just minutes ago. South Carolina is ordering mandatory evacuations along its entire coastline, as Hurricane Florence, which is now a category four storm powers its way through the Atlantic. Look at the size of this thing. We're going to show it to you on a bigger map so you have a sense of how big this storm is. Florence is expected to make landfall in the Carolina's on Thursday. Right noon to Mars September 11th. I'm all I have already ordered the mandatory evacuation of all people in all of the evacuation zones. We do not want to risk one South Carolina life in this hurricane. So we want them to suffer some inconvenience. The storm has caused a Trump campaign to cancel a rally in Mississippi scheduled for later this week. NBC meteorologist Michelle Grossman joins us now with the latest on this major storm. You know it's serious because Michelle's in here with me. This is big. It's slow moving and it's powerful. That's right. There's no place I'd rather be. Let's start with that and you're right. This is a serious situation and we're going to continue to watch us over the next several days. Time is of essence here. We have a few days before it really does make landfall. So make your plans. Now we're looking at a destructive storm by Thursday and Friday. You can see by this graphic here how conducive we are for these strong storms, right? We have three storms in the Atlantic, two in the Pacific and even the remnants of gourding affecting parts of the Northeast back to Texas. So let's hone in on Florence here. You can see a huge storm, right? We saw that on satellite just a few minutes ago and we're seeing the bubbling thunderstorms. We're seeing that eye form just a perfect storm really and we're going to continue to see this as we move across the Atlantic here. So winds at 130 miles per hour. We're going to see strengthening over the next several days. We have ingredients that are just right for blossoming storms. We very warm waters that really helps to fuel the storms. That's in place. The second one is a light wind shear. So wind shear tends to rip apart a storm. That's not there. So we're going to see the ingredients helping it to move towards the coast here again, making landfall as a category for storm and a pretty category strong one as well. So as we go throughout time here, even as it makes landfall, we're going to have lots of problems here. I'll show you that in just a minute, but it's still a category one storm. So we're still going to have some very windy conditions, some high surf, lots of problems with these storms, even destructive problems. Here's a setup. We've a steering mechanism. That's not a good thing. We have an area of high pressure. It's a big one. It's going to blossom tomorrow. It's going to help the storm. I helped to steer that category for a storm right into the southeast, depending where it ends up over the next several days. And then the second problem is that high to the north. So once it makes landfall, it's going to get stuck there. Kind of when you're out on the roadway, you get stuck or there's a wall. It's not going to be able to go anywhere. So it's really going to stall. It's going to sit and spin and just drop lots and lots of rain over the next several days. We're talking anywhere from five up to 15 inches of rain, even higher than that. So, Ellie, we're not talking about snow. We're talking about rain. It just sounds like a lot of rain, and it will be. We're going to see some pretty bad flooding as we go throughout the next several days. And it doesn't end this weekend. We're going to see those problems in to next week. So let's talk about the winds as well. That's going to be a problem where you see the pink, the highest winds. So Cape Hatteras, Wilmington, Raleigh, there you are in the pink, even down to Charleston. A little less, but still moderate for Ronoak Charlotte Charleston. Some really big wind gusts. So keep in mind we could see some parolines down. We could see some trees down blocking roadways. So you want to get the water. You want to make sure you have the flashlights and batteries. This is the time to prepare. I can't urge that enough, right? We want to hope for the best, but we're really going to prepare for the worst because we're seeing this trend to stay intact day after day after day. There's not a whole lot in its way to stop it. So let's talk about the rain falls. We go throughout time here again, five to 15 inches of rain up to 20 in some spots. And we're talking training over some areas. So it's not going to move like some other storms. Think Harvey where we just saw that rains day after day. The bulls eye will be where you see the hot pink, seven inches isolated higher amounts as we go throughout time. And then again, we're just really active over the entire tropics and the ingredients are there for these really big storms. All right, I'm heading out there. I'm going to be in the Carolinas for this worth noting though that Charlotte is within an area that American Airlines is going to start canceling flights now. That's what I think you know what my twin sister has a storm has a flight on Thursday. They're going to start canceling probably late tomorrow. Yeah, so everybody should be ready for that if you've got plans to go to the southeast because Atlanta's close by and Charlotte's close by. These are both hubs for Delta and for American. It's going to affect flight flying and travel across the entire country. Michelle, thank you. Thank you, Michelle. Hey, there. I'm Chris Hayes from MSNBC. Thanks for watching MSNBC on YouTube. If you want to keep up to date with the videos we're putting out, you can click subscribe just below me or click over on this list to see lots of other great videos.