Midweek, A Storm Loaded With Rain Will Hit The West Coast!

Moisture-packed storm to slam West Coast into midweek

As we approach the middle of the work week, AccuWeather forecasters are keeping a close eye on a storm that will bring heavy rain and mountain snow to the West Coast of the United States. And this is just the beginning of what looks like a stormy end to 2022, with effects ranging from flooding to high winds to major travel disruptions.

AccuWeather experts are keeping an eye on a storm that will roll into the Pacific Northwest at the start of the new week, following several waves of precipitation.

AccuWeather Meteorologist Andrew Johnson-Levine predicts that by late Monday night, heavy rain will spread inland across the Northwest and southward, extending into the San Francisco Bay area. This will be the strongest area of low pressure to arrive in recent days.

“There is a long plume of deep moisture, or “atmospheric river,” that stretches for hundreds of miles across the Pacific, and it is this that is causing the unrest in the atmosphere. Constant, heavy precipitation is produced as this moist air reaches the West Coast and is elevated by the rugged topography “This was clarified by Johnson-Levine.

Los Angeles and San Diego, and possibly even further south, will be soaked by rain late Tuesday and Wednesday as the rain moves southward into the middle of the week.

Johnson-Levine remarked, “San Diego has only received about half of their annual December rainfall, so any rain there will be beneficial.”

The latest forecast from the United States Drought Monitor shows that most of the Golden State is experiencing severe to exceptional drought. Other parts of California could also benefit from the predicted rain. Drought conditions range from moderate to exceptional in the northern Rockies and along the Interstate-5 corridor in the Pacific Northwest.

Although this rain is welcome, Johnson-Levine warns that it won’t be enough to completely end the drought in the state.

Though the rain will help make up for these long-term shortfalls, forecasters warn that too much rain could fall too quickly, leading to flooding.

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“Heavy rain is forecast, especially for the northern part of the Golden State. With the heavy downpour, this is the area most at risk for minor flooding and mudslides “Stated by Johnson-Levine.

A widespread 2–4 inches of rain is expected to fall along the coast from Washington to Oregon and Northern California. It is possible that San Luis Obispo, California, and even Point Conception, California, will receive 1–2 inches of rain. Despite the fact that Southern California is only forecast to receive a trace of precipitation, drivers and air passengers should still prepare for delays.

The Setup

High pressure dominated the majority of the continental United States on Tuesday morning. That opened the door for mild air to rush north and blanket much of the central and eastern United States. All of that is just setting the stage for what will happen later this week.

The Setup

The most notable phenomenon to keep an eye on is a trough, or dip, in the jet stream that will dive southeast, bringing extremely cold air southward. On Tuesday, it moved eastward over the Pacific Northwest, bringing with it rain and snow to the valleys and mountains. On Thursday, the southern Plains will be hit by that initial trough, which will have swiftly swung southeast.

Snow will fall in the Rockies’ higher elevations as the trough’s embedded cold air moves eastward. Thunderstorms will break out across the Midwest on Thursday as cold air from Texas meets warm, unstable air from the Gulf of Mexico,

causing a front to move through the region and move inland to Kansas. Along a “dry line,” or the boundary between dry, desert air from the Southwest and moist air from the Gulf of Mexico to the east, the potential for severe weather will remain for several days.

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Negative Aspects

Temperatures in the western United States are expected to drop by 15-25 degrees below average by the end of the week as cold air from British Columbia spreads southward. The average high temperature in Phoenix is 82 degrees, but on Thursday it is only expected to reach 64. Similarly, the middle the to upper 50s is predicted for Las Vegas on a day when normal temperatures would reach the mid-70s. The weather in both cities is predicted to be rainy.

Negative Aspects

The cold is more rooted in the northern reaches of its range. Temperatures in Seattle will remain in the mid-40s through Thursday, a far cry from the record-breaking 88 degrees recorded there on October 16. Temperatures typically peak in the middle 50s in early November.

Overnight lows will drop into the 20s and 30s across the majority of the Western United States, with the exception of the Sierra Nevada, where they will fall into the single digits and teens.

This is also the area where a weak atmospheric river will lap at the coast, forcing relatively moist air up the mountains. The National Weather Service has issued a winter storm warning for the central Sierra Nevada, predicting 3 to 6 inches of snow above 5,000 feet, with totals of 8 to 16 inches possible at 7,500 feet.

The Toasty Aspect

There will be a dome of high pressure over the Great Lakes for several days to the east of the centre of the developing low-pressure system. The jet stream will be redirected to the north, leading to an increase in temperature in the eastern half of the United States. New England could see temperatures 20 degrees or more above normal as a result.

The Toasty Aspect

Take Boston, for instance; the city is expected to maintain a comfortable 72 degrees on Saturday, Sunday, and Monday. Mid- to upper-70s are possible in the Merrimack Valley to the west of the city; an isolated high of 80 is also possible.

The National Weather Service forecast for the Boston area noted, “To put it in perspective, normal highs in early November are in the mid to upper 50s.” It’s possible that we could set a record high temperature this weekend, as previous records have been set in the mid-to upper-70s for those dates. Through Monday, there are no signs of any significant precipitation.

Whereas early November highs in New York typically hover around 55 degrees, forecasts call for temperatures in the low to mid-70s on Saturday, Sunday, and Monday. And the District of Columbia expects temperatures in the mid-70s, well above the normal lows of the lower 60s.

The Extreme Weather

Where the cold and warm air masses meet in the middle of the country, a storm system will form. Over the High Plains, dry air from the west and warmer, more humid air from the southeast will become more distinct as low pressure strengthens at the surface. On Thursday, it will spread from the Texas Hill Country and Trans-Pesos to western Kansas, where it will become firmly rooted. On Friday and Saturday, it will advance eastward.

Storms are more likely to occur along it. Capping, or the presence of a lid of warm air at the mid-levels to inhibit thunderstorm formation, may prevent the development of widespread thunderstorms on Thursday, though a couple is possible, especially from the Texas Panhandle into southwest Kansas near Liberal. If even two forms, they won’t have to worry about competition from nearby cells and could grow rapidly.

They may develop into supercells or rotating thunderstorms depending on the amount of available wind shear, which is the variation in wind speed and/or direction with height. Salina, Garden City, and Liberal, Kansas, as well as Amarillo, and Lubbock, Texas, should keep an eye on the forecast because they are in a level 2 “slight risk” of severe weather, out of a possible 5.

Last Words

On Friday, the danger will spread eastward, encompassing the entire I-35 corridor from Dallas to Oklahoma City and into south-central Kansas. The danger zone also includes the cities of Waco, Austin, San Antonio, and Abilene. More widespread storms are to be expected because of “capping”

is less likely to take place given the closer proximity of the inciting upper-air disturbance. In all likelihood, they will coalesce into a squall line, bringing with it gusty winds and the potential for isolated twisters to form within the line.


  • Karan Sirari

    I am an author and a public speaker. I was born in India and have travelled to many different countries. I have a masters in public communication from California University and I love to write about famous peoples from different industries.


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