Why Los Angeles Weather Is Not as Perfect as Everyone Thinks

Los Angeles has perfect weather. At least that's what popular culture has been telling us for decades. Albert Hammond had a hit song literally titled "It Never Rains in Southern California". The Simpsons, Anchorman, and L.A. Story have all lampooned SoCal meteorologist who can phone it in because their weather never changes. 72. And that's the weather. But guess what? They are all wrong. And this video is going to show you the many ways Los Angeles weather is rather imperfect, including several characteristics unique to the City of Angels that cause devilish weather from something called hydroclimate whiplash to the Santa Ana winds with some marine layer on top.

No one knows the myth about perfect Los Angeles weather better than real meteorologists like Craig Herrera, a national meteorologist for Fox who spent 2 years working in Los Angeles. I still get that today. That must have been a cake job for you. Actually, it wasn't. I dare you to go there and try to forecast in those microclimates cuz it's pretty unique. I mean, you can get every form of weather all within one day. And I remember driving from downtown L.A. clear through Temecula, back over through places like Riverside. And we were chasing storms. We didn't have a tornado, but we had a funnels and we had hail and we had some flooding rains.

Herrera notes his forecast included six different microclimates. So, L.A. basin is its own microclimate. You head over the hill, you go into the San Fernando Valley or the other hill into the San Gabriel Valley, you have two different microclimates there because you're protected in those valleys from surrounding mountains. Within those mountains, you have gaps. And the gaps contribute to how we experience weather. Besides microclimates, there are multiple characteristics unique to Los Angeles that cause extreme weather. The one with the coolest name is hydroclimate whiplash, according to Daniel Swain, a climate scientist for the California Institute for Water

Resources. Really wet periods, really dry periods are an intrinsic part of living in Southern California. But what we're seeing today is this increasing hydroclimate whiplash, which is this paradigm we use in climate science to think about what is happening to the hydrologic cycle. And the short answer is it's becoming more intense. Doesn't mean it rains more on average. Doesn't mean it rains more all the time. But what it does mean increasingly is that when it rains, well, increasingly it pours. But the reverse is also true is that when it's dry in L.A. now, it is really dry. And that on the other side of things really tells us about why we're seeing worse droughts and more severe wildfires. Hydroclimate whiplash

are all essentially increasing for the same fundamental reason, which is that rising temperatures increase the air's capacity to hold water or to evaporate water when that water is available. Todd Hall knows as much about L.A.'s severe weather as anyone. The warning coordination meteorologist for the National Weather Service has himself issued most of the severe weather warnings over the past 20 years. On average, he issues 150 marine warnings for boaters, 10 to 20 severe storm warnings, as well as the occasional tornado warning. And what he has to say about twisters is as dramatic as the movies with the same name. You know, we actually live in Southern California. We live in a very

tornado-prone area. Most people don't know that. The Los Angeles basin actually has a higher tornado density than what we see in the tornado alley. And that's due to the shape of our topography that contributes to that along with the flow that comes with a lot of our storm systems. So, it add extra little element of spin in the atmosphere to that. So, the only difference, of course, being when in Southern California is most of our tornadoes are EF0 or EF1s on the weakest scale where in tornado alley, they're dealing with EF3s, fours, and fives. The reason L.A.'s tornadoes are smaller is because of something called the marine layer, which has a colossal impact on weather. People often think I'm going to California and they show up

in shorts, flip-flops, and a T-shirt. And guess what? They're freezing cuz they're in the marine layer. It's very much an ingredient of Southern California weather. And I mean, it's even in our tornadoes. Now, I should say the marine layer is not the low clouds that we see. It's a misnomer. It's actually the cool ocean air that's pushed in every day. And that's what we perceive as the sea breeze living in Southern California. Todd studied air pollution at UCLA and noted the marine layer traps in pollutants. Although it is better known as the prime source of a certain signature couple of months in and near the beach towns. Well, most people are familiar with May gray and June gloom, July uh no sky, and August. You can go

for 4 months without seeing the sun along the coast. But meanwhile, if you go just 5 mi inland, it's it's sunny and you're enjoying the weather. The colder waters that are moving south from the Pacific Northwest. Those cooler waters create a lot of issues for the actually seeing some of the sun. But wait, there's more unique qualities to Los Angeles that cause imperfect weather. We have not even talked about the Santa Ana winds yet. Here in Southern California, we have three different wind regimes that can create fires.

