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Big Changes Brewing (weekend snowstorm Chicago, 60s and 70s much of East Coast?)

Low Expectations

NOAA reports 53 percent of the contiguous USA had snow on the ground as of December 15, the most in 11 years. No need to worry about a white Christmas this year.

It’s human nature to wonder & worry about what comes next. “Is it going to be this miserable all winter?” Based on numerous factors, including a positive phase of the Arctic Oscillation and a brewing El Nino for 2014 I think there’s a very good chance January may wind up a little milder than December.

Winter came on with a vengeance. The January Thaw will also come early, and if I had to bet I’d go with an early spring in 2014.

84-Hour Snowfall Prediction. An especially strong Alberta Clipper whips up a few inches of snow today from Pennsylvania into much of New England, maybe a couple of sloppy inches for the suburbs of New York City and Boston. 84 hour NAM snowfall prediction courtesy of NOAA and Ham Weather.

Hints of Moderation. We’re due for a major shift in the pattern, and it’s on the way, especially for the eastern third of the USA by late week and next weekend. The coldest subzero air (solid green line) brushes New England before lifting north into Quebec, the 32F isotherm on the move (northward for a change). 2-meter NAM predicted temperatures from NOAA and Ham Weather.

Major Sunday Snowfall Kansas City to Chicago? It’s still early for specifics, but the next surge of numbing air may spin up a significant storm tracking from the Mississippi Valley into the Ohio Valley over the weekend, pulling moisture from the Gulf of Mexico into the Great Lakes, where low-level temperatures may be cold enough for heavy wet snow. Meanwhile, out ahead of the storm, a surge of southern warmth boosts the mercury into the 50s, 60s and 70s. Midday Sunday ECMWF outlook: WSI Corporation.

January Thaw Comes Early. By the weekend 70s may push as far north as Richmond, even Washington D.C., with 60s into the Delaware Valley, 50-degree highs from New York City to Boston. A far cry from heavy, wind-whipped snow. Source: Wilmington, North Carolina National Weather Service.

Pattern Shift? I want to see a few more model runs and get a better sense of whether this is a fluke or a true trend, but a positive phase of both the AO (Arctic Oscillation) and NAO (North Atlantic Oscillation) could mean more of a Pacific influence across much of the USA as we end December. We’re due for a thaw. Source: NOAA.

How Do Snowflakes Form? Here’s an excerpt of a detailed explanation from NOAA: “A snowflake begins to form when an extremely cold water droplet freezes onto a pollen or dust particle in the sky. This creates an ice crystal. As the ice crystal falls to the ground, water vapor freezes onto the primary crystal, building new crystals – the six arms of the snowflake. That’s the short answer. The more complex explanation is this: These ice crystals that make up snowflakes are symmetrical (or patterned) because they reflect the internal order of the crystal’s water molecules as they arrange themselves in predetermined spaces (known as “crystallization”) to form a six-sided snowflake. Ultimately, it is the temperature at which a crystal forms — and to a lesser extent the humidity of the air — that determines the basic shape of the ice crystal. Thus, we see long needle-like crystals at 23 degrees F and very flat plate-like crystals at 5 degrees F…”

Testing The Laws of Physics. It’s ironic, but I’ve noticed a trend in recent years: SUV’s are some of the first vehicles to wind up in area ditches or fender-benders when the flakes are flying. Sitting up high, and having AWD gives a (false) sense of security. Nothing is going to help if you hit a patch of black ice – the only thing you can do is slow down. Graphic:

Mobile Apps Will Transform All Business Processes – Is Your Company Ready?Here’s a snippet of an interesting story at LinkedIn: “…So, what does all this mean for your business? It means that mobile apps designed by businesses for their internal use and competitive advantage will explode over the next two years. Therefore, all business leaders need to ask themselves: “Two years from now, do I want to be one of the companies that is not developing mobile apps to transform business processes?” Once you see the hard trends driving this software revolution, it would be hard to answer “no.” Remember, a hard trend will happen; a soft trend might happen. The hard trend is that businesses will be developing mobile apps customized for their company for various functions. The soft trend is whether your company will be one of them…”

Google Glass: Early Impressions. This is all I want for Christmas, although I’m still not exactly sure what I’d do with them, other than look even dorkier. But is here to help me understand why this has the potential to change my life: “Most companies conduct their experiments behind closed doors. If, say, a new iPhone hits store shelves, then chances are the dirty work has been done and it’s already pretty polished. But Google is very different, sometimes letting the public join in on the beta testing fun. Gizmag recently joined Google’s US$1,500 smartglasses beta program, and though we’re still a ways off from a full Google Glass review, these are our early impressions…”

