More than 5 feet are expected in parts of the Sierra, wrote forecasters at the prediction center.
Forecasters believe blizzard conditions will prevail across the plains next week.
“We are increasingly confident that we will be dealing with a sizable blizzard in the Northern Plains next week,” said Greg Carbin, the Weather Prediction Center’s executive director of forecasting.
The system will move away from the Rockies and begin to strengthen, increasing the likelihood of heavy snow and very strong winds through Wednesday across the Northern Plains. Winter blasts are possible from Colorado, including Denver, and northeast through the Northern Plains. Across the Dakotas, there’s likely to be at least one foot, Mr. Carbin said.
“The potential is there in a really impressive amount,” he added, as he predicts the storm system will most likely slow down.
Severe storms, possibly accompanied by tornadoes, are likely in much of the South.
Forecasters are still trying to pinpoint the exact impact and timing of extreme weather deeper into next week. However, it looks like severe storms, with the potential to produce tornadoes, will form Tuesday over an area from eastern Texas through Arkansas, Louisiana and much of Mississippi, said Bill Bunting, director of operations. forecast at the Storm Prediction Center said.
“Most severe fall and winter weather events typically have several features in common, including a low-pressure system near or north of the area of concern, an increasingly humid stream of air from the Gulf of Mexico. moved north before the event, and Mr. Bunting explained that a cold front was moving eastward toward the area.
“A similar setup is expected early next week, which gives us confidence in the possibility of an area of severe thunderstorm concentration and possibly tornadoes,” he said.
Tornadoes are not uncommon at this time of year, but they are less common in spring and early summer. “We average about four days in December each year with at least one EF1” — on scale from 1 to 5 Harold Brooks, a senior scientist with the National Severe Storms Laboratory, part of the National Oceanic and Atmospheric Administration, said tornado damage ratings – “or stronger tornadoes” “. “There are about 100 days with an EF1 or stronger tornado during the year.”
