Tag Archive for: Weather

Atmospheric River Possible Next Week For California, Raising Flood Concerns

Computer models are showing a growing likelihood of an atmospheric river storm hitting California late next week, raising concerns that if a warm “Pineapple Express” barrels in with enough force, it could melt parts of the state’s big Sierra Nevada snow pack and increase flood risk. Atmospheric scientists and meteorologists say more will be known in a few days. The storm could still fizzle the way hurricanes that develop far out in the Atlantic Ocean sometimes fail to materialize or make landfall.

Wet Winter Greatly Reduces Drought Conditions In California

A very wet winter has greatly reduced drought conditions in California, but Ventura County isn’t out of the woods yet. The U.S. Drought Monitor reports that more than 34 percent of the state including the Sierra Nevada, much of the Central Valley and the San Francisco Bay Area is free of any significant dryness. Ventura County is in a portion of the state rated as “abnormally dry” after rain eased the “moderate drought” rating for an area that stretched from the Central Coast down through the southern tier of the state.

2018 Was The U.S.’s Third-Wettest Year On Record—Here’s Why

On Wednesday, NASA and NOAA announced that 2018 was the fourth hottest year on record. But the impacts of a warming planet extend beyond just warming air; the feverish state of the planet is also changing when, where, and how intensely rain and snow fall. And 2018, the reports say, was the third-wettest year since 1895, when steady record-keeping began. Overall, the U.S. got 4.68 inches more precipitation in 2018 than the 20th-century average, but that rain and snow was not anywhere close to evenly distributed across the country. In the eastern half, several states, like North Carolina and Virginia, blew past their previous precipitation records, while most of the western U.S. remained mired in drought.

Scientists Develop Category System To Warn Residents About Strong Storms

When you hear about a category five hurricane, you know it can be deadly. Now meteorologists have created a new scale to track the strong winter storms that slam the west coast. The new system could help give more people warning and ranks some of our past storms. Northern California is no stranger to strong storms that cause flooding, levee breaks, and mudslides. In the past, they’ve been known as a pineapple express, and more recently they’ve been dubbed atmospheric rivers. Now scientists have developed a new scientific scale to track them.

New Scale Will Measure Atmospheric Rivers In California From 1 To 5, Like Hurricanes

Marty Ralph was sitting in a San Francisco restaurant a couple of years ago when the morning forecast came on the TV, showing the typical weather symbols indicating what the week ahead would bring: a sun, a cloud, a rainy cloud and a darker, more ominous rainy cloud. Ralph, the director of the Center for Western Weather and Water Extremes, knew that at the end of the week, an intense atmospheric river storm was coming through the area. But he didn’t think the TV meteorologists could convey that very well with the icons on the screen. So he and a team of researchers got to work creating a ranking system that would be more helpful.

All Yosemite Roads Closed; 7 Feet Of New Sierra Nevada Snow

All roads in and out of Yosemite National Park were closed Tuesday due to heavy snow and fallen trees, following four days of winter storms that blanketed the Sierra Nevada mountains. Some ski resorts near Lake Tahoe received 7 feet or more between Friday and Tuesday morning. “We’ve had incidents throughout the park,” said Yosemite spokesman Scott Gediman. “We’ve had trees come down. We’ve had vehicles slide off the road. Power is out at Wawona.” Gediman said all hotel reservations for Tuesday evening have been cancelled. The park’s ski area at Badger Pass also was closed Tuesday.

All This Rain Has Made a Big Dent in the Drought

How stormy has California been? Stormy enough that parts of Orange County got two inches of rain, enough to force Disneyland to close early,something the park hardly ever does. (This was unrelated to the guy jumping off Space Mountain last Thursday, temporarily shutting down that ride.) Here in San Francisco, we got 1.13 inches between Saturday and Sunday, with more this morning. If you were even slightly late to work today, your cuffs probably got soaked, since it was pouring hard downtown right around 9 a.m. But all this rain has led to another positive consequence for our abnormally-dry-is-the-new-normal state: The low-level drought has abated significantly.

Huge Storms are Slamming California with Torrents of Rain and Heaps of Snow

The second in major storm systems is battering California and other parts of the West Coast. It’s unleashing strong winds, heavy rain and massive amounts of mountain snow. Much of the state has already seen 200 to 400-plus percent of normal precipitation over the past week, and the same region is also generally running well above normal year-to-date. All this moisture has translated to over six feet of new snow in parts of the Sierra mountain range, and it’s still falling.

Here’s How California’s 6 Feet of Snow in 24 Hours Compares to Other Snowfall Extremes

Incredible amounts of snow have fallen throughout parts of the Mountain West since last Friday after a one-two punch from winter storms Kai and Lucian. The Sierra Nevada, straddling the border between California and Nevada, has been particularly hard-hit, where one ski resort tallied 6 feet of snow in just one day. Taking that crown is June Mountain, east of Yosemite National Park. June Mountain reported 72 inches of new snow in the 24 hours ending 9 a.m. PST Sunday morning.

San Diego County to Get Foot of Snow, Heavy Rain in ‘Full On’ Day of Winter Tuesday

Tuesday’s weather forecast contains a sentence not often heard in San Diego County: We’re going to have a day of full-on winter. A distinct river of uncommonly cold, moist air will flow through the region, bringing heavy snow to parts of Mount Laguna and Palomar Mountain, and about half as much to some lower elevations. The mountain peaks could wind up with a foot of snow between late Monday and late Tuesday, while areas like Julian could get a half-foot, said the National Weather Service.