Weird Winter Weather Across U.S.Jan. 13, 2006 — Sunshine and 57 degrees. Can this really be Chicago in January?
Today will be the 22nd straight day of above-normal temperatures in parts of the Midwest. In the Northeast, New Yorkers will likely trade sweaters for short sleeves. The normal temperature in New York City for this time of year is 38 degrees, but today's forecast is 54. Boston's normal is 36 — today's forecast is 56. And in Washington D.C., the normal temperature is 42 degrees. Today, try 62.
"The good thing about these warm temperatures, it saved us an awful lot of money," said Phil Flynn, energy trader for Alaron Trading Corp.
Bernie Rayno, meteorologist for Accuweather, explained the warm-weather phenomenon.
"The reason for the warmth across the United States is a westerly flow," Rayno said. "In a westerly flow, the air comes from the Pacific and as it comes down from the eastern side of the Rockies, it warms and it dries. And that's the air mass that we've been under."
That warm air is then propelled straight across the country by the current jet stream — what's called a strong "Pacific jet."
But the pleasant weather isn't being felt everywhere in the U.S.
There are record rains in Seattle, bizarre winter wildfires in Colorado, and drought so bad in Arizona that water reservoirs are running dangerously low. "The pattern we're in right now is somewhat strange, leaving some areas quite wet, some areas quite dry," said Bob Glancy of the U.S. Weather Service.
Put simply, the West has been cut in two by a powerful jet stream that's sending all of the precipitation north — leaving almost nothing for southwestern states.
The result is a total drenching of Oregon and Washington — wreaking havoc on homes and hillsides. In the process, the rains also have nearly broken the region's rainy day record.
"I've had enough!" said Seattle resident Helene Cho. "I don't care about the record!"
Northern Colorado is getting that rain in the form of a massive snowfall. But the southern part of the state is getting nothing, resulting in unusual winter wildfires. Arizona is also worried about wildfires. Phoenix hasn't had a single drop of rain since Oct. 18. Last year was the exact opposite. One piece of potentially good news: Forecasters say the storm track may change soon, shifting more moisture to the south.
Weird WeatherAttack of the Giant Ice Balls
In January 2000, Spain came under attack from an unknown assailant. Giant chunks of ice dropped from cloudless skies and crushed car hoods, punched through rooftops and windshields, and slammed into the shoulder of an elderly woman. In a 10-day period, 15 basketball-sized ice balls weighing up to 8 pounds pelted southern Spain.
At first, Spanish authorities deemed the mysterious mass the work of passing aircraft - likely frozen excrement from the lavatory or perhaps condensed ice sliding off the wing - and sent the offending ball to the laboratory to be examined. But then the ice balls kept falling, and new theories emerged: Perhaps it was something extraterrestrial like stray ice from a passing comet, or perhaps a byproduct of some strange new meteorological condition? Was it a hoax? Is it a hoax?
Jesus Martinez-Frias, a senior scientist at the Center for Astrobiology in Madrid, raced all over Spain collecting the chunks of ice preserved by witnesses and brought them back to the lab for analysis. Martinez-Frias and his team found that the ice balls did not contain human excrement or the trademark blue disinfectant used in airplane toilets. They also discovered that the ice balls did not fall from an airplane¹s fuselage because the sites did not correspond with known flight paths.
They also found there was nothing extraterrestrial about them. Martinez-Frias and his co-workers discovered that the ice had the chemical signature of this world¹s hailstones.
Of course, after the story broke, a couple of merry pranksters made fraudulent ice balls- one out of salt, the other taken from a restaurant freezer- which were easily identifiable as imposters not only because of their chemical signature, but also because they lacked the trademark onionskin layering of hailstones.
Most hailstones are the size of peas and weigh a fraction of an ounce; sometimes they reach the size of baseballs. The largest hailstone on record in the United States weighed in at 27 ounces - nowhere close to the 6 to 8 pound monsters that dropped on Spain. The really big hailstones usually accompany ferocious thunderstorms that produce tornados.
Hailstones are formed by winds known as updrafts that blow upward in thunderstorms. The droplets of supercooled water - water that is at a temperature below freezing, but not yet ice - are carried upward where they hit ice crystals, freezing them instantly and causing the ice ball to grow. Hailstones cycle between the updraft to the top of the cloud, the descent along the outer edge of the cloud, and back up again. The hailstones grow with each revolution until they become too heavy for the updraft to lift anymore, and they fall out the bottom of the cloud.
Which is why, what scientists are now calling megacryometeors are so puzzling. If megacryometeors really are big hailstones, the updrafts would have to be extremely strong. And you would expect that they would be accompanied by the storm of the century, but instead they have fallen from cloudless skies.
Since the deluge of megacryometeors that rained on Spain in January 2000, the Martinez-Frias team has studied and followed this phenomenon; and they have found that this phenomenon isn¹t unique to Spain. Argentina, Australia, Austria, Canada, Colombia, The Netherlands, New Zealand, and the United States have reported a megacryometeor event. In all, there have been more than 50 confirmations, and the researchers believe that is only a small fraction of the actual number. The ice balls are getting larger too: 25 and 35 pounders are frequently reported. Recently, Brazil reported a 440-pound behemoth.
So what's the deal - really big hail or something else?
Global warming might be to blame: The researchers found a meteorological anomaly on the days preceding the megacryometeorological events; ozone levels were unusually low over southeastern Spain, which allowed more solar radiation to reach the troposphere, thereby cooling the lower stratosphere.
Another meteorological team found that the lower stratosphere was unusually moist during the 10 days the ice balls fell. They speculated that the nuclei of the ice ball could have been lingering jet contrails that then descended through a nearly saturated atmosphere.
There have been detractors. Some meteorologists and hail experts have denounced the theories posed by Martinez-Frias, stating that formation of hail without thick highly-visible clouds is an impossibility.
However, in the summer of 2002, Martinez-Frias and fellow researchers proposed a novel mechanism for generating what one would constitute as hail on a clear day.
Perhaps megacryometeors is the work of a master prankster; perhaps it's the byproduct of global warming. I'm sure we¹ll soon find out. After all, the sky is rising - say scientists in California.