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- Strong storms could threaten the south on Wednesday and Thursday.
- Damaging winds, heavy hail and some tornadoes are possible.
- Heavy rains are also possible, especially in the Ohio Valley, where sudden floods can be a cause for concern.
- Autumn is considered the second season of bad weather.
Autumn is considered the "second season""For extreme weather, and the threat of dangerous storms and heavy rains will return to the south and the Ohio Valley by the middle of the week.
A cold front will slide east across the southern plains and the lower Mississippi Valley on Wednesday, helping to push a zone of heightened low pressure in these areas.
In front of this front, the humidity of the Gulf of Mexico will bend towards the north, creating an unstable mass of air conducive to violent storms.
The above configuration illustrates the configuration that could lead to severe storms and heavy rains in the south and Ohio Valley in the middle of this week.
On Wednesday, the risks of heavy storms will be greatest from central and east Texas to Louisiana, southern Arkansas and Mississippi, particularly late in the year. and in the evening.
Devastating winds, heavy hail and some tornadoes are all possible threats with these storms.
Forecast of severe thunderstorms on Wednesday (Grayed out on the map above, you will see the likelihood of severe thunderstorms occurring on Wednesday.Note that not all categories apply to the risk of severe weather each day.)
The risk of violent storms could move Thursday on the east coast of the Gulf or the southeast of the country, but, as there are only a few days left, there are many uncertainties in the forecasts.
In addition to the severe meteorological threat, heavy rains likely to flash floods are also possible from the northeast of the lower Mississippi Valley to the Ohio Valley on Wednesday and Thursday, while the cold front and the low pressure system are slowly sliding to the east.
The NOAA weather forecast center has highlighted an area of excessive rainfall Wednesday between eastern Arkansas and north central Ohio..
While most areas of eastern Texas east of the Great Lakes are expected to receive 1 to 3 inches of rain, parts of the Ohio Valley could see more than 3 to 5 inches, which could cause sudden floods on Wednesday and Thursday.
Precipitation forecast (This should be interpreted as an overview of where the heaviest rains can fall in. Larger amounts can occur when bands or thunderstorms get stuck for a few hours.)
Autumn is the second season for severe weather
While spring is known for its dangerous thunderstorms that can produce violent tornadoes, fall can also lead to acceleration during severe storms and is considered the second most extreme weather season.
The activity of tornadoes reaches a secondary peak in the fall in the Gulf Coast states where temperatures and humidity rates tend to be higher. These conditions can sometimes spread northward to the Ohio Valley and the southern Great Lakes.
The average number of tornadoes in October 1991 in the United States is 58. (USTornadoes.com)
Although May is the peak month of tornadoes, six of the 55 largest known tornado outbreaks occurred in October and November, according to storm statistics compiled by Dr. Greg Forbes, meteorological expert for The Weather Channel..
The average number of November tornadoes in the United States between 1991 and 2015 is 56. (USTornadoes.com)
The tornadoes of October and November are caused by hollows at altitude – downstream jet-stream troughs – as well as by cold fronts affecting the south and sometimes the Midwest.
(MORE: The second meteorological season can cause big problems in the fall)
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