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Tropical Storm Rosa has not yet landed in Mexico, but its outside bands are already delivering heavy rain in the southwestern United States.
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Rosa had winds of 50 mph and was about 140 km southwest of Punta Eugenia, Mexico at 2:00 am local time. The storm is moving north-east at 20 km / h.
Abundant rains from Rosa are spreading in the Baja California Peninsula and in the extreme southwestern United States, flash flood observers have been launched for parts of the region, from California to Idaho.
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Rosa will continue to weaken Monday before her scheduled arrival Monday night on the northern peninsula of Baja California. Rosa will be guided north and east in the extreme southwestern United States by an approaching trough from the west.
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The remains of Rosa are expected to move Monday in the southwestern United States and bring abundant rainfall, which could cause flash floods, landslides and landslides over the next few days. Rainfall rates of 1 to 3 inches per hour are possible in the heaviest rain bands.
In the southwest desert, 1 to 4 inches of rain is possible, especially in parts of southern and central Arizona. In Baja California, more than 3 to 6 inches of rain are possible locally. In addition, up to 1 inch of rain is possible in California, with most of the rain arriving Tuesday and Wednesday late.
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Flash floods could be improved locally because of the mountainous terrain, the canyons quickly becoming very dangerous.
Heavy rains will spread in the four corners on Tuesday and last until Wednesday.
Dramatic temperature changes
In the meantime, east of the Rockies, a fairly dramatic temperature gradient has formed between the central and northeastern United States. Some parts of the country could see extremely different temperatures on either side of this frontal system. For example, Kansas City, Missouri, will reach nearly 80 degrees, while Omaha, Nebraska, will remain stuck in the 50s – it will make nearly 20 to 25 degrees difference over a distance of 100 to 200 miles.
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Storms develop along this frontal system. Heavy rains fall on Monday morning from southern Wisconsin, Michigan, with rainfall reaching 1 inch per hour. A small area in the suburbs of Chicago and Milwaukee is exposed to violent storms Monday afternoon and evening, with damaging winds and heavy hail.
On Tuesday, strong storms will develop in parts of the northeast, with heavy showers and gusty winds.
ABC News
As the first week of October begins, temperatures in most of the central and northeastern United States will increase. Plains temperatures in the northeast will be near 80 degrees. It will look more like summer than in Wichita, Kansas, up to New York. And in the northern United States, temperatures will be in the 60s and 70s.
Our weather forecast for the next two weeks shows that above average temperatures are likely in the eastern United States.
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