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Another atmospheric river is slamming California

This image from the GOES-18 satellite shows the latest atmospheric river on March 13, 2023, about to make landfall on the west coast of the United States. Officials expect widespread flooding.via image CIRA/CSU & NOAA

Meteorologists: From Storms to ‘Hammer’ Flooding Conditions

Another temperate atmospheric river is poised to drop several inches (6 inches (15 cm) or more in some areas) of rain into California’s already wet landscape. The peak of the event is expected on Tuesday, March 14th, 2023 and is expected to continue until Wednesday, March 15th.

The National Weather Service (NWS) provided a more dire situation predict Monday night (March 13th):

The environment is highly favorable to prolonged rainfall enhanced by topography along the central and southern coastlines and the Sierra foothills. The majority of global guidance and high-resolution guidance bring 3 to 6 inches or more of rain to this portion of the state, an area that still retains high-flow flows from previous not-so-distant atmospheric river events. Some have also occurred in

To make matters worse, the NWS said the storm would melt some. record amount of snow Cover Sierra:

Higher dew points are expected to penetrate the region, setting the stage for melting snowpacks, which could be facilitated by heavy rainfall, thus increasing the threat of rapid runoff and the regional extent of flooding.

The NWS expects the latest atmospheric river event to continue until Wednesday, March 15th. Excessive rains will move east across the United States and could also be a problem in parts of Arizona.

Meteorologists, on the other hand, debate systems for intensity ranking of rivers in the atmosphere, as they do for hurricanes. They say they hope the ranking will help keep people aware and safe.

Foothills and internal flooding are expected

As of midnight on March 13, some parts of California were under mandatory evacuation orders in anticipation of the upcoming storm. FEMA Warn residents.Meanwhile, 40 of California’s 58 counties already have emergency.

An atmospheric river storm over the weekend caused widespread damage. Damage included levee washout, minor tornadoes, large and widespread flooding, and the Sacramento Bee. reportThe paper describes the expected storm impact around the capital and throughout the northern half of the state.

But virtually all of Northern California’s interior is under flood watch by the Bureau of Meteorology due to the influx of atmospheric rivers this week. Parts of the Sacramento Valley could get up to 3 inches of rain Monday night through Tuesday night, and parts of the foothills could get up to 7 inches of rain.

of California Nevada River Forecast Center shows that 16 rivers and streams will exceed flood levels as of 12:00 AM UTC 07:00 on March 14th. Most are in the Sacramento and San Joaquin valleys. A further 34 waterways (stretching from the Oregon border to Mexico) are expected to pass the monitoring stage.

Increased snow cover could mean weeks of flooding

climate scientist Daniel Swain Recent storms that hit California have increased the amount of snow in the Sierra.

The added depth means that the state’s mountains have more snow than ever recorded.

Swain warns that the latest storm, despite its warmth, will likely add to those totals.

And that could lead to severe flooding over the next few weeks, likely starting at the end of March.

Atmospheric Rivers: An illustration of the trajectory of clouds as they flow across the Pacific Ocean to the west coast of the United States.
An atmospheric river hits California on Friday, March 10, 2023. The system has brought dangerous amounts of rain to the state, which is expected to continue into early next week. Additionally, a second atmospheric river is predicted to hit the state starting Monday.via image CIRA/CSU/ NOAA/NESDIS.

the storm is already deadly

Atmospheric rivers hit California and the West Coast on Friday (March 10, 2023), causing nearly statewidedangerous rain eventAlready flooded from weeks of rain and snowfall, California was hit with floods over the weekend, causing rivers to flow over their levees into low-lying areas. At least two of her deaths were attributed to the flooding. And some communities became orphaned.

Forecast updates and damage reports from every corner of the state filled with social media.

what i’ve seen so far

Last chance to get the lunar calendar! There is only a little left. Now on sale.

Urban areas and highways are also affected by atmospheric rivers

Central Sierra Nevada foothills hit hard

In Sequoia National Park

Rain-flooded coastal areas

In Santa Cruz County, the San Lorenzo River crosses its banks

Bottom line: Another atmospheric river hits California on Tuesday, March 14, 2023, bringing dangerous amounts of rainfall and additional flooding. See social media posts documenting the event here.

Dave Adarian

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About the author:

Award-winning reporter and editor Dave Adrian’s love of space lies on the historic summit of Mount Hamilton, California, far above Monterey Bay, east of San Jose, in the foggy Diablos Mountains east of San Jose. It started during a summer school trip to Lick Observatory. End of the endless blue Pacific Ocean. The excursion continues today. Dave continues his nocturnal adventures, perched in front of a telescope eyepiece in the dark, or as a naked eye observer chasing stars as they wander through the night fields. A lifelong resident of Tulare County, California – the Great Sun where he’s an agricultural paradise where the Joaquin Valley and Sierra Nevada meet in endless grassy hills – Dave is larger than Delaware and Rhode Island combined I grew up in the wilderness. One that spends the night under pitch-black skies above some of the highest peaks and most roadless regions of North America. I learned. He has worked as a reporter and editor for many online and offline news publications so far in his nearly 30-year career. His most literary hope is to share his passion for astronomy and all things related to space with those who want to join the adventure and explore the past, present and future of the universe.

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