California Braces for Pineapple Express with Flooding, Wind, and Snow Predicted

FOX Weather is currently monitoring the Pineapple Express, which is an atmospheric river drawing moisture from the Hawaiian tropics. Meteorologist Bob Van Dillen provides a detailed forecast on when and where we can expect to see significant snowfall and rainfall from San Francisco all the way to Los Angeles.

Get ready for a wet and wild ride on the Pineapple Express this week in California. Coastal ranges are expected to receive a whopping 8 inches of rain before the week is over, while cities like Los Angeles and San Diego could experience significant flooding.

The Pineapple Express is an atmospheric river that originates near Hawaii and unleashes a powerful surge of moisture along the West Coast. This atmospheric river can transport an astonishing 27 times more water than the mighty Mississippi River, resulting in a staggering 10 to 15 inches of rainfall.

A woman managed to survive for 15 hours on top of her overturned car during the California floods.

An atmospheric river is set to ride the jet stream and bring heavy rainfall to the Pacific Northwest at the beginning of the week. As the week progresses, it will then shift southward, continuing to bring wet weather to the region.


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According to Meteorologist Bob Van Dillen, the jet stream will be aligned in a west-to-east direction. This alignment will result in the influx of warm air and moisture from the Pacific, specifically targeting California and northern New Mexico. Van Dillen points out that the source of this airflow can be traced all the way back to Hawaii, extending across the Pacific and reaching the southern regions of California.

Significant impacts:

Earlier this week, the moisture from the Pineapple Express is expected to move northward, bringing heavy rainfall to Washington and Oregon. Unlike previous systems, this one is warm, which means that snow is not expected. In fact, forecasters in the area are predicting the possibility of record-breaking warmth until Tuesday, according to the National Weather Service in Seattle.

The area’s already saturated ground will experience further saturation with any additional rainfall, leading to rising river levels and an increased risk of flooding. There is also a possibility of landslides occurring.

Train service between Los Angeles and San Diego has been halted due to the threat of landslides.

Seven states in the US are home to the counties that experience the highest number of landslides. These states are known for their vulnerability to landslide events, which can pose significant risks to communities and infrastructure. It is essential to understand the factors that contribute to landslides in these areas and to implement effective mitigation strategies to reduce the potential impact on lives and property.

According to Van Dillen, the positive aspect of the weather is that it will be forceful and occasionally intense, but it will not linger in one place for an extended period of time.

According to the meteorologist, despite the presence of a high-pressure system, there is still a significant amount of rainfall expected in Northern California starting on Wednesday. He mentioned that the Bay Area can anticipate 3 to 5 inches of rain, while the northern part of the state may experience even heavier rainfall of about 5 to 8 inches.

The Sierra Nevada could receive an additional 1 to 3 feet of snow above the pass level.

Witness the Devastating Atmospheric Rivers and Flooding in California’s History

“The Pacific jet is expected to gain energy and make a return from Wednesday through Friday.”



The third and most powerful in a series of three atmospheric river storms is expected to hit British Columbia on Tuesday and move southward. This storm could potentially lead to river flooding in the coastal Pacific Northwest.

Van Dillen mentioned that rain is already moving across Oregon and is beginning to reach California on Tuesday evening.

California experienced a significant weather event in 1861-62 known as the ‘Arkstorm’ which brought historic 1000-year floods to the region. This prolonged event lasted for 8 weeks and was characterized by the occurrence of atmospheric rivers.


According to meteorologist Van Dillen, the rain is expected to begin in the northern parts of California on Wednesday morning and continue into the afternoon. Additionally, there may be some snowfall in higher elevations.

The forecast predicts that the heaviest rain is expected to fall north of the San Francisco Bay Area, which increases the likelihood of flash flooding in that region.


“And from Wednesday afternoon into Thursday, the rain intensifies and spreads across the lower regions of California,” Van Dillen stated. “Cities like LA and San Diego can expect more rainfall, although not as heavy as the previous week. That’s the positive aspect of the forecast.”

Coastal Southern California remains susceptible to flooding, particularly in areas located along rivers.

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Friday to Monday

By late Friday, the heaviest rain will move through Los Angeles and San Diego counties. It will then continue its path through Arizona and even reach New Mexico over the weekend.

According to the Center for Western Weather and Water Extremes, the Climate Prediction Center (CPC) has already forecasted a moderate risk of heavy precipitation, heavy snow, and high winds in the Western US from February 2nd to February 5th. They also mentioned the potential for flooding along the California coast and in Arizona during this period.

According to meteorologist Van Dillen, snow is expected to arrive soon, which is great news for higher elevations in the Sierra Nevada range, the Four Corners region, and northern Nevada.

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