The most common that everyone knows is Santa Ana winds, and that's basically a flow from the desert to the into the L.A. basin. It's typically is a hot, dry wind. Sundowner winds in Santa Barbara. And those can be devastating. There was a Sundowner wind event that it contributed to the Thomas fire in 2018. And then we even have another more new phenomenon that we're discovering up in SLO County. It's called Santa Lucia winds. It's always been there, but now we have the ability to see these winds in real time. And let's hope Angelenos paid attention in geography 101 because there are local distinctions also impacting the weather drastically.

There are various quirks of geography and climatology that actually make parts of the hills and mountains immediately surrounding the city vulnerable to incredibly dramatic swings. If you're in the middle of a big built-up area with a lot of concrete and a lot of pavement and fewer trees, which is true of a significant portion of L.A. and its suburbs, you do tend to have more extreme heat waves because L.A. is a bit of a bowl. The main part of the city is at a lower elevation. It's surrounded by mountains. So, that pollution essentially gets trapped. Swain also noted Los Angeles's mountains as distinctively impacting the weather.

L.A., believe it or not, is actually a city that can see a lower risk of flooding. When it pours in the mountains, all of it also ends up in L.A. And that makes the city vulnerable to flash flooding and debris flows. And not only are these particularly steep mountains, so the San Gabriel Mountains, for example, are some of the steeper mountains in North America. All of these sorts of things that, you know, we don't have to think about as much in some other places. We're one of the few places on Earth that goes from sea level to 10,000 ft in a span of 35 mi. So, it makes it even more unique. We have something called orographic lift that takes place where we have just an upslope flow going into our mountains. Our storms are already

unstable, but now we're adding a bunch extra lift on top of that. So, it tends to really make precipitation forecasting here challenging. As part of his research as an economist at UC San Diego's Scripps Institution of Oceanography, Tom Coring him studies L.A.'s atmospheric rivers. Basically, it's a long, extended plume of water vapor that originates in Well, to get technical, they come from the subtropics and they move poleward to the higher latitudes. And for us, that basically means they come from around Hawaii and they move up to the West Coast. They used to be known as pineapple express storms. That moist air rises over the mountains and they just dump a ton of rain on us.

Tom's team actually partners with the Air Force to fly above the storms and drop radiosondes through them. Their research, however, is hard to dissect from year to year. One thing that's striking about Southern California, if you look at maps of the United States and you look at the variability in rainfall. Most of the country get have pretty stable precipitation regimes in any given year. But in Southern California, it's wild. It's just off the charts variability. We'll have years and years that are bone dry and then we'll have just this ridiculous wet year where all of this rain falls all at once. The National Weather Service passed along a document tracking significant weather in Southern California dating all the way back to flooding in

Los Angeles in 1770. The document is 200 pages long and ends with back-to-back 30 and 19 car pileups due to fog on the Cajon Pass. The NWS also pointed to multiple drastic weather events, including the downtown L.A. tornado in 1983, monstrous waves in 1988, the Montecito debris flow in 2018, the blizzard in 2023, the devastating floods in 2024, and the wind and fire storms in 2025. So, if not L.A., who does have perfect weather? People often make that claim on the basis of what the average conditions are. And on average, it's pretty nice in L.A. I think what that misses is the fact that there is also a propensity for very extreme weather on occasion. So,

who is responsible for the Los Angeles weather lie? One theory is that it's those living in cities with better weather trying to divert tourists to L.A. instead. Using days of severe weather as the barometer, that would be these five cities with more perfect weather: San Diego, San Jose, Santa Barbara, Las Vegas, and Honolulu.