At the beginning of this Spring, we are in a weakening La Nina.
There is a strong high-pressure system in the North Pacific, and low-pressure remains over Canada. That bends the jet stream down over the northwestern United States, into Texas and the lower Midwest, and then up into eastern Canada. That tends to suck in warm Gulf moisture to blend with the colder dry jet stream air, and it draws in very dry, hot Southwest air behind it.
Basically, conditions are very ripe for atmospheric turbulence, thunderstorms and tornadoes this spring. It happens. During El Nino years, the weather pattern is reverse.
At the beginning of this Spring, we are in a weakening La Nina.
There is a strong high-pressure system in the North Pacific, and low-pressure remains over Canada. That bends the jet stream down over the northwestern United States, into Texas and the lower Midwest, and then up into eastern Canada. That tends to suck in warm Gulf moisture to blend with the colder dry jet stream air, and it draws in very dry, hot Southwest air behind it.
Basically, conditions are very ripe for atmospheric turbulence, thunderstorms and tornadoes this spring. It happens. During El Nino years, the weather pattern is reverse.
Nothing unusual is happening.