US: Atmospheric river to blast California — heavy rain and gusts up to 50-70 mph expected - PressFrom - US
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USAtmospheric river to blast California — heavy rain and gusts up to 50-70 mph expected

11:45  12 february  2019
11:45  12 february  2019 Source:   sfchronicle.com

Mudslides, snow, and flash floods: an atmospheric river is soaking California

Mudslides, snow, and flash floods: an atmospheric river is soaking California The storm system stretches hundreds of miles wide and carries as much water as 15 Mississippi Rivers. A massive, gushing river in the sky — a mile high, more than 300 miles wide, and carrying up to 15 times the amount of water in the Mississippi River — is now drenching huge swaths of the West Coast. This phenomenon, known as an atmospheric river, has already brought more snow to northern California in a day than parts of New England have seen all winter. I believe the scientific term for this statistic is "bonkers.

An ' atmospheric river ' storm approaching California is expected to soak most Bay Area cities Wednesday with 1 to 3 inches of rain and blanket the The heaviest rains should arrive as part of a cold front Wednesday afternoon through Thursday morning, bringing wind gusts of 50 to 70 mph in

An atmospheric river is expected to impact the Bay Area beginning Tuesday night and deliver 1 to 3 But over the weekend the forecast has shifted, and the storm is now expected to have a greater Along with the rains , sustained winds of 30 to 40 mph are expected Wednesday with gusts of 60 to


An atmospheric river is expected to hit the Bay Area on Tuesday night, bringing heavy rain, strong wind gusts and an increased risk of floods and slides.

Scientists Develop Category System To Warn Residents About Strong Storms

Scientists Develop Category System To Warn Residents About Strong Storms 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. require(["medianetNativeAdOnArticle"], function (medianetNativeAdOnArticle) { medianetNativeAdOnArticle.getMedianetNativeAds(true); }); 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.

On the coast, San Francisco recorded 50 mph gusts and Oakland 48 mph , the service said. Such atmospheric river drenchings in California are rare but also normal and necessary, the National Fort Bragg in California will get hit from two sides, with up to 5 inches of rainfall by late Thursday

Heavy rain could become an additional hazard alongside gusts of 50 -60 mph , possibly reaching up to 70 mph across exposed coastlines. She added: "A deep area of low pressure will bring heavy rain and strong winds across northern and western regions overnight tonight and through tomorrow

The weather phenomenon, a narrow corridor carrying water vapor from the tropics near Hawaii onto California shores, is expected to dump up to 2 inches of rain in San Francisco and Oakland. Some of the North Bay and South Bay mountains could see up to 4 inches of rain, said Spencer Tangen, a National Weather Service meteorologist.

“All the rain we’re going to get on top of that is just going to lead to worsening flood problems,” Tangen said. “There are higher potentials for landslides and debris flows than we saw before all this rain.”

The heaviest rain is expected to arrive Wednesday morning during commute hours, forecasters said. The National Weather Service issued a flash flood watch for the Bay Area from 10 p.m. Tuesday to 10 a.m. Thursday.

California at significant risk for life-threatening flash flooding, mudslides

California at significant risk for life-threatening flash flooding, mudslides A storm will raise the risk of life-threatening flash flooding, mudslides and avalanches as it will be loaded with subtropical moisture. 

Atmospheric river storms are drought busters in California , dumping huge amounts of rain in narrow corridors within short periods of time. The storm is likely to cause major traffic delays across Southern California , and may bring air travel to a standstill for several hours as winds gust to 50 miles per

Heavy rain could cause flooding and debris flows in California into this weekend as an atmospheric river event takes aim. A storm system tapping into an atmospheric river of moisture will pummel California through early weekend, wringing out heavy rain that could potentially cause flooding

Accompanying the storm is a round of strong winds that could uproot trees and knock down power lines, especially given recent repeated rainstorms that have saturated the ground. Winds along the coast on Wednesday afternoon could reach 30 to 35 mph, with gusts up to 50 mph. Higher elevations may see wind gusts up to 70 mph, Tangen said.

Last week’s snow in the East Bay hills, the Santa Cruz mountains and other spots will likely melt with the arrival of the atmospheric river, Tangen said, and that could contribute to rising river levels.

“This warmer weather is going to melt that snow and that’ll add a little bit to the runoff,” Tangen said.

Warmer temperatures are also expected to prevail in the Bay Area with the tropical moisture, with highs bouncing up to the middle to upper 50s midweek.

Gwendolyn Wu is a San Francisco Chronicle staff writer. Email: [email protected] Twitter: @gwendolynawu

Thousands without power following Northwest storms.
Tens of thousands of people were without power in Washington state and there were concerns about flooding in western Washington and Oregon as snow turned to rain in many parts of the Pacific Northwest . require(["medianetNativeAdOnArticle"], function (medianetNativeAdOnArticle) { medianetNativeAdOnArticle.getMedianetNativeAds(true); }); The National Weather Service reports that Seattle-Tacoma International Airport has received 20.2 inches (51 centimeters) of snow so far in February, the snowiest month in more than 50 years.

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