Home > Daily Forecast, Tropical > September 5, 2017 #TriCitiesWx Forecast

September 5, 2017 #TriCitiesWx Forecast

September 5, 2017

While we get showers and thunderstorms thanks to a cold front, Hurricane Irma has reached historic levels of Category 5 strength (there is NOT a 6!) in the Atlantic. Where it goes will have an impact on our weather, but that’s after the scope of this forecast. Welcome to the Tri-Cities Weather Blog forecast for tonight through the weekend!

I’ll have more on Irma and her cohort Tropical Storm Jose in a bit. For now, the rain here is keeping us cool, and cool temperatures will continue after the cold front. Lows might dip below 50 as soon as tomorrow night! Here’s the outlook:

  • Tonight-Rain likely, sometimes heavy, with a few thunderstorms and late night fog. Lows near 60.
  • Wednesday-Clouds and rain early, maybe some sunshine late. High 68.
  • Wednesday night-Partly cloudy, much cooler. Low 49.
  • Thursday-Mostly sunny. High 68.
  • Friday-Mostly sunny. High 74.
  • Saturday-Mostly sunny. High 77.
  • Sunday-Mostly sunny. High 77.

We won’t be waiting long for the cold front to move through, as that happens tonight. But interestingly, there is a lot of rain behind the front. So we’ll see scattered showers continue to be the case overnight, with thunderstorm possibilities dropping as time goes on.

Wednesday looks less and less like a chilly, damp day, but rain is possible for at least the first half of it. I’m holding out hope for some sunshine to peek through late in the afternoon. After that, high pressure brings clear skies for our weather all the way through the weekend.

That said, Irma is a big concern for anyone with interests in Florida. It is at Category 5 storm, with sustained winds to a mind boggling 185 miles per hour. That’s happening only near the inner core, or eye wall of the storm. Winds diminish outside of that. Regardless, it’s a frightening thing.

As geography goes, you get the Leeward Islands first, then Puerto Rico, Hispaniola (Dominican Republic and Haiti), then Cuba going from east to west. All of those islands will get impacts from Irma for sure. After Cuba, South Florida and the Keys come into play.

The National Hurricane Center’s latest update shows Irma near Puerto Rico tomorrow night, then near the eastern tip of Cuba by Friday morning. By Saturday, it should start to make a right turn toward Florida. It could go through Florida, up the east coast, or up the west coast. None of those things are good.

However, Irma’s interactions with the islands will weaken it somewhat. A slightly south shift into Cuba and the mountains on that island will weaken it a lot. But if it stays north of Cuba, a landfall in Florida will be a very dangerous thing, potentially at Category 4 strength. Computer models right now just can’t agree on which side of Florida the storm will go at this point.

After landfall, it could make a second landfall along the Georgia coast, and perhaps will bring us some rainfall in a week’s time for next Tuesday. There’s a very long way to go before then, so I’ll keep an eye on it. Land weakens tropical systems thankfully, so rain and potential flooding will be all we see if the storm moves through our neck of the woods.

I’m saying “it could” a lot because there’s always the chance of Irma moving west past Florida and into the Gulf. So if you know anyone from Savannah to Mobile, it might be good to make sure they know what’s going on and can get out if need be.

Tropical Storm Jose is behind Irma right now, but it’s basically a fish storm in the central Atlantic. We’ll cross that bridge when we get to it, if we need to. Irma is first, and the most important thing to watch right now in the tropics.

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Categories: Daily Forecast, Tropical
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