[ad_1]
Hurricane Rosa, who was once powerful, is now a modest tropical storm. Nevertheless, it is still about to hit hard – in the form of heavy rains that flood the southwestern desert.
Rosa is located on the Baja California Peninsula, Mexico, Monday night, possibly in the form of a tropical storm or depression. But reducing wind does not mean the threat is diminishing – in fact, concern is growing over a potentially dangerous flood.
The flash flood watches extend for 750 miles, ranging from the Mexican border to the north via Utah. "These amounts of rain can produce flash floods that threaten life," the National Hurricane Center wrote on Monday. "Debris flows and dangerous landslides are also possible in mountainous terrain."
Areas under flash floods are watching due to the influence of Tropical Storm Rosa. (National Meteorological Service)
Isolated debris flows will be possible as far west as the Mojave Desert, "especially on fresh burn scars, where heavy rains can cause a cascade of rocks [and mud], Said the national meteorological service.
A first group of light to moderate rain had already started Monday in the interstate corridor of southern Arizona. This aperitif tour will give way to strong bands of rain late Monday night until Tuesday morning. The heaviest precipitation will fall just north of the traffic center, which is expected to continue from Yuma to Flagstaff until Tuesday afternoon.
Yuma, Arizona, received 0.65 inches of rain Sunday only while the moisture was drawn inland before the storm. This does not seem too impressive until you remember that they average only 3.78 inches per year. In other words, it's the equivalent of 62 days of rain over 24 hours.
The Phoenix National Weather Service warns that a diameter of 1 to 2 inches with localized amounts of 4 inches could fall. "A lot of the heaviest quantities will probably be concentrated in the steep areas north and northeast of Phoenix," he wrote. in a discussion Monday morning. This is where the mountains of the Tonto National Forest could draw in moisture and further improve precipitation.
Rainfall predicted until Wednesday. (PivotalWeather.com)
The grandstand will have its share of the action on Tuesday as well, with torrential rains arriving at sunrise until noon on Wednesday. Jackpot totals should remain south, with a maximum of two inches in the city.
While the fire hose brought back by Rosa will begin to close north of Interstate 40 in Arizona, disturbed high-altitude weather will keep scattered showers in the afternoon from Tuesday through Wednesday. between western Nevada and western New Mexico, particularly around the Four Corners area.
This high-level swirl left by Rosa will then spread to Utah between the middle and the end of the week, bringing cloudy skies and a few showers. The sun will return to the flooded areas further south.
Although it is rare for tropical cyclones to affect Arizona, this is not uncommon. In general, this happens once every two years. Most bury themselves in tropical rain storms as they emerge over the mountains, but since 1965, at least eight of them have met the wind requirements for tropical storms. The most recent of them – Nora – dropped more than a foot of rain on Mount Harquahala in 1997. It is rare to realize this kind of tour de force in the desert.
The East Pacific has been a hotspot for hurricanes this year. Eight storms have already reached the major hurricane status, reaching grade 3 or higher on the Saffir-Simpson wind scale. Rosa peaked at Category 4 with winds of 145 mph before weakening. The average for a given year is slightly more than three. The most active years for hurricanes in the eastern Pacific tend to occur during the El Niño periods, but this year is an unusual exception.
At the same time, the recent tropical storm Sergio is expected to become a major hurricane in the open sea in the eastern Pacific until Thursday.
[ad_2]
Source link
