If you're new to Southern California, please, please, please don't ever say we don't have real weather.

When record high temperatures in the 90s strike in winter and then that heat wave is run out of town by thunderstorms and lightning just a day or two before the official start of spring, that's pretty much weather. Yeah?

Not only that, but as that very early summer turns back to late winter, or at least toward spring, we could get hail, too, says the National Weather Service.

Crazy? Sure. But what fun it is to live in the age before global warming turns us all into fossil fuel (irony?).

The NWS says there's a 20 percent chance of thunderstorm activity tomorrow, with the main target of the weather being local valleys and mountains. Prime time for this system will be in Thursday afternoon and evening, said NWS weather specialist Stuart Seto.

The action will be the result of a low pressure system moving into the area, he said.

Hail is possible, and there could be as much as one-quarter inch of rain in the valleys and mountains, Seto said. Rainfall in the core L.A. basin would probably only amount to about a tenth of an inch, he said.

In a statement, the service put it this way:

Any thunderstorms that develop will be capable of producing brief heavy rain, small hail, and dangerous cloud-to-ground lightning. Localized street flooding will also be possible.

The upper-level low is associated with unstable air that could produce all that precipitation and electricity, forecasters say.

Lightning strikes are hazardous to your health, so Seto warned, “If thunder roars, go indoors.”

However, don't think that summer, er, whatever we just had, is over yet.

Seto notes that area temps will remain above normal as this system passes through, with high temperatures in the low- to mid-70s downtown. Lows will be in the relatively warm upper 50s because the cloud cover sort acts like a blanket.

But afterward, we'll be back to highs near or at 80 degrees for the weekend, he said.

See? We told you. Weather.

Send feedback and tips to the author. Follow Dennis Romero on Twitter at @dennisjromero. Follow L.A. Weekly News on Twitter at @laweeklynews.

Advertising disclosure: We may receive compensation for some of the links in our stories. Thank you for supporting LA Weekly and our advertisers.