Weather

weather

Rivers in the sky: Improving predictions of atmospheric rivers to reduce risk

Researchers are working to improve forecasts of atmospheric rivers — long, narrow systems of moist, tropical air that can deposit enormous amounts of water, bringing both relief from drought and catastrophic flooding.
23 Aug 2018

Comment: The changing shape of local climates

Climate is changing globally, but how will it be experienced locally? Researchers are developing the techniques needed to understand and predict the local consequences of global change.

02 Jul 2018

"Dam levels critical" in Cape Town

At first glance, a visitor to Cape Town might not notice the extent of the parched conditions — people still go about their business, amid the same kind of hustle and bustle you would find in other major cities. But looking closer, there are signs that something is not right. People standing in buckets to conserve water during showers is one such sign, and bottled water flying off grocery store shelves is another.

13 Jun 2018

Cape Town faces a waterless future

The city of Cape Town, South Africa, is bone dry. In 2017, after two straight years of drought, a third drought year offered more of the same.. This past January, city leaders announced that they would shut off the taps to the municipal water supply in April because that was when “Day Zero” — the day when the water supply would run dry — was predicted to occur. Day Zero has since been pushed back to sometime in 2019, but, for 4 million Capetonians, living under the specter of a day without water is the new normal, and signs of that reality litter the city. Sometimes literally.

22 May 2018

El Nino "flavors" affect California rainfall

Twenty years ago, the 1997–98 El Niño surpassed the 1982–83 event to become the strongest El Niño ever recorded, contributing to famine and drought in Southeast Asia, devastating floods in Southern California, and other natural disasters. By many metrics, the 2015–16 El Niño bested both to claim the title of the strongest El Niño on record. This most recent event, nicknamed the “Godzilla El Niño,” did contribute to extreme weather in parts of the world, including disastrous fires in Indonesia and the longest, global coral-bleaching event on record. However, it did not have the anticipated effect on California, which, at the time, was in the midst of a severe multi-year drought. In a recent study, researchers suggest the 2015–16 El Niño was the wrong “flavor” to bring heavy precipitation to the state.

13 May 2018

Lakeshore shape influences lake-effect snow

On Dec. 11, 2013, Upstate New York’s Tug Hill region received more than 100 centimeters of snow in 24 hours. And annually, the region, which covers more than 5,000 square kilometers to the east of Lake Ontario, can see up to five times that amount. In comparison, Toronto, on the northwestern coast of the lake, averages less than 125 centimeters of snow each year.

06 Mar 2018

Double-dip La Nina blamed for Colorado's dry winter

In January 2017, skiers at Wolf Creek Ski Area in southern Colorado were enjoying a base snow depth of more than 350 centimeters — enough snow to cover most rocks and other obstacles. But this year, as of mid-January, the runs were much sparser, with the base barely clearing 100 centimeters. Powderhorn Resort in western Colorado was so bereft of snow that it had yet to open in mid-January — a month behind their usual December opening. Statewide the snowpack is slim enough to worry not only skiers, but also the state’s climatologists and water resource managers, who held a Water Availability Task Force (WATF) meeting on Jan. 18 to discuss the state’s snowpack and water outlook.

06 Feb 2018

Down to Earth With: Wildfire meteorologist Craig Clements

Not many people are able to combine their work and hobbies the way Craig Clements, a meteorologist at San Jose State University in California, has. “I was always interested in mountain weather,” he says. “I got into meteorology through my interest in mountaineering and climbing.”

19 Jan 2018

Climate change linked to specific weather events for the first time

Three extreme weather events that occurred in 2016 would not have been possible in Earth’s pre-industrial climate, according to the sixth annual report on the attribution of extreme weather events issued Dec. 13 by NOAA and the American Meteorological Society (AMS). This marks the first time that researchers have concluded that a specific weather event would not have been possible without the influence of humans.

14 Dec 2017

Comment: Arctic warming and midlatitude weather: Is there a connection?

Over the last few decades, the Arctic has warmed more than the rest of the planet, but is this Arctic amplification influencing weather patterns in the middle latitudes?
04 Dec 2017

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