National Weather Forecast

The system that impacted the Upper Midwest this past weekend is moving east Monday, with snow across the Great Lakes into New England. Some of the snow in New England will be heavy. Storms will be possible along a cold front in Florida and southern Texas. Meanwhile, a new system moves into the western United States with another round of heavy rain and mountain snow.

Rounds of heavy rain and Sierra snow will continue out west through the first part of the work week, with rain totals of 3-7” and additional feet of snow at high elevations. This will likely lead to more flooding across the region. Heavy snow will also be possible in interior New England during the first half of the week, with up to a foot and a half of snow for some.


Underused satellite, radar data may improve thunderstorm forecasts

More from Penn State: “Tens of thousands of thunderstorms may rumble around the world each day, but accurately predicting the time and location where they will form remains a grand challenge of computer weather modeling. A new technique combining underused satellite and radar data in weather models may improve these predictions, according to a Penn State-led team of scientists. “Thunderstorms are so ubiquitous it’s hard to count how many you get in Pennsylvania, or the United States or globally every day,” said Keenan Eure, doctoral student in the Department of Meteorology and Atmospheric Science at Penn State. “A lot of our challenges, even today, are figuring out how to correctly predict the time and location of the initiation of thunderstorms.” The scientists found that by combining data from the geostationary weather satellite GOES-16 and ground-based Doppler radar they could capture a more accurate picture of initial conditions in the boundary layer, the lowest part of the atmosphere, where storms form.

Arctic river channels changing due to climate change, scientists discover

More from the University of British Columbia: “A team of international researchers monitoring the impact of climate change on large rivers in Arctic Canada and Alaska determined that, as the region is sharply warming up, its rivers are not moving as scientists have expected. Dr. Alessandro Ielpi, an Assistant Professor with UBC Okanagan’s Irving K. Barber Faculty of Science, is a landscape scientist and lead author of a paper published this week in Nature Climate Change. The research, conducted with Dr. Mathieu Lapôtre at Stanford University, along with Dr. Alvise Finotello at the University of Padua in Italy, and Université Laval’s Dr. Pascale Roy-Léveillée, examines how atmospheric warming is affecting Arctic rivers flowing through permafrost terrain. Their findings, says Dr. Ielpi, were a bit surprising. “The western Arctic is one of the areas in the world experiencing the sharpest atmospheric warming due to climate change,” he says. “Many northern scientists predicted the rivers would be destabilized by atmospheric warming. The understanding was that as permafrost thaws, riverbanks are weakened, and therefore northern rivers are less stable and expected to shift their channel positions at a faster pace.”

Australia’s Massive Wildfires Shredded the Ozone Layer—Now Scientists Know Why

More from Scientific American: “Massive wildfires that raged across southeast Australia in 2019–20 unleashed chemicals that chewed through the ozone layer, expanding and prolonging the ozone hole. A study, published today in Nature, describes how smoke combined with chlorine-containing molecules in the stratosphere — remnants of chemicals that are now banned — to cause the destruction. The Australian fires produced the largest smoke plume on record, releasing roughly one million tonnes of smoke to heights of up to 30 kilometres. That’s well into the stratosphere, the portion of the atmosphere that contains the ozone layer, which protects Earth from harmful ultraviolet rays, says study co-author Kane Stone, an atmospheric chemist at the Massachusetts Institute of Technology (MIT) in Cambridge. In the months after the wildfires, the hole in the ozone layer, which appears annually over Antarctica, was larger and lasted longer than in previous years. But Stone says that researchers didn’t know why.


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– D.J. Kayser