Photos: Krewe of Orion _lowres

Advocate staff photo by HILARY SCHEINUK -- Parade-goers reach for coveted throws from masked riders aboard the "Joseph Stalin" float as the Krewe of Orion parade rolls down South River Road, Saturday, Feb. 7, 2015, in Baton Rouge.

The forecast for Saturday couldn’t be more perfect for a day of parades and Mardi Gras fun, with sunny skies and high temperatures reaching the low 70s for Baton Rouge, New Orleans and Lafayette.

But that good fortune won’t last for long.

A chance of rain slips into the forecast Sunday night before the probability of rain increases for Monday and Mardi Gras day in southeast Louisiana.

Although the forecast from the National Weather Service mentions a slight possibility that temperatures and rain could clash, creating a chance of snow in some northern areas of southeast Louisiana on Tuesday evening, the chance is slight.

“I wouldn’t worry about it,” said Gavin Phillips, meteorologist with the National Weather Service’s Slidell office. Snow isn’t a concern, but as of Friday afternoon, the weather doesn’t appear to be pretty on Monday and Tuesday.

When — and how much — rain will fall Monday and Tuesday remains in doubt, but the chances are good that low temperatures and cloudy skies will be in the mix.

“It’s going to be cold and gross,” Phillips said.

“It’s not going to be great weather.”

A more reliable forecast for Mardi Gras day should be available on Sunday, forecasters anticipate.