Ploughing to start out with sun, but rain clouds on the horizon
Get to Ratheniska early if you want to beat the bad weather.
The Ploughing Championships opens today outside the Co Laois village with the weatherman warning the clouds will darken as the week goes on.
"Tuesday will be good with plenty of sunny spells," said Met Eireann's Harm Luijkx.
"But we can expect a few showers. Temperatures won't reach any higher than 14C so it might be a bit chilly but all in all it won't be too bad," he added. "Wednesday will bring more showers. But Thursday will see the worst of the weather with blustery cold conditions and plenty of rain."
National Ploughing Association managing director Anna May McHugh warned motorists to give themselves "plenty of time" to avoid any harrowing traffic hiccups.
"We are back on this site for a third year and people may say to themselves 'I know where I'm going, I'll leave a little later' but imagine if everyone said the same thing. Give yourself plenty of time to get here," she said.
The population of Co Laois will more than double as up to 280,000 people descend on the 84th instalment of the National Ploughing Championship.
Work on the special 800-acre site, which hosts the competition for a third consecutive year, started on August 4 in preparation for the mammoth event.