expresses Extreme Confidence In Human Cause Of Global Warming," AP, Karl Ritter via Huffington Post
""Our assessment of the science finds that the atmosphere and ocean have warmed, the amount of snow and ice has diminished, the global mean sea level has risen and the concentrations of greenhouse gases have increased," said Qin Dahe, the other co-chair of the working group."...(parag. 15)
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