Extreme Temperatures
It was the sixth snowstorm to slam into the region in the last 30 days.
Overnight, thundersnow -- the rare phenomenon in which thunder and lightning strike even in the dead of winter -- shocked residents in Sellersville, Pennsylvania, and as far away as central New Jersey. Philadelphia was hit with 17 inches of snow, totals in the Washington D.C. area ranged from 3 to 7 inches and, according to the National Weather Service, parts of New Jersey had to dig out from 19 inches.
Experts say the freezing weather caused the deaths, which follow reports of scores of birds falling to their deaths in the US, thousands of fish found floating off the Florida coast and 40,000 devil crabs washing up in Kent.
The internet has been awash with conspiracy theories over the mysterious mass deaths but there is nothing sinister about the latest discovery as 500 fish - many thought to be large bream and pike - were simply found frozen in an icy pond.

The Emerald Isle was swathed in white on December 22, 2010, when the MODIS instrument aboard the Terra satellite passed overhead, capturing this true-color image.
Ireland [usually] enjoys a "temperate ocean climate" (Cfb) based on the Koopen climate classification system. Such climates normally enjoy cool, cloud-covered summers and mild winters. Ireland's climate is also [usually] moderated by the warm waters of the Gulf Stream, which flows off the western shore. Snow commonly falls only in the highest elevations; dustings may occur elsewhere a few times each year. Significant accumulations anywhere in the country are rare.
The winter of 2009-2010 was unusually cold and snowy. Called "The Big Freeze" by the British media, it brought widespread transportation problems, school closings, power failures and twenty five deaths. A low of -22.3°C (-8.1°F) was recorded on January 8, 2010, making it the coldest winter since 1978/79.
The Maryland Department of the Environment said that tens of thousands of small fish have died in the Chesapeake Bay due to the stress of the cold water.
MDE spokeswoman Dawn Stolzfus said reports of a fish kill started coming in last week from Calvert County and Kent Island.

Glacial pot-hole... or something else? Dimitri Khalezov claims the three WTC buildings were brought down by underground thermo-nuclear explosions
Crews excavating the site of the destroyed World Trade Centre this summer have uncovered a spectacular underground landscape carved into the bedrock by glaciers about 20,000 years ago.
A 40-foot 'pothole' is the most arresting feature. However reports described a world of rocky colour basking in the New York sun for the first time in thousands of years: underground cliffs, layers of steel-gray bedrock, and thousands of cobblestones in a muted rainbow of reds and purples and greens - as smooth as those found by the sea.
'There are areas in local parks that have small vertical potholes exposed," Cheryl J. Moss, the senior geologist at Mueser Rutledge, told The New York Times.
"But I'm not aware of anything in the city with a whole, self-contained depression on this scale."
More of the world's top scientists in the disciplines of geology, ecology, meteorology, astrophysics, and heliology [pdf list] are predicting that the two major cooling cycles are converging - the short term and long term Ice Ages - and Earth has just entered the beginnings of the dangerous cooling.
Both cooling periods are due and both seem to have started just as the sun's about to reach its solar maximum. When the sun goes quiet after 2012, it's expected to stay quiet for at least the next 30 to 50 years. During that time, the sun will generate significantly less heat and the planets - including Earth - will cool rapidly.
Mass migrations and famines
Now other scientists - including John L. Casey, the Director of the Space and Science Research Center - are warning that people in the coming decades are facing food and fuel shortages.
Some northern countries will be abandoned as the ice marches down from the Arctic; energy production will be interrupted; and shortened growing periods in the Northern Hemisphere will precipitate mass migrations, famines, food riots, regional conflicts and a loss of human life that could be measured on an apocalyptic scale.
The outlook is not good, with the possibility of cold soil lasting until May or June instead of Jan or Feb, crop failures can be expected. In short, we are at the front edge of an oncoming Ice-age.
Thank the hubris and unfettered greed of the corporate and government psychopaths. The death knell for a large part of life on earth has sounded.

Joe Gallegos smashes a block of snow onto friend Mike Covert, right, while Gavin Gallegos, 6, left, and Elizabeth Reed look on at White Oak Park in Chattanooga, Tenn., Saturday, Dec. 25, 2010.
Airlines grounded hundreds of flights Sunday along the Northeast corridor in anticipation of the storm, affecting major airports including New York's JFK and Newark. Airlines said more cancellations were likely as the storm progressed. Travel misery began a day earlier in parts of the South, where a rare white Christmas came with reports of dozens of car crashes.
In Washington transportation officials pretreated roads and readied 200 salt trucks, plows and other pieces of equipment to fight the 6 inches or more expected to fall in the Mid-Atlantic region.
The Northeast is expected to get the brunt of the storm. Forecasters issued a blizzard warning for New York City for Sunday and Monday, with a forecast of 11 to 16 inches of snow and strong winds that will reduce visibility to near zero at times. A blizzard warning was also in effect for Rhode Island and most of eastern Massachusetts including Boston, with forecasters predicting 15 to 20 inches of snow. A blizzard warning is issued when snow is accompanied by sustained winds or gusts over 35 mph.
As much as 18 inches could fall on the New Jersey shore with wind gusts over 40 mph.
London - Renowned climate scientist predicts a new ice age is on the way!
Scientists, climatologists and the mayor of London are all in agreement - the cold snap in Europe is going to get worse, much worse. A new ice age is underway.
According to Piers Corbyn, a British scientist who gets the climate right about 85 per cent of the time, were absolutely entering a new ice age. Serious business people - notably in farming - are starting to invest in his forecasts.
Corbyn, an astrophysicist, gets it right again and again.
In November, Corbyn said it would be the coldest for 100 years. He was correct. He predicted a snowy December for Europe, and he put his own money on a white Christmas for most of the U.S. - something that no one, not even AccuWeather had predicted.
How does he do it?
He looks at the flow of particles from the Sun, and how they interact with the upper atmosphere, especially air currents such as the jet stream, and he looks at how the Moon and other factors influence those streaming particles.

Footprints remain after people walked on the snow-covered beach at Weston-Super-Mare, England
Well, folks, it's tea-time on Sunday and for anyone involved in keeping people moving it has been a hell of a weekend. Thousands have had their journeys wrecked, tens of thousands have been delayed getting away for Christmas; and for those Londoners who feel aggrieved by the performance of any part of our transport services, I can only say that we are doing our level best.
Almost the entire Tube system was running on Sunday and we would have done even better if it had not been for a suicide on the Northern Line, and the temporary stoppage that these tragedies entail. Of London's 700 bus services, only 50 were on diversion, mainly in the hillier areas. On Saturday, we managed to keep the West End plentifully supplied with customers, and retailers reported excellent takings on what is one of the busiest shopping days of the year.
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We have kept the Transport for London road network open throughout all this. We have about 90,000 tons of grit in stock, and the gritters were out all night to deal with this morning's rush. And yet we have to face the reality of the position across the country.
It is no use my saying that London Underground and bus networks are performing relatively well - touch wood - when Heathrow, our major international airport, is still effectively closed two days after the last heavy snowfall; when substantial parts of our national rail network are still struggling; when there are abandoned cars to be seen on hard shoulders all over the country; and when yet more snow is expected today, especially in the north.
Comment: Former Soviet nuclear weapons expert Dimitri Khalezov has an entirely different explanation for this astonishing discovery.