Top 10 Things You CAN’T Have For Christmas 2013Gizmag has the list and they’re checking it twice – here’s an excerpt: “Luxury, so they say, comes at a price, but in the world of innovation and new technology, things can sometimes get way out of hand. It’s with this in mind that each year we compile a list of the most expensive, ambitious and completely over-the-top products and ideas that have crossed our desk in the past 12 months. So from the praiseworthy to the preposterous, here’s Gizmag’s list of the top 10 things you won’t be getting for Christmas in 2013…”

NORAD Tracks Santa’s Path On Christmas Eve Because Of A Typo. WHY does NORAD track Santa Claus, you may be wondering? Great question. I love this story – amazing but true, brought to you by The Atlantic; here’s the intro: “It was 1955, and Christmas was approaching, and Sears had a new idea for a yuletide gimmick. In local newspapers, the department store placed ads … on behalf of Santa himself. “HEY KIDDIES!” the ad read, in a greeting that would seem creepy only in retrospect. “Call me on my private phone and I will talk to you personally any time day or night.” The ads then listed local numbers for area children to call to get some one-on-one Kris Kringle time…”

Climate Stories…

Are Hurricanes Getting Stronger? Science May Finally Be Approaching An AnswerMother Jones has a very interesting article that caught my eye – here’s an excerpt: “…The result? The scientists found that globally, hurricane wind speeds are increasing at a rate of a little more than two miles per hour per decade, or just faster than six miles per hour over the entire period. There are some key caveats, though, the biggest being that the trend they found was not statistically significant at usually accepted levels. (For nerds: the p value was 0.1). But there were strong and significant trends in some hurricane basins of the world, especially the North Atlantic (the region encompassing the Caribbean, Gulf of Mexico, and open Atlantic north of the equator), where storms have been strengthening at the rate of nearly nine miles per hour per decade (see chart above). But other basins offset that, including the western North Pacific, which showed a negative trend…”

Faux Pause 2: Warmest November On Record, Reports NASA, As New Studies Confirm Warming Trend. Here’s an excerpt of a good explanation from ThinkProgress: ”

new study by British and Canadian researchers shows that the global temperature rise of the past 15 years has been greatly underestimated. The reason is the data gaps in the weather station network, especially in the Arctic. If you fill these data gaps using satellite measurements, the warming trend is more than doubled in the widely used HadCRUT4 data, and the much-discussed “warming pause” has virtually disappeared.

“There are no permanent weather stations in the Arctic Ocean, the place on Earth that has been warming fastest,” as New Scientist explained five years ago. “The UK’s Hadley Centre record simply excludes this area, whereas the NASA version assumes its surface temperature is the same as that of the nearest land-based stations…”

Graphic credit above: “The corrected data (bold lines) are shown compared to the uncorrected ones (thin lines).” Via RealClimate.

New Climate Records Focus On Earth’s Sensitivity. Here’s a clip from a story at Climate New Network and Climate Central: “…The Geological Society of London (GSL) says the sensitivity of the Earth’s climate to CO2 could be double earlier estimates. The Society has published an addition to a report by a GSL working party in 2010, which was entitled Climate Change: Evidence from teh Geological Record. The addition says many climate models typically look at short term, rapid factors when calculating the Earth’s climate sensitivity, which is defined as the average global temperature increase brought about by a doubling of CO2 in the atmosphere…”

Photo credit above: “Evidence from studies of past climate change suggest if longer-term factors are taken into account, the Earth’s sensitivity to a doubling of CO2 could also be double than predicted.” Credit:

China Roars Ahead With Renewables. Here’s an excerpt of a story at Australia’s The Conversation: “…The remarkable feature is that the share of renewables has leapt in significance. Whereas non-fossil fuel capacity additions totalled 31 million kW in 2012, these renewable and nuclear power stations have totalled 36 million kW so far this year – and could be projected to be 43 or 44 million kW for the whole year. That’s one new non-fossil power station of 1 million kW nearly every week! But the even more astounding feature is that the additions powered by renewables now exceed those powered by fossil fuels (coal and gas) and nuclear…”

Photo credit above: “Despite being the world’s biggest greenhouse gas emitter, China is increasing its renewable sources of energy.” AAP/HOW HWEE YOUNG.

