WeatherTodays Forecast


Tale of two tropical waves for Acadiana this week

Posted at 5:23 PM, Jul 20, 2020
and last updated 2020-07-20 23:27:56-04

It will be the tale of two tropical waves impacting the Gulf of Mexico and portions of Acadiana this week keeping our rain chances elevated into the front end of the weekend.

It was a rainy & occasionally stormy one across Acadiana Monday as a tropical wave and weak area of low pressure developing offshore the mid-Texas Coast produced widespread shower and some thunderstorm activity across the region.

Activity will dissipate into early this evening, but there is certainly a chance of some activity working its way inland overnight (and after midnight).

Tuesday will bring another good chance of scattered showers and storms to Acadiana at just about any time during the day and then gradually dissipating by the evening hours.

Highest rain chances Tuesday should be closer to Southwest Louisiana an closer to the disturbance offshore and approaching the Texas Coast.

It should quiet down somewhat Tuesday night into Wednesday as the wave moves inland into Texas.

Even though we should see a little break in the high rain chances Wednesday, there will still be the risk of some afternoon storms.

Temperatures will top out in the 80s again Tuesday with the enhanced chance of rain and additional cloud cover, while Wednesday looks to be briefly hotter, with highs in the lower 90s, thanks to more expected sunshine.

Meanwhile, yet another and more robust tropical wave spanning from the Bahamas down through Cuba is expected to arrive near the Northern Gulf Coast by Thursday, with the chance of storms likely increasing into Friday.

This wave should bring healthy rain chances back to the area, but the heaviest rains should fall mostly offshore with this next one too...but we can't rule out the threat of localized heavy rainfall in spots especially toward the coast.

In addition, the National Hurricane Center is giving this system a 20% chance of developing once it gets into the Gulf. A lower end system such as a tropical depression or weak named storm is possible, but this is expected to moistly a rain-maker and should be moving along at a nice clip.

The next system should allow for a modest increase in offshore winds and seas and we'll continue to monitor the system for any further development.

And after the enhanced rain chances late Thursday into Friday, it appears that the risk of storms will gradually drop this weekend, especially into Sunday.

It should be noted though, that today's 10 Day Forecast maintains decent daily chance of scattered showers and storms to pretty much finish out the month.

The rest of the tropics across the Atlantic does to appear to be heating up, with one wave in the East-Central Atlantic Tropical Basin given about a 20% chance of development over the next 5 days.

Another "candidate wave" is expected to exit the African Coast by Wednesday...and that one may have an event better opportunity to develop.

The Main Development Region of the Atlantic Basin which spans from near the African Coast to the Eastern Caribbean appears to be getting off with a bang...and roughly a month early.

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