Report from The Weather Space states, “An unusual storm system is over Oklahoma and Texas at this time, causing severe thunderstorms and much needed rainfall to the dry areas of both states.”
The reason that this weather system is unusual is because it’s moving from East to West. The storm is expected to last through the end of the week, according to the report. Article continues:
A Low pressure system that started in the Eastern United States has retrograded under a ridge of high pressure to the north over the last couple of days. This system is moving from east to west, which is extremely unusual for this hemisphere.[Emphasis added] We’ve seen these move east to west for a short period of time, but this one will make it to Southern California by the time it weakens.
The upper level system is known as an easterly wave, however I’d like to call it a super easterly wave based on the distance it is going to travel. This particular system will have traveled from one side of the country to the other once it has stopped moving west, diving from there into Mexico, gathering up monsoonal moisture to be put into Nevada and Southern California later in the week into next week.
Rainfall estimations across parts of Central Texas could be over 2-4″ of rain, with more rain (above 6+” possible in parts of South-Central Texas. Severe storms, including tornadoes, hail, and damaging winds will be possible from Texas, New Mexico, and parts of Arizona through the next few days.