2013 Arctic Report Card: Only 7% Of The Ice Cover At The End Of Winter, 2013 Was Old, Thick Ice. Details from NOAA’s “The most common metric for tracking changes in Arctic sea ice over time is sea ice extent. Extent approximates the sea ice you would see from a bird’s-eye view, and it has been declining at a rate of more than 14 percent per decade since satellite measurements began in 1979. If you were to descend below the sea surface, your fish’s-eye view would provide an equally dramatic decline: sea ice is not only shrinking across the ocean surface, it’s also thinning. Directly measuring sea ice thickness is more complicated than measuring sea ice extent, but a useful proxy for ice thickness is age. Older ice is generally thicker ice. As this pair of maps shows, the amount of very old, thick ice that exists at the end of the Arctic winter in March has dropped significantly in the past three decades. White corresponds with the oldest, thickest ice. The darkest blue represents first-year ice: ice that has survived one summer melt season…”

2013 Arctic Report Card: Visual Highlights. Here’s an overview from NOAA’s “From reindeer to regional temperature patterns, from sea ice age to Greenland surface melt, the Arctic Report Card is a yearly assessment of the Arctic’s physical and biological systems and how they are changing. This collection of visual highlights from the 2013 report is a story of the Arctic in pictures. Based on the report’s major themes, it was developed by the NOAA team in cooperation with Arctic Report Card authors and other Arctic experts.”

We’re Still Losing Ice At The Poles. Here’s an excerpt from a good summary at Slate: “…I’m not sure how much stock to put in a prediction of an ice-free Arctic in just a few years, but that day is clearly coming, and soon. Looking at the sea ice extent (essentially, how much area is covered by ice) over the past few years, we’ve lost about 2 million square kilometers over 15 years.* The extent is at roughly 10 million sq. km now, so extrapolating we have 75 years left. I’ll note that’s very rough, and I’d consider that only a decent upper limit to how long it will take. With feedback processes, that’s likely to be a severe overestimate…”

The Good And Bad News: How Climate Change Is Affecting Farming In Michigan.This has obvious parallels with agriculture in Minnesota. Here’s an excerpt from The Battle Creek Enquirer: “…Bring up the issue of climate change at the dinner table, and chances are you’ll get served with a variety of differing, heated views. The same is true in the fields. “There’s still a lot of skepticism in the farming community over how big of an issue climate change really is or if it’s happening at all,” Boring said. “I think you see a lot of guys struggling to figure out really what’s going on and looking for answers on it, because there’s so much conflicting information.” While a common conception of climate change is sharply rising temperatures, Boring said climate change is really about a gradual warming. In fact, the most damaging aspect of climate change is how this subtle rise in temperature may increase risk factors for extreme weather events such as more intense hurricanes, heavier rainfall, droughts and heat waves…”

British Wine Benefits As The Climate Change. “A fine British wine?” As Europe continues to warm the concept may not be as far-fetched as it sounds. Here’s an excerpt from The New York Times: “…More obvious, though, may be the meteorological motive that is at least partly behind Mr. Elzinga’s move. By the middle of this century, Britain could become one of the world’s big wine producers, as global warming moves the limits of viticulture ever farther north. “The wine industry in Europe will certainly change to follow the climate changes,” said Mr. Elzinga, who is now chief winemaker at Denbies Wine Estate, one of Britain’s largest vineyards. “You can’t beat the climate, so you have to follow it…” (File: Andrea Johnson).


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Welcome to the WeatherNation blog. Every day I sift through hundreds of stories, maps, graphics and meteorological web sites, trying to capture some of the most interesting weather nuggets, the stories behind the forecast. I’ll link to stories and share some of the web sites I use. I’m still passionate about the weather, have been ever since Tropical Storm Agnes flooded my home in Lancaster, PA in 1972. I’ve started 5 weather-related companies. “EarthWatch” created the world’s first 3-D weather graphics for TV stations – Steven Spielberg used our software in “Jurassic Park” and “Twister”. My last company, “Digital Cyclone”, personalized weather for cell phones. “My-Cast” was launched in 2001 and is still going strong on iPhone, Android and Blackberry. I sold DCI to Garmin in 2007 so I could focus on my latest venture: WeatherNation. I also write a daily weather column for The Star Tribune And if you’re on Twitter, you’ll find me @pdouglasweather.

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