One more time. A fast storm is about to hit the Bay Area, and the Meteorological Department has issued a flood warning.
Last month, the Bay Area was hit by a winter blizzard, and this heavy rainfall will not ease anytime soon.
This weekend, a wave of low pressure is gradually approaching coastal California, triggering a flurry of heavy rainfall in the Bay Area and leaving the Sierra Nevada with snow. Rainfall can reach up to 6 feet at the highest point.
This week, the U.S. will have a sunny Friday with dark clouds, with highs of around 60 Fahrenheit in the North Bay, East Bay, San Francisco, and the peninsula, and over 60 Fahrenheit in the South Bay.
From Saturday to Monday, there will be a persistent storm in Northern and Central California, accompanied by heavy rainfall, high winds and high waves. The U.S. National Weather Service issued a flood warning for the Bay Area, Santa Cruz, Monterey area on Friday and began at 10 a.m. on Sunday and continued through Wednesday morning.
According to **, a fast-moving storm will sweep through the U.S. Bay Area on Saturday, and there will be a heavier heavy rain from Sunday afternoon until Tuesday. The reason for this phenomenon is a slow climate system called "turning off the depression".
Here's an update on the storms known as of this week::
Saturday's first storm.
In coastal California, there will be a closed low pressure system from Sunday through Wednesday.
This "truncated" area of low pressure will approach the coast by the end of this week and form a narrow layer of atmospheric water vapour in the air. Such storms will last for several days. Blocking the low pressure works in tandem with the flow of water in the air to allow the Bay Area to receive up to 6 feet of rain Saturday through Wednesday. There were two chances for this rainstorm: Saturday afternoon and Sunday evening.
Saturday's first rain is likely to be concentrated in the Beibu Gulf, where the heaviest rainfall will occur. When the rain stops late Saturday, Santa Rosa will have 2 feet of rain. Mendocino County, as well as the high latitudes of the North Bay, will see heavier rainfall. San Francisco and Oakland will get nearly 1 foot of rain, while San Jose will get 05 feet of precipitation.
According to the Weather Service**, there was light rain in the Bay Area on Saturday with potential flash flooding.
The Weather Center expects 05 feet of rain and flooding is possible.
The second blizzard from Sunday to Tuesday.
On Sunday, there will be a chance of heavy rain in the bay as the depression approaches the coast, especially in San Francisco, San MartÃo, Santa Cruz counties, where small flooding is possible.
From Sunday morning, the weather will be mostly dry, but at night there will be heavy rain or thunderstorms in most areas. A minute and a half to a foot of rain will cause urban flooding and rapid rise of rivers and cause mudslides.
It is difficult to accurately predict the timing, intensity and location of the maximum rainstorm on Sunday and after when the depression is blocked. Rain will continue to increase on Monday and Tuesday, with an extra 1-2 feet of rain causing flooding.
Rainfall forecast from Sunday to Wednesday.
Both types of precipitation will add 1-5 feet of precipitation in urban areas and 6 feet or more near Santa Cruz and Mount Tamapes.
The storm will also hit Southern California. Rainfall will reach 2 to 5 feet in large cities and 4 to 8 feet at high latitudes, according to the National Weather Service, the National Weather Service, a national weather service in Los Angeles, and this area will be hit by flooding.
Heavy rain Saturday through Wednesday will cause moderate to heavy precipitation (2-5 feet of rainfall, excluding 4-8 feet in the mountains), snow cover in the mountains (7,500 feet 1-3 feet high), southerly to southeasterly winds, potential flooding, rockslides, and potential power outages. From Sunday night to Tuesday, the heaviest rainstorms and the biggest consequences will occur.
Note: Stay away from low ground, away from high waves on the coast, and be prepared for Tuesday morning after Sunday. Be sure to keep an eye out for recent weather conditions.
Wave. While rain was the biggest contributor to this weekend's storms, waves and waves can also cause some problems.
Because the hurricane is coming from hundreds of kilometers away from the coast rather than from the coast, it will be smaller than the one that hit the Bay Area on Feb. 4. On Saturday and Sunday, especially in the afternoon and evening, winds from the Mainland can reach 25 to 35 miles. From the coast to Santa Cruz and then to the mountains of the Gulf of Tonkin winds, gusts can reach speeds of up to 45 km/h.
Storms outside the shore can stir up the sea and push the rough waves to the shore. The U.S. Weather Service has issued a strong wave warning, expecting 18 to 22 feet of waves from 10 a.m. Saturday to 4 p.m. Sunday, and 28 feet of waves on the steep shore facing west.
Despite strong wave warnings, weather forecasts say that this week's waves will not cause flooding along the coast. By the end of the week, the tide will be 30 to 40 feet lower than it was last December, which has caused damage to the waves in Papefika and Capatola.
Alpine snow. The weather forecast says that travel in the Sierra Nevada will be very difficult due to the ongoing snowstorm.
The first snowstorm occurs from 10 a.m. on Saturday to 4 a.m. on Sunday, with 4-8 inches of snow falling over 6,000 feet, with the highest snow depth reaching 1 foot. Gales can reach speeds of up to 45 miles per hour.
There will be 4 feet of snow in Nevada's high latitudes during the ongoing storm.
The second time, it will be more violent and more persistent. There is a 2 to 3 feet snow warning from Sunday night through Wednesday morning. The summit has 4 feet of snow and 55 kilometers of wind